/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/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 13:06:09,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:06:09,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:06:09,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 13:06:09,640 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 [2022-02-15 13:06:09,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:06:09,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:06:09,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:06:09,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:06:09,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:06:09,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:06:09,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:06:09,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:06:09,665 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:06:09,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:06:09,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:06:09,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:06:09,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:06:09,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:06:09,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:06:09,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:06:09,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:06:09,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:06:09,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:06:09,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:06:09,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:06:09,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:06:09,668 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:06:09,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:06:09,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:06:09,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:06:09,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:06:09,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:06:09,870 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:06:09,873 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:06:09,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2022-02-15 13:06:09,874 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2022-02-15 13:06:09,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:06:09,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:06:09,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:06:09,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:06:09,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:06:09,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,908 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:06:09,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:06:09,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:06:09,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:06:09,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:06:09,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:06:09,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:06:09,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:06:09,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:06:09,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/1) ... [2022-02-15 13:06:09,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:06:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:09,941 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) [2022-02-15 13:06:09,943 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 [2022-02-15 13:06:09,963 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 13:06:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 13:06:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 13:06:09,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 13:06:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 13:06:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 13:06:09,964 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:06:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:06:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:06:09,965 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 13:06:09,998 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:06:09,999 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:06:10,072 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:06:10,096 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:06:10,097 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 13:06:10,098 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:06:10 BoogieIcfgContainer [2022-02-15 13:06:10,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:06:10,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:06:10,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:06:10,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:06:10,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:09" (1/2) ... [2022-02-15 13:06:10,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e75a32f and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:06:10, skipping insertion in model container [2022-02-15 13:06:10,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:06:10" (2/2) ... [2022-02-15 13:06:10,107 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2022-02-15 13:06:10,115 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:06:10,115 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:06:10,115 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:06:10,115 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:06:10,168 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-15 13:06:10,226 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:06:10,238 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-15 13:06:10,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-15 13:06:10,244 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2022-02-15 13:06:10,256 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-15 13:06:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-15 13:06:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 13:06:10,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:10,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:10,262 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1080708855, now seen corresponding path program 1 times [2022-02-15 13:06:10,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:10,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946272209] [2022-02-15 13:06:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:10,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:10,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:10,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946272209] [2022-02-15 13:06:10,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946272209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:10,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:10,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:06:10,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243394780] [2022-02-15 13:06:10,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:10,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:10,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:10,497 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:10,562 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2022-02-15 13:06:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:10,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-15 13:06:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:10,570 INFO L225 Difference]: With dead ends: 61 [2022-02-15 13:06:10,570 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 13:06:10,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:10,574 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:10,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 13:06:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2022-02-15 13:06:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 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) [2022-02-15 13:06:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2022-02-15 13:06:10,626 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2022-02-15 13:06:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:10,626 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2022-02-15 13:06:10,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2022-02-15 13:06:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 13:06:10,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:10,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:10,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 13:06:10,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1086170513, now seen corresponding path program 2 times [2022-02-15 13:06:10,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:10,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898176768] [2022-02-15 13:06:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:10,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:10,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:10,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898176768] [2022-02-15 13:06:10,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898176768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:10,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:10,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:06:10,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103610188] [2022-02-15 13:06:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:10,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:10,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:10,692 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:10,738 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2022-02-15 13:06:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-15 13:06:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:10,739 INFO L225 Difference]: With dead ends: 52 [2022-02-15 13:06:10,739 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 13:06:10,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:10,740 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:10,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 13:06:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-15 13:06:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2022-02-15 13:06:10,745 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2022-02-15 13:06:10,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:10,746 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2022-02-15 13:06:10,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2022-02-15 13:06:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:10,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:10,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:10,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 13:06:10,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -831143929, now seen corresponding path program 1 times [2022-02-15 13:06:10,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:10,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690135158] [2022-02-15 13:06:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:10,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:10,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:10,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690135158] [2022-02-15 13:06:10,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690135158] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:10,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:10,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:10,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637333986] [2022-02-15 13:06:10,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:10,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:10,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:10,776 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:10,823 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2022-02-15 13:06:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:10,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:10,824 INFO L225 Difference]: With dead ends: 63 [2022-02-15 13:06:10,824 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 13:06:10,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:10,825 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:10,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 13:06:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-02-15 13:06:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 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) [2022-02-15 13:06:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2022-02-15 13:06:10,830 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2022-02-15 13:06:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:10,830 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2022-02-15 13:06:10,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2022-02-15 13:06:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:10,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:10,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:10,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 13:06:10,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1760303081, now seen corresponding path program 1 times [2022-02-15 13:06:10,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:10,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205099020] [2022-02-15 13:06:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:10,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:10,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:10,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205099020] [2022-02-15 13:06:10,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205099020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:10,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204072653] [2022-02-15 13:06:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:10,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:10,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:10,859 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) [2022-02-15 13:06:10,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 13:06:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:10,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 13:06:10,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:10,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:11,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204072653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:11,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:11,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-15 13:06:11,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381593438] [2022-02-15 13:06:11,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:11,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:06:11,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:06:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:06:11,012 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:11,068 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2022-02-15 13:06:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:11,072 INFO L225 Difference]: With dead ends: 59 [2022-02-15 13:06:11,072 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 13:06:11,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:11,081 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:11,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 13:06:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2022-02-15 13:06:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 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) [2022-02-15 13:06:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2022-02-15 13:06:11,092 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2022-02-15 13:06:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:11,092 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2022-02-15 13:06:11,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2022-02-15 13:06:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:11,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:11,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:11,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:11,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:11,294 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash -959886517, now seen corresponding path program 2 times [2022-02-15 13:06:11,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:11,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543283908] [2022-02-15 13:06:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:11,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:11,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:11,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543283908] [2022-02-15 13:06:11,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543283908] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:11,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:11,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:11,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130257783] [2022-02-15 13:06:11,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:11,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:11,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:11,326 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:11,377 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2022-02-15 13:06:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:11,379 INFO L225 Difference]: With dead ends: 80 [2022-02-15 13:06:11,379 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 13:06:11,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:11,383 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:11,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 13:06:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2022-02-15 13:06:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2022-02-15 13:06:11,386 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2022-02-15 13:06:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:11,387 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2022-02-15 13:06:11,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2022-02-15 13:06:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:11,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:11,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:11,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 13:06:11,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash -388431711, now seen corresponding path program 3 times [2022-02-15 13:06:11,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:11,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040818543] [2022-02-15 13:06:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:11,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:11,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:11,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040818543] [2022-02-15 13:06:11,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040818543] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:11,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:11,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:11,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136516115] [2022-02-15 13:06:11,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:11,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:11,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:11,419 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:11,511 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2022-02-15 13:06:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:06:11,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:11,512 INFO L225 Difference]: With dead ends: 77 [2022-02-15 13:06:11,512 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 13:06:11,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:11,512 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:11,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 41 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 13:06:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2022-02-15 13:06:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-02-15 13:06:11,515 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2022-02-15 13:06:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:11,515 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-02-15 13:06:11,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-02-15 13:06:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:11,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:11,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:11,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 13:06:11,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1974964039, now seen corresponding path program 2 times [2022-02-15 13:06:11,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:11,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403116610] [2022-02-15 13:06:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:11,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:11,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:11,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403116610] [2022-02-15 13:06:11,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403116610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:11,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241416812] [2022-02-15 13:06:11,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:11,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:11,556 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) [2022-02-15 13:06:11,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 13:06:11,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:11,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 13:06:11,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:11,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:11,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241416812] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:11,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:11,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 13:06:11,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922570341] [2022-02-15 13:06:11,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:11,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:06:11,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:06:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:11,646 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:11,690 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2022-02-15 13:06:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:11,691 INFO L225 Difference]: With dead ends: 67 [2022-02-15 13:06:11,691 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 13:06:11,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:11,691 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:11,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 13:06:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2022-02-15 13:06:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 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) [2022-02-15 13:06:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2022-02-15 13:06:11,694 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2022-02-15 13:06:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:11,694 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2022-02-15 13:06:11,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2022-02-15 13:06:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:11,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:11,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:11,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:11,910 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,SelfDestructingSolverStorable6 [2022-02-15 13:06:11,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1510372935, now seen corresponding path program 3 times [2022-02-15 13:06:11,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:11,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735358296] [2022-02-15 13:06:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:11,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:11,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:11,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735358296] [2022-02-15 13:06:11,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735358296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:11,934 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:11,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:11,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874929728] [2022-02-15 13:06:11,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:11,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:11,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:11,935 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:11,979 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2022-02-15 13:06:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:06:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:11,982 INFO L225 Difference]: With dead ends: 60 [2022-02-15 13:06:11,987 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 13:06:11,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:11,988 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:11,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 13:06:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-02-15 13:06:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2022-02-15 13:06:11,991 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2022-02-15 13:06:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:11,991 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2022-02-15 13:06:11,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2022-02-15 13:06:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:11,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:11,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:11,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 13:06:11,992 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:11,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1990959481, now seen corresponding path program 4 times [2022-02-15 13:06:11,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:11,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542840543] [2022-02-15 13:06:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:11,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:12,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542840543] [2022-02-15 13:06:12,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542840543] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:12,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:12,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:12,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480161361] [2022-02-15 13:06:12,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:12,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:12,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:12,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:12,054 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:12,096 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2022-02-15 13:06:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:12,097 INFO L225 Difference]: With dead ends: 63 [2022-02-15 13:06:12,097 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 13:06:12,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:12,105 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:12,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 13:06:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2022-02-15 13:06:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2022-02-15 13:06:12,111 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2022-02-15 13:06:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:12,112 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2022-02-15 13:06:12,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2022-02-15 13:06:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:12,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:12,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:12,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 13:06:12,112 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1228296659, now seen corresponding path program 5 times [2022-02-15 13:06:12,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:12,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124702201] [2022-02-15 13:06:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:12,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:12,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124702201] [2022-02-15 13:06:12,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124702201] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:12,161 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:12,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:12,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136565857] [2022-02-15 13:06:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:12,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:12,162 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:12,198 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2022-02-15 13:06:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:12,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:12,199 INFO L225 Difference]: With dead ends: 65 [2022-02-15 13:06:12,199 INFO L226 Difference]: Without dead ends: 65 [2022-02-15 13:06:12,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:12,200 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:12,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-15 13:06:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2022-02-15 13:06:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2022-02-15 13:06:12,211 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2022-02-15 13:06:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:12,211 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2022-02-15 13:06:12,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2022-02-15 13:06:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:12,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:12,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:12,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 13:06:12,212 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:12,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1799751465, now seen corresponding path program 6 times [2022-02-15 13:06:12,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:12,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887842912] [2022-02-15 13:06:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:12,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:12,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887842912] [2022-02-15 13:06:12,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887842912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:12,250 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:12,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:12,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687381589] [2022-02-15 13:06:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:12,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:12,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:12,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:12,251 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:12,294 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2022-02-15 13:06:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 13:06:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:12,297 INFO L225 Difference]: With dead ends: 58 [2022-02-15 13:06:12,298 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 13:06:12,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:12,298 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:12,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 13:06:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2022-02-15 13:06:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 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) [2022-02-15 13:06:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2022-02-15 13:06:12,303 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2022-02-15 13:06:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:12,303 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2022-02-15 13:06:12,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2022-02-15 13:06:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:12,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:12,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:12,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 13:06:12,304 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash -131820081, now seen corresponding path program 4 times [2022-02-15 13:06:12,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:12,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145551386] [2022-02-15 13:06:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:12,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:12,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145551386] [2022-02-15 13:06:12,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145551386] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:12,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129842000] [2022-02-15 13:06:12,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:12,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:12,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:12,341 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) [2022-02-15 13:06:12,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 13:06:12,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:12,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:12,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-15 13:06:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129842000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:12,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:12,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-15 13:06:12,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463438412] [2022-02-15 13:06:12,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:12,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 13:06:12,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 13:06:12,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:12,453 INFO L87 Difference]: Start difference. First operand 39 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:12,484 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2022-02-15 13:06:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:12,485 INFO L225 Difference]: With dead ends: 60 [2022-02-15 13:06:12,485 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 13:06:12,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:12,485 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:12,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 13:06:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2022-02-15 13:06:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 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) [2022-02-15 13:06:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2022-02-15 13:06:12,487 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2022-02-15 13:06:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:12,487 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2022-02-15 13:06:12,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2022-02-15 13:06:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:12,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:12,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:12,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:12,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:12,705 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -596411185, now seen corresponding path program 5 times [2022-02-15 13:06:12,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:12,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947101359] [2022-02-15 13:06:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:12,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:12,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947101359] [2022-02-15 13:06:12,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947101359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:12,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:12,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:12,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462785680] [2022-02-15 13:06:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:12,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:12,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:12,723 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:12,767 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2022-02-15 13:06:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:06:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:12,768 INFO L225 Difference]: With dead ends: 74 [2022-02-15 13:06:12,768 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 13:06:12,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:12,768 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:12,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 13:06:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2022-02-15 13:06:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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) [2022-02-15 13:06:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-02-15 13:06:12,770 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2022-02-15 13:06:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:12,770 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-02-15 13:06:12,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-02-15 13:06:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 13:06:12,771 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:12,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:12,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 13:06:12,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:12,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash -213690797, now seen corresponding path program 6 times [2022-02-15 13:06:12,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:12,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830787840] [2022-02-15 13:06:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:12,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:12,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830787840] [2022-02-15 13:06:12,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830787840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:12,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:12,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:12,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984053473] [2022-02-15 13:06:12,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:12,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:12,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:12,790 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:12,818 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2022-02-15 13:06:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-15 13:06:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:12,819 INFO L225 Difference]: With dead ends: 44 [2022-02-15 13:06:12,819 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 13:06:12,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:12,820 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:12,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:12,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 13:06:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-15 13:06:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 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) [2022-02-15 13:06:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2022-02-15 13:06:12,822 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2022-02-15 13:06:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:12,822 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2022-02-15 13:06:12,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2022-02-15 13:06:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:06:12,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:12,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 13:06:12,823 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1291799271, now seen corresponding path program 1 times [2022-02-15 13:06:12,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:12,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326316229] [2022-02-15 13:06:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:12,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:12,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:12,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326316229] [2022-02-15 13:06:12,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326316229] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:12,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946404179] [2022-02-15 13:06:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:12,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:12,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:12,935 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) [2022-02-15 13:06:12,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 13:06:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:12,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:06:12,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:13,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:13,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946404179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:13,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:13,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-15 13:06:13,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127861526] [2022-02-15 13:06:13,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:13,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:13,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:13,285 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:13,367 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2022-02-15 13:06:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:06:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:13,368 INFO L225 Difference]: With dead ends: 61 [2022-02-15 13:06:13,368 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 13:06:13,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:13,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:13,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 13:06:13,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-02-15 13:06:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2022-02-15 13:06:13,375 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2022-02-15 13:06:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:13,375 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2022-02-15 13:06:13,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:13,375 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2022-02-15 13:06:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:06:13,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:13,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:13,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:13,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-15 13:06:13,599 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:13,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1163056683, now seen corresponding path program 2 times [2022-02-15 13:06:13,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:13,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664946866] [2022-02-15 13:06:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:13,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:13,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:13,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664946866] [2022-02-15 13:06:13,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664946866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:13,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101684428] [2022-02-15 13:06:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:13,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:13,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:13,656 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) [2022-02-15 13:06:13,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 13:06:13,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:06:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:13,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:13,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101684428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:13,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:13,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-02-15 13:06:13,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377123555] [2022-02-15 13:06:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:13,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:13,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:13,929 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:14,001 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2022-02-15 13:06:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:14,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:06:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:14,003 INFO L225 Difference]: With dead ends: 76 [2022-02-15 13:06:14,003 INFO L226 Difference]: Without dead ends: 69 [2022-02-15 13:06:14,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:14,003 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:14,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-15 13:06:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-02-15 13:06:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2022-02-15 13:06:14,006 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2022-02-15 13:06:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2022-02-15 13:06:14,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2022-02-15 13:06:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:06:14,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:14,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:14,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:14,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-15 13:06:14,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1517207889, now seen corresponding path program 3 times [2022-02-15 13:06:14,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:14,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277449728] [2022-02-15 13:06:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:14,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:14,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:14,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277449728] [2022-02-15 13:06:14,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277449728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:14,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675500488] [2022-02-15 13:06:14,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:14,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:14,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:14,318 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) [2022-02-15 13:06:14,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 13:06:14,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:06:14,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:14,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:14,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675500488] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:14,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:14,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-02-15 13:06:14,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314763322] [2022-02-15 13:06:14,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:14,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:14,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:14,591 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:14,657 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2022-02-15 13:06:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:06:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:14,659 INFO L225 Difference]: With dead ends: 64 [2022-02-15 13:06:14,659 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 13:06:14,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:14,660 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:14,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 58 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 13:06:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-02-15 13:06:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2022-02-15 13:06:14,664 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2022-02-15 13:06:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:14,664 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2022-02-15 13:06:14,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2022-02-15 13:06:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:06:14,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:14,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:14,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:14,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-15 13:06:14,876 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash 110977511, now seen corresponding path program 4 times [2022-02-15 13:06:14,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:14,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050868903] [2022-02-15 13:06:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:14,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:14,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:14,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050868903] [2022-02-15 13:06:14,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050868903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:14,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486973452] [2022-02-15 13:06:14,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:14,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:14,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:14,939 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) [2022-02-15 13:06:14,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 13:06:14,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:06:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:15,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:15,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486973452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:15,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:15,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-02-15 13:06:15,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709646217] [2022-02-15 13:06:15,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:15,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:15,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:15,187 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:15,270 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2022-02-15 13:06:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:06:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:15,271 INFO L225 Difference]: With dead ends: 80 [2022-02-15 13:06:15,271 INFO L226 Difference]: Without dead ends: 73 [2022-02-15 13:06:15,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:15,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:15,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 82 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-15 13:06:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2022-02-15 13:06:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2022-02-15 13:06:15,273 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2022-02-15 13:06:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:15,274 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2022-02-15 13:06:15,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2022-02-15 13:06:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:06:15,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:15,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:15,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:15,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:15,489 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1725680235, now seen corresponding path program 5 times [2022-02-15 13:06:15,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:15,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615139162] [2022-02-15 13:06:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:15,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:15,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:15,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615139162] [2022-02-15 13:06:15,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615139162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:15,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631304789] [2022-02-15 13:06:15,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:15,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:15,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:15,555 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) [2022-02-15 13:06:15,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 13:06:15,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:15,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:06:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:15,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:15,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631304789] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:15,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:15,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-02-15 13:06:15,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221842716] [2022-02-15 13:06:15,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:15,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:15,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:15,809 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:15,886 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2022-02-15 13:06:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:06:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:15,887 INFO L225 Difference]: With dead ends: 82 [2022-02-15 13:06:15,887 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 13:06:15,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:15,888 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:15,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 83 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 13:06:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2022-02-15 13:06:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2022-02-15 13:06:15,890 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2022-02-15 13:06:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:15,890 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2022-02-15 13:06:15,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2022-02-15 13:06:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:06:15,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:15,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:15,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:16,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:16,108 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash -353613593, now seen corresponding path program 6 times [2022-02-15 13:06:16,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:16,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296602975] [2022-02-15 13:06:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:16,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:16,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:16,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296602975] [2022-02-15 13:06:16,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296602975] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:16,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30286145] [2022-02-15 13:06:16,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:16,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:16,163 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) [2022-02-15 13:06:16,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 13:06:16,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 13:06:16,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-15 13:06:16,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:16,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:16,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30286145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:16,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:16,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-15 13:06:16,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365951203] [2022-02-15 13:06:16,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:16,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:16,399 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:16,465 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2022-02-15 13:06:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:16,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:06:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:16,466 INFO L225 Difference]: With dead ends: 67 [2022-02-15 13:06:16,466 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 13:06:16,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:16,467 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:16,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 74 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 13:06:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-02-15 13:06:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2022-02-15 13:06:16,469 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2022-02-15 13:06:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:16,469 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2022-02-15 13:06:16,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2022-02-15 13:06:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:16,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:16,469 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:16,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:16,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:16,683 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1417691671, now seen corresponding path program 7 times [2022-02-15 13:06:16,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:16,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561784408] [2022-02-15 13:06:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:16,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:16,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:16,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561784408] [2022-02-15 13:06:16,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561784408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:16,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026612816] [2022-02-15 13:06:16,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:16,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:16,711 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) [2022-02-15 13:06:16,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 13:06:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:16,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:16,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:16,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026612816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:16,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:16,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-15 13:06:16,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696626555] [2022-02-15 13:06:16,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:16,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:06:16,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:16,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:06:16,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:16,798 INFO L87 Difference]: Start difference. First operand 58 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:16,875 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2022-02-15 13:06:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:06:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 16 [2022-02-15 13:06:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:16,876 INFO L225 Difference]: With dead ends: 84 [2022-02-15 13:06:16,876 INFO L226 Difference]: Without dead ends: 73 [2022-02-15 13:06:16,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:16,877 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:16,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 75 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-15 13:06:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-02-15 13:06:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2022-02-15 13:06:16,879 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2022-02-15 13:06:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:16,879 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2022-02-15 13:06:16,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2022-02-15 13:06:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:16,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:16,879 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:16,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:17,091 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,SelfDestructingSolverStorable20 [2022-02-15 13:06:17,091 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1616438265, now seen corresponding path program 8 times [2022-02-15 13:06:17,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:17,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782012331] [2022-02-15 13:06:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:17,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:17,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:17,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782012331] [2022-02-15 13:06:17,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782012331] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:17,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761314377] [2022-02-15 13:06:17,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:17,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:17,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:17,114 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) [2022-02-15 13:06:17,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 13:06:17,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:17,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:17,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:17,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:17,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761314377] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:17,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:17,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-15 13:06:17,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390568653] [2022-02-15 13:06:17,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:17,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:06:17,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:06:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:17,206 INFO L87 Difference]: Start difference. First operand 53 states and 103 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:17,255 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2022-02-15 13:06:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 16 [2022-02-15 13:06:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:17,256 INFO L225 Difference]: With dead ends: 81 [2022-02-15 13:06:17,256 INFO L226 Difference]: Without dead ends: 81 [2022-02-15 13:06:17,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:17,257 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:17,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-15 13:06:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-02-15 13:06:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2022-02-15 13:06:17,258 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2022-02-15 13:06:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2022-02-15 13:06:17,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2022-02-15 13:06:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:17,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:17,259 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:17,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:17,475 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,SelfDestructingSolverStorable21 [2022-02-15 13:06:17,475 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1437143285, now seen corresponding path program 9 times [2022-02-15 13:06:17,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:17,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490294583] [2022-02-15 13:06:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:17,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:17,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:17,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490294583] [2022-02-15 13:06:17,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490294583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:17,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155203902] [2022-02-15 13:06:17,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:17,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:17,500 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) [2022-02-15 13:06:17,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 13:06:17,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:17,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:17,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:17,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155203902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:17,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:17,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:17,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345555868] [2022-02-15 13:06:17,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:17,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:17,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:17,598 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:17,710 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2022-02-15 13:06:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:06:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:17,711 INFO L225 Difference]: With dead ends: 154 [2022-02-15 13:06:17,711 INFO L226 Difference]: Without dead ends: 154 [2022-02-15 13:06:17,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:17,712 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:17,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 111 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-15 13:06:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2022-02-15 13:06:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2022-02-15 13:06:17,714 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2022-02-15 13:06:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:17,714 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2022-02-15 13:06:17,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2022-02-15 13:06:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:17,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:17,715 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:17,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:17,927 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,SelfDestructingSolverStorable22 [2022-02-15 13:06:17,927 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -865688479, now seen corresponding path program 10 times [2022-02-15 13:06:17,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:17,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433299498] [2022-02-15 13:06:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:17,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:17,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:17,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433299498] [2022-02-15 13:06:17,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433299498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:17,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849659073] [2022-02-15 13:06:17,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:17,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:17,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:17,957 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) [2022-02-15 13:06:17,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 13:06:17,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:17,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:17,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849659073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:18,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:18,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:18,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166279146] [2022-02-15 13:06:18,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:18,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:18,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:18,055 INFO L87 Difference]: Start difference. First operand 62 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:18,195 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2022-02-15 13:06:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:06:18,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:18,196 INFO L225 Difference]: With dead ends: 157 [2022-02-15 13:06:18,196 INFO L226 Difference]: Without dead ends: 154 [2022-02-15 13:06:18,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:18,196 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:18,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 81 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-15 13:06:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2022-02-15 13:06:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2022-02-15 13:06:18,198 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2022-02-15 13:06:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:18,199 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2022-02-15 13:06:18,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2022-02-15 13:06:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:18,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:18,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:18,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:18,415 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,SelfDestructingSolverStorable23 [2022-02-15 13:06:18,416 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1497707271, now seen corresponding path program 11 times [2022-02-15 13:06:18,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:18,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623828519] [2022-02-15 13:06:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:18,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:18,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623828519] [2022-02-15 13:06:18,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623828519] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:18,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455513923] [2022-02-15 13:06:18,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:18,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:18,447 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) [2022-02-15 13:06:18,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 13:06:18,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:18,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:18,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455513923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:18,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:18,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:18,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815279531] [2022-02-15 13:06:18,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:18,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:18,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:18,545 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:18,640 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2022-02-15 13:06:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:18,641 INFO L225 Difference]: With dead ends: 160 [2022-02-15 13:06:18,641 INFO L226 Difference]: Without dead ends: 160 [2022-02-15 13:06:18,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:18,641 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:18,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 67 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-15 13:06:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2022-02-15 13:06:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.217391304347826) internal successors, (153), 69 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2022-02-15 13:06:18,644 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2022-02-15 13:06:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:18,644 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2022-02-15 13:06:18,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2022-02-15 13:06:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:18,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:18,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:18,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:18,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:18,861 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:18,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1033116167, now seen corresponding path program 12 times [2022-02-15 13:06:18,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:18,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823468598] [2022-02-15 13:06:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:18,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:18,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823468598] [2022-02-15 13:06:18,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823468598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:18,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613320849] [2022-02-15 13:06:18,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:18,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:18,886 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) [2022-02-15 13:06:18,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 13:06:18,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:18,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:18,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613320849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:18,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:18,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:18,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614583917] [2022-02-15 13:06:18,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:18,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:18,982 INFO L87 Difference]: Start difference. First operand 70 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:19,112 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2022-02-15 13:06:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:06:19,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:19,113 INFO L225 Difference]: With dead ends: 114 [2022-02-15 13:06:19,113 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 13:06:19,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:19,114 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:19,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 55 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 13:06:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2022-02-15 13:06:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2022-02-15 13:06:19,116 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2022-02-15 13:06:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2022-02-15 13:06:19,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2022-02-15 13:06:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:19,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:19,116 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:19,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:19,317 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,SelfDestructingSolverStorable25 [2022-02-15 13:06:19,317 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash -330458677, now seen corresponding path program 13 times [2022-02-15 13:06:19,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:19,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346428720] [2022-02-15 13:06:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:19,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:19,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:19,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346428720] [2022-02-15 13:06:19,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346428720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:19,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297092862] [2022-02-15 13:06:19,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:19,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:19,342 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) [2022-02-15 13:06:19,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 13:06:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:19,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:19,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297092862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:19,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:19,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:19,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212768471] [2022-02-15 13:06:19,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:19,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:19,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:19,457 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:19,575 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2022-02-15 13:06:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:06:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:19,576 INFO L225 Difference]: With dead ends: 132 [2022-02-15 13:06:19,576 INFO L226 Difference]: Without dead ends: 126 [2022-02-15 13:06:19,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:06:19,576 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:19,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 77 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-15 13:06:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2022-02-15 13:06:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2022-02-15 13:06:19,579 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2022-02-15 13:06:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:19,579 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2022-02-15 13:06:19,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2022-02-15 13:06:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:19,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:19,579 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:19,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:19,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-15 13:06:19,780 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1051975989, now seen corresponding path program 14 times [2022-02-15 13:06:19,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:19,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894568666] [2022-02-15 13:06:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:19,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:19,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:19,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894568666] [2022-02-15 13:06:19,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894568666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:19,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916130237] [2022-02-15 13:06:19,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:19,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:19,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:19,804 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) [2022-02-15 13:06:19,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 13:06:19,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:19,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:19,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:19,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916130237] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:19,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:19,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-15 13:06:19,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730112045] [2022-02-15 13:06:19,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:19,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:19,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:19,907 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:20,019 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2022-02-15 13:06:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:20,020 INFO L225 Difference]: With dead ends: 186 [2022-02-15 13:06:20,020 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 13:06:20,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:20,021 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:20,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 88 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 13:06:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2022-02-15 13:06:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2022-02-15 13:06:20,023 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2022-02-15 13:06:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:20,023 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2022-02-15 13:06:20,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2022-02-15 13:06:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:20,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:20,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:20,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:20,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-15 13:06:20,225 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1516567093, now seen corresponding path program 15 times [2022-02-15 13:06:20,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:20,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281181166] [2022-02-15 13:06:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:20,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:20,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:20,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281181166] [2022-02-15 13:06:20,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281181166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:20,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232094401] [2022-02-15 13:06:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:20,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:20,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:20,247 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) [2022-02-15 13:06:20,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 13:06:20,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:06:20,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:20,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:20,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:20,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:20,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232094401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:20,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:20,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-15 13:06:20,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198510739] [2022-02-15 13:06:20,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:20,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:20,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:20,350 INFO L87 Difference]: Start difference. First operand 84 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2022-02-15 13:06:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:20,482 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2022-02-15 13:06:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:06:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 16 [2022-02-15 13:06:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:20,483 INFO L225 Difference]: With dead ends: 157 [2022-02-15 13:06:20,483 INFO L226 Difference]: Without dead ends: 155 [2022-02-15 13:06:20,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:06:20,484 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:20,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 63 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-15 13:06:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2022-02-15 13:06:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2022-02-15 13:06:20,486 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2022-02-15 13:06:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:20,486 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2022-02-15 13:06:20,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2022-02-15 13:06:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2022-02-15 13:06:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:20,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:20,488 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:20,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:20,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-15 13:06:20,698 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:20,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1550166321, now seen corresponding path program 16 times [2022-02-15 13:06:20,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:20,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149995983] [2022-02-15 13:06:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:20,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:20,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:20,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149995983] [2022-02-15 13:06:20,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149995983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:20,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107806221] [2022-02-15 13:06:20,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:20,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:20,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:20,735 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) [2022-02-15 13:06:20,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 13:06:20,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:20,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:20,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107806221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:20,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:20,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-15 13:06:20,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776016049] [2022-02-15 13:06:20,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:20,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:06:20,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:06:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:06:20,845 INFO L87 Difference]: Start difference. First operand 84 states and 191 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2022-02-15 13:06:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:20,994 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2022-02-15 13:06:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:06:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2022-02-15 13:06:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:20,995 INFO L225 Difference]: With dead ends: 146 [2022-02-15 13:06:20,995 INFO L226 Difference]: Without dead ends: 142 [2022-02-15 13:06:20,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:06:20,996 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:20,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 85 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-15 13:06:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2022-02-15 13:06:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2022-02-15 13:06:20,999 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2022-02-15 13:06:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:20,999 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2022-02-15 13:06:20,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2022-02-15 13:06:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2022-02-15 13:06:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:21,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:21,000 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:21,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-15 13:06:21,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:21,233 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1574395569, now seen corresponding path program 17 times [2022-02-15 13:06:21,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:21,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774391219] [2022-02-15 13:06:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:21,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:21,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:21,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774391219] [2022-02-15 13:06:21,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774391219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:21,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115100898] [2022-02-15 13:06:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:21,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:21,268 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) [2022-02-15 13:06:21,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 13:06:21,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:21,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:21,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:21,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115100898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:21,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:21,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-15 13:06:21,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690637663] [2022-02-15 13:06:21,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:06:21,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:06:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:21,344 INFO L87 Difference]: Start difference. First operand 94 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:21,398 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2022-02-15 13:06:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 16 [2022-02-15 13:06:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:21,399 INFO L225 Difference]: With dead ends: 128 [2022-02-15 13:06:21,399 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 13:06:21,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:21,399 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:21,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 13:06:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2022-02-15 13:06:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.391304347826087) internal successors, (220), 92 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2022-02-15 13:06:21,402 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2022-02-15 13:06:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:21,402 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2022-02-15 13:06:21,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2022-02-15 13:06:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:21,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:21,402 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:21,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:21,619 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,SelfDestructingSolverStorable30 [2022-02-15 13:06:21,619 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash -561703037, now seen corresponding path program 18 times [2022-02-15 13:06:21,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:21,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915929587] [2022-02-15 13:06:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:21,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:21,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:21,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915929587] [2022-02-15 13:06:21,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915929587] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:21,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811286067] [2022-02-15 13:06:21,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:21,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:21,648 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) [2022-02-15 13:06:21,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 13:06:21,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:21,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:21,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:21,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811286067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:21,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:21,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:21,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963335189] [2022-02-15 13:06:21,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:21,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:21,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:21,735 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:21,828 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2022-02-15 13:06:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:06:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:21,829 INFO L225 Difference]: With dead ends: 128 [2022-02-15 13:06:21,829 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 13:06:21,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:21,830 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:21,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 13:06:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2022-02-15 13:06:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.422680412371134) internal successors, (235), 97 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2022-02-15 13:06:21,832 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2022-02-15 13:06:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:21,832 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2022-02-15 13:06:21,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2022-02-15 13:06:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:21,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:21,833 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:21,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:22,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:22,047 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1584467723, now seen corresponding path program 19 times [2022-02-15 13:06:22,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:22,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840150747] [2022-02-15 13:06:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:22,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:22,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:22,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840150747] [2022-02-15 13:06:22,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840150747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:22,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392042775] [2022-02-15 13:06:22,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:22,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:22,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:22,081 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) [2022-02-15 13:06:22,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 13:06:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:22,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:22,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392042775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:22,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:22,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:22,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385094666] [2022-02-15 13:06:22,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:22,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:22,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:22,163 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:22,252 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2022-02-15 13:06:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:22,253 INFO L225 Difference]: With dead ends: 175 [2022-02-15 13:06:22,253 INFO L226 Difference]: Without dead ends: 175 [2022-02-15 13:06:22,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:22,253 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:22,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 76 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:22,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-15 13:06:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2022-02-15 13:06:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.46) internal successors, (246), 100 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2022-02-15 13:06:22,256 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2022-02-15 13:06:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:22,256 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2022-02-15 13:06:22,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2022-02-15 13:06:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:22,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:22,257 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:22,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:22,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:22,475 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2139044767, now seen corresponding path program 20 times [2022-02-15 13:06:22,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:22,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411512280] [2022-02-15 13:06:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:22,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:22,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:22,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411512280] [2022-02-15 13:06:22,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411512280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:22,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337374782] [2022-02-15 13:06:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:22,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:22,499 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) [2022-02-15 13:06:22,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:22,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:22,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 13:06:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:22,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:22,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337374782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:22,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:22,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:22,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148579963] [2022-02-15 13:06:22,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:22,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:22,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:22,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:22,588 INFO L87 Difference]: Start difference. First operand 101 states and 246 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:22,716 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2022-02-15 13:06:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:06:22,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:22,717 INFO L225 Difference]: With dead ends: 143 [2022-02-15 13:06:22,717 INFO L226 Difference]: Without dead ends: 137 [2022-02-15 13:06:22,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:22,718 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:22,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 62 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-15 13:06:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2022-02-15 13:06:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4329896907216493) internal successors, (236), 97 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2022-02-15 13:06:22,720 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2022-02-15 13:06:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:22,721 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2022-02-15 13:06:22,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2022-02-15 13:06:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:22,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:22,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:22,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:22,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:22,931 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash 224350983, now seen corresponding path program 21 times [2022-02-15 13:06:22,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:22,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378335312] [2022-02-15 13:06:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:22,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:22,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:22,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378335312] [2022-02-15 13:06:22,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378335312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:22,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30522514] [2022-02-15 13:06:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:22,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:22,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:22,959 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) [2022-02-15 13:06:22,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 13:06:22,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:22,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:22,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:22,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30522514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:23,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:23,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:23,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504332294] [2022-02-15 13:06:23,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:23,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:23,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:23,052 INFO L87 Difference]: Start difference. First operand 98 states and 236 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:23,147 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2022-02-15 13:06:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:06:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:23,148 INFO L225 Difference]: With dead ends: 189 [2022-02-15 13:06:23,148 INFO L226 Difference]: Without dead ends: 189 [2022-02-15 13:06:23,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:23,148 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:23,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 81 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-15 13:06:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2022-02-15 13:06:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 105 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2022-02-15 13:06:23,151 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2022-02-15 13:06:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:23,151 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2022-02-15 13:06:23,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2022-02-15 13:06:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:23,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:23,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:23,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:23,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:23,367 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -240240121, now seen corresponding path program 22 times [2022-02-15 13:06:23,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:23,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660189563] [2022-02-15 13:06:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:23,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:23,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660189563] [2022-02-15 13:06:23,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660189563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:23,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438726903] [2022-02-15 13:06:23,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:23,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:23,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:23,391 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) [2022-02-15 13:06:23,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 13:06:23,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:23,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438726903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:23,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:23,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:23,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745942204] [2022-02-15 13:06:23,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:23,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:23,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:23,496 INFO L87 Difference]: Start difference. First operand 106 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:23,625 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2022-02-15 13:06:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:06:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:23,626 INFO L225 Difference]: With dead ends: 179 [2022-02-15 13:06:23,627 INFO L226 Difference]: Without dead ends: 177 [2022-02-15 13:06:23,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:23,627 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:23,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 77 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-15 13:06:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2022-02-15 13:06:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.44) internal successors, (244), 100 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2022-02-15 13:06:23,630 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2022-02-15 13:06:23,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:23,630 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2022-02-15 13:06:23,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2022-02-15 13:06:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:23,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:23,630 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:23,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:23,843 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,SelfDestructingSolverStorable35 [2022-02-15 13:06:23,843 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash -273839349, now seen corresponding path program 23 times [2022-02-15 13:06:23,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:23,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214267373] [2022-02-15 13:06:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:23,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:23,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214267373] [2022-02-15 13:06:23,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214267373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:23,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157541955] [2022-02-15 13:06:23,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:23,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:23,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:23,867 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) [2022-02-15 13:06:23,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 13:06:23,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:23,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:23,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157541955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:23,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:23,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 13:06:23,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612352726] [2022-02-15 13:06:23,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:23,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:23,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:23,953 INFO L87 Difference]: Start difference. First operand 101 states and 244 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:24,053 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2022-02-15 13:06:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:06:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:24,053 INFO L225 Difference]: With dead ends: 150 [2022-02-15 13:06:24,053 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 13:06:24,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:06:24,054 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:24,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 69 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:24,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 13:06:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2022-02-15 13:06:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.42) internal successors, (242), 100 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2022-02-15 13:06:24,056 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2022-02-15 13:06:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:24,057 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2022-02-15 13:06:24,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2022-02-15 13:06:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:24,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:24,057 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:24,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:24,271 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,SelfDestructingSolverStorable36 [2022-02-15 13:06:24,272 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1294409209, now seen corresponding path program 24 times [2022-02-15 13:06:24,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:24,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49424196] [2022-02-15 13:06:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:24,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:24,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:24,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49424196] [2022-02-15 13:06:24,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49424196] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:24,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630066099] [2022-02-15 13:06:24,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:24,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:24,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:24,296 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) [2022-02-15 13:06:24,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 13:06:24,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 13:06:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:24,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:24,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630066099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:24,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:24,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-15 13:06:24,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125443824] [2022-02-15 13:06:24,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:24,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:06:24,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:06:24,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:24,383 INFO L87 Difference]: Start difference. First operand 101 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:24,440 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2022-02-15 13:06:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:06:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 16 [2022-02-15 13:06:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:24,441 INFO L225 Difference]: With dead ends: 114 [2022-02-15 13:06:24,441 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 13:06:24,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:24,442 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:24,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 56 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 13:06:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2022-02-15 13:06:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2022-02-15 13:06:24,444 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2022-02-15 13:06:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:24,444 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2022-02-15 13:06:24,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-02-15 13:06:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2022-02-15 13:06:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:24,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:24,444 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:24,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:24,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-15 13:06:24,645 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 766994383, now seen corresponding path program 25 times [2022-02-15 13:06:24,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:24,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769455435] [2022-02-15 13:06:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:24,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:24,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:24,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769455435] [2022-02-15 13:06:24,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769455435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:24,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474171393] [2022-02-15 13:06:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:24,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:24,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:24,688 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) [2022-02-15 13:06:24,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 13:06:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:24,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:24,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474171393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:24,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:24,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-15 13:06:24,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419801902] [2022-02-15 13:06:24,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:24,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:06:24,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:06:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:06:24,780 INFO L87 Difference]: Start difference. First operand 101 states and 241 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:24,899 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2022-02-15 13:06:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:06:24,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:24,900 INFO L225 Difference]: With dead ends: 167 [2022-02-15 13:06:24,900 INFO L226 Difference]: Without dead ends: 167 [2022-02-15 13:06:24,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:24,901 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:24,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 87 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-15 13:06:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2022-02-15 13:06:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.436893203883495) internal successors, (251), 103 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2022-02-15 13:06:24,903 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2022-02-15 13:06:24,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:24,904 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2022-02-15 13:06:24,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2022-02-15 13:06:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:24,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:24,904 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:24,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:25,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-15 13:06:25,119 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 724981967, now seen corresponding path program 26 times [2022-02-15 13:06:25,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:25,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239324506] [2022-02-15 13:06:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:25,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:25,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:25,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239324506] [2022-02-15 13:06:25,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239324506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:25,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139458694] [2022-02-15 13:06:25,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:25,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:25,141 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) [2022-02-15 13:06:25,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 13:06:25,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:25,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:25,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:25,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139458694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:25,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:25,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-15 13:06:25,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382224869] [2022-02-15 13:06:25,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:25,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:25,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:25,228 INFO L87 Difference]: Start difference. First operand 104 states and 251 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:25,315 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2022-02-15 13:06:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:25,316 INFO L225 Difference]: With dead ends: 217 [2022-02-15 13:06:25,316 INFO L226 Difference]: Without dead ends: 217 [2022-02-15 13:06:25,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:25,317 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:25,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 74 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-15 13:06:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2022-02-15 13:06:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.526315789473684) internal successors, (288), 114 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2022-02-15 13:06:25,319 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2022-02-15 13:06:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:25,319 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2022-02-15 13:06:25,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2022-02-15 13:06:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:25,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:25,320 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:25,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:25,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-15 13:06:25,523 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1296436773, now seen corresponding path program 27 times [2022-02-15 13:06:25,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:25,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606115999] [2022-02-15 13:06:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:25,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:25,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:25,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606115999] [2022-02-15 13:06:25,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606115999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:25,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214823015] [2022-02-15 13:06:25,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:25,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:25,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:25,544 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) [2022-02-15 13:06:25,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 13:06:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:06:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:25,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:25,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214823015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:25,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:25,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-15 13:06:25,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758795542] [2022-02-15 13:06:25,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:25,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:06:25,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:25,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:06:25,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:06:25,635 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:25,773 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2022-02-15 13:06:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:06:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:25,774 INFO L225 Difference]: With dead ends: 201 [2022-02-15 13:06:25,774 INFO L226 Difference]: Without dead ends: 198 [2022-02-15 13:06:25,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:06:25,774 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:25,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 65 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-15 13:06:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2022-02-15 13:06:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2022-02-15 13:06:25,777 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2022-02-15 13:06:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:25,777 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2022-02-15 13:06:25,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2022-02-15 13:06:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 13:06:25,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:25,778 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:25,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-15 13:06:25,994 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,SelfDestructingSolverStorable40 [2022-02-15 13:06:25,994 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1831666575, now seen corresponding path program 28 times [2022-02-15 13:06:25,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:25,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062717979] [2022-02-15 13:06:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:25,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:26,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:26,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062717979] [2022-02-15 13:06:26,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062717979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:26,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903305367] [2022-02-15 13:06:26,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:26,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:26,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:26,031 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) [2022-02-15 13:06:26,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 13:06:26,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:26,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-15 13:06:26,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:26,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:26,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903305367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:26,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:26,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-15 13:06:26,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112449708] [2022-02-15 13:06:26,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:06:26,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:06:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:06:26,125 INFO L87 Difference]: Start difference. First operand 109 states and 265 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:26,255 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2022-02-15 13:06:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:06:26,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-15 13:06:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:26,256 INFO L225 Difference]: With dead ends: 183 [2022-02-15 13:06:26,256 INFO L226 Difference]: Without dead ends: 177 [2022-02-15 13:06:26,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:06:26,257 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:26,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 70 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-15 13:06:26,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2022-02-15 13:06:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4958677685950414) internal successors, (302), 121 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2022-02-15 13:06:26,259 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2022-02-15 13:06:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:26,259 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2022-02-15 13:06:26,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:26,260 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2022-02-15 13:06:26,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:26,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:26,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:26,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-15 13:06:26,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:26,479 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1456641271, now seen corresponding path program 29 times [2022-02-15 13:06:26,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:26,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955645635] [2022-02-15 13:06:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:26,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:26,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:26,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955645635] [2022-02-15 13:06:26,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955645635] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:26,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515429632] [2022-02-15 13:06:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:26,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:26,566 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) [2022-02-15 13:06:26,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 13:06:26,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:26,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:26,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:26,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515429632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:26,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:26,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:06:26,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924868012] [2022-02-15 13:06:26,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:26,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:26,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:26,885 INFO L87 Difference]: Start difference. First operand 122 states and 302 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:27,081 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2022-02-15 13:06:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:27,082 INFO L225 Difference]: With dead ends: 223 [2022-02-15 13:06:27,082 INFO L226 Difference]: Without dead ends: 203 [2022-02-15 13:06:27,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:06:27,082 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 83 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:27,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 201 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-15 13:06:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2022-02-15 13:06:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.475177304964539) internal successors, (349), 141 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2022-02-15 13:06:27,085 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2022-02-15 13:06:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:27,085 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2022-02-15 13:06:27,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2022-02-15 13:06:27,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:27,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:27,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:27,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:27,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:27,299 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1398193685, now seen corresponding path program 30 times [2022-02-15 13:06:27,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:27,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136887829] [2022-02-15 13:06:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:27,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:27,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:27,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136887829] [2022-02-15 13:06:27,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136887829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:27,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293058843] [2022-02-15 13:06:27,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:27,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:27,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:27,376 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) [2022-02-15 13:06:27,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 13:06:27,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:27,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:27,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:27,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:27,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293058843] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:27,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:27,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:06:27,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201000812] [2022-02-15 13:06:27,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:27,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:27,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:27,688 INFO L87 Difference]: Start difference. First operand 142 states and 349 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:27,855 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2022-02-15 13:06:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:06:27,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:27,856 INFO L225 Difference]: With dead ends: 253 [2022-02-15 13:06:27,856 INFO L226 Difference]: Without dead ends: 246 [2022-02-15 13:06:27,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:27,857 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:27,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 245 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-15 13:06:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2022-02-15 13:06:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.527027027027027) internal successors, (374), 148 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) [2022-02-15 13:06:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2022-02-15 13:06:27,860 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2022-02-15 13:06:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:27,860 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2022-02-15 13:06:27,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2022-02-15 13:06:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:27,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:27,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:27,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:28,071 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,SelfDestructingSolverStorable43 [2022-02-15 13:06:28,071 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash 216509039, now seen corresponding path program 31 times [2022-02-15 13:06:28,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:28,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093751825] [2022-02-15 13:06:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:28,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:28,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:28,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093751825] [2022-02-15 13:06:28,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093751825] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:28,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737187459] [2022-02-15 13:06:28,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:28,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:28,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:28,154 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) [2022-02-15 13:06:28,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 13:06:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:28,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:28,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737187459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:28,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:28,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:06:28,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487348613] [2022-02-15 13:06:28,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:28,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:28,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:28,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:28,464 INFO L87 Difference]: Start difference. First operand 149 states and 374 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 13:06:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:28,633 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2022-02-15 13:06:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:06:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 17 [2022-02-15 13:06:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:28,634 INFO L225 Difference]: With dead ends: 239 [2022-02-15 13:06:28,634 INFO L226 Difference]: Without dead ends: 223 [2022-02-15 13:06:28,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:28,634 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:28,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 212 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-15 13:06:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2022-02-15 13:06:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2022-02-15 13:06:28,638 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2022-02-15 13:06:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:28,638 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2022-02-15 13:06:28,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 13:06:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2022-02-15 13:06:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:28,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:28,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:28,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-15 13:06:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:28,851 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash -826738879, now seen corresponding path program 32 times [2022-02-15 13:06:28,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:28,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378438517] [2022-02-15 13:06:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:28,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:28,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:28,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378438517] [2022-02-15 13:06:28,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378438517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:28,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269418789] [2022-02-15 13:06:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:28,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:28,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:28,927 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) [2022-02-15 13:06:28,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 13:06:28,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:28,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:28,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:29,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:29,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269418789] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:29,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:29,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:06:29,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232351525] [2022-02-15 13:06:29,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:29,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:06:29,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:06:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:29,230 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:29,399 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2022-02-15 13:06:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:06:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:29,400 INFO L225 Difference]: With dead ends: 224 [2022-02-15 13:06:29,400 INFO L226 Difference]: Without dead ends: 217 [2022-02-15 13:06:29,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:06:29,401 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:29,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 221 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-15 13:06:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2022-02-15 13:06:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2022-02-15 13:06:29,404 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2022-02-15 13:06:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:29,404 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2022-02-15 13:06:29,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2022-02-15 13:06:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:29,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:29,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:29,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:29,623 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,SelfDestructingSolverStorable45 [2022-02-15 13:06:29,623 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1799080409, now seen corresponding path program 33 times [2022-02-15 13:06:29,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:29,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465629478] [2022-02-15 13:06:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:29,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:29,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:29,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465629478] [2022-02-15 13:06:29,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465629478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:29,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897250269] [2022-02-15 13:06:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:29,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:29,693 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) [2022-02-15 13:06:29,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 13:06:29,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:29,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:29,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:30,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897250269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:30,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:30,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-15 13:06:30,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339131556] [2022-02-15 13:06:30,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:30,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:30,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:30,005 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2022-02-15 13:06:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:30,130 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2022-02-15 13:06:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:06:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 17 [2022-02-15 13:06:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:30,131 INFO L225 Difference]: With dead ends: 218 [2022-02-15 13:06:30,131 INFO L226 Difference]: Without dead ends: 211 [2022-02-15 13:06:30,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:06:30,131 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:30,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 151 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-15 13:06:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2022-02-15 13:06:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.551282051282051) internal successors, (398), 156 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2022-02-15 13:06:30,134 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2022-02-15 13:06:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:30,134 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2022-02-15 13:06:30,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2022-02-15 13:06:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2022-02-15 13:06:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:30,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:30,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:30,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:30,343 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -184377685, now seen corresponding path program 34 times [2022-02-15 13:06:30,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:30,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481506002] [2022-02-15 13:06:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:30,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:30,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:30,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481506002] [2022-02-15 13:06:30,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481506002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:30,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784888767] [2022-02-15 13:06:30,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:30,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:30,418 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) [2022-02-15 13:06:30,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 13:06:30,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:30,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:30,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:30,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:30,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:30,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784888767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:30,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:30,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-15 13:06:30,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052442960] [2022-02-15 13:06:30,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:30,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:30,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:30,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:30,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:30,702 INFO L87 Difference]: Start difference. First operand 157 states and 398 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2022-02-15 13:06:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:30,849 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2022-02-15 13:06:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:06:30,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 17 [2022-02-15 13:06:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:30,850 INFO L225 Difference]: With dead ends: 220 [2022-02-15 13:06:30,850 INFO L226 Difference]: Without dead ends: 211 [2022-02-15 13:06:30,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:30,850 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:30,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 190 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-15 13:06:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2022-02-15 13:06:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2022-02-15 13:06:30,853 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2022-02-15 13:06:30,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:30,854 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2022-02-15 13:06:30,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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) [2022-02-15 13:06:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2022-02-15 13:06:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:30,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:30,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:30,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-15 13:06:31,059 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,SelfDestructingSolverStorable47 [2022-02-15 13:06:31,059 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2031295783, now seen corresponding path program 35 times [2022-02-15 13:06:31,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:31,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653969475] [2022-02-15 13:06:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:31,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:31,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:31,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653969475] [2022-02-15 13:06:31,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653969475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:31,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336845810] [2022-02-15 13:06:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:31,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:31,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:31,137 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) [2022-02-15 13:06:31,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 13:06:31,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:31,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:31,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:31,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:31,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336845810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:31,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:31,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-02-15 13:06:31,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28398823] [2022-02-15 13:06:31,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:31,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:06:31,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:06:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:31,423 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:31,546 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2022-02-15 13:06:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:06:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:31,547 INFO L225 Difference]: With dead ends: 203 [2022-02-15 13:06:31,547 INFO L226 Difference]: Without dead ends: 196 [2022-02-15 13:06:31,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:06:31,548 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:31,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 171 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-15 13:06:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2022-02-15 13:06:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2022-02-15 13:06:31,550 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2022-02-15 13:06:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:31,551 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2022-02-15 13:06:31,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2022-02-15 13:06:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:31,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:31,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:31,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-15 13:06:31,763 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,SelfDestructingSolverStorable48 [2022-02-15 13:06:31,764 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:31,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1341666965, now seen corresponding path program 36 times [2022-02-15 13:06:31,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:31,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953267513] [2022-02-15 13:06:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:31,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:31,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:31,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953267513] [2022-02-15 13:06:31,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953267513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:31,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471280795] [2022-02-15 13:06:31,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:31,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:31,838 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) [2022-02-15 13:06:31,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 13:06:31,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:31,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:31,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:32,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:32,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471280795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:32,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:32,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:06:32,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874307707] [2022-02-15 13:06:32,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:32,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:32,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:32,186 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:32,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:32,368 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2022-02-15 13:06:32,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:06:32,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:32,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:32,369 INFO L225 Difference]: With dead ends: 276 [2022-02-15 13:06:32,369 INFO L226 Difference]: Without dead ends: 259 [2022-02-15 13:06:32,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:32,370 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:32,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 215 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-15 13:06:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2022-02-15 13:06:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.604651162790698) internal successors, (448), 172 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2022-02-15 13:06:32,373 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2022-02-15 13:06:32,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:32,373 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2022-02-15 13:06:32,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:32,373 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2022-02-15 13:06:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:32,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:32,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:32,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:32,583 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,SelfDestructingSolverStorable49 [2022-02-15 13:06:32,583 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash 273035759, now seen corresponding path program 37 times [2022-02-15 13:06:32,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:32,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808479683] [2022-02-15 13:06:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:32,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:32,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:32,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808479683] [2022-02-15 13:06:32,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808479683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:32,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494410850] [2022-02-15 13:06:32,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:32,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:32,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:32,660 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) [2022-02-15 13:06:32,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 13:06:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:32,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:32,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:32,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494410850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:32,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:32,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:06:32,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873203511] [2022-02-15 13:06:32,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:32,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:32,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:32,978 INFO L87 Difference]: Start difference. First operand 173 states and 448 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 13:06:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:33,187 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2022-02-15 13:06:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:06:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 17 [2022-02-15 13:06:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:33,189 INFO L225 Difference]: With dead ends: 277 [2022-02-15 13:06:33,189 INFO L226 Difference]: Without dead ends: 261 [2022-02-15 13:06:33,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:33,190 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:33,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 294 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-15 13:06:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-02-15 13:06:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.57396449704142) internal successors, (435), 169 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2022-02-15 13:06:33,198 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2022-02-15 13:06:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:33,198 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2022-02-15 13:06:33,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 13:06:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2022-02-15 13:06:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:33,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:33,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:33,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:33,403 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,SelfDestructingSolverStorable50 [2022-02-15 13:06:33,403 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1806258069, now seen corresponding path program 38 times [2022-02-15 13:06:33,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:33,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015570843] [2022-02-15 13:06:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:33,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:33,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015570843] [2022-02-15 13:06:33,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015570843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360122034] [2022-02-15 13:06:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:33,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:33,479 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) [2022-02-15 13:06:33,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 13:06:33,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:33,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:33,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:33,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360122034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:33,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:33,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-15 13:06:33,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573364695] [2022-02-15 13:06:33,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:33,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:06:33,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:06:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:33,767 INFO L87 Difference]: Start difference. First operand 170 states and 435 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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) [2022-02-15 13:06:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:33,955 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2022-02-15 13:06:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:33,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:33,956 INFO L225 Difference]: With dead ends: 262 [2022-02-15 13:06:33,956 INFO L226 Difference]: Without dead ends: 244 [2022-02-15 13:06:33,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:33,956 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:33,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 227 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-15 13:06:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2022-02-15 13:06:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5773809523809526) internal successors, (433), 168 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2022-02-15 13:06:33,959 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2022-02-15 13:06:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:33,960 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2022-02-15 13:06:33,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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) [2022-02-15 13:06:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2022-02-15 13:06:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:33,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:33,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:33,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-15 13:06:34,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:34,165 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1839857297, now seen corresponding path program 39 times [2022-02-15 13:06:34,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:34,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218154277] [2022-02-15 13:06:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:34,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:34,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:34,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218154277] [2022-02-15 13:06:34,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218154277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:34,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682429114] [2022-02-15 13:06:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:34,252 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) [2022-02-15 13:06:34,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 13:06:34,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:06:34,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:34,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:34,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:34,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682429114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:34,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:34,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 13:06:34,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552535119] [2022-02-15 13:06:34,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:34,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:34,588 INFO L87 Difference]: Start difference. First operand 169 states and 433 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:34,765 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2022-02-15 13:06:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:06:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:34,766 INFO L225 Difference]: With dead ends: 233 [2022-02-15 13:06:34,766 INFO L226 Difference]: Without dead ends: 226 [2022-02-15 13:06:34,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:06:34,767 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:34,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 240 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-15 13:06:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2022-02-15 13:06:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5402298850574714) internal successors, (442), 174 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2022-02-15 13:06:34,770 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2022-02-15 13:06:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:34,770 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2022-02-15 13:06:34,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2022-02-15 13:06:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:34,771 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:34,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:34,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-15 13:06:34,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:34,983 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1383679381, now seen corresponding path program 40 times [2022-02-15 13:06:34,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:34,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832750506] [2022-02-15 13:06:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:34,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:35,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:35,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832750506] [2022-02-15 13:06:35,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832750506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:35,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673771190] [2022-02-15 13:06:35,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:35,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:35,056 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) [2022-02-15 13:06:35,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 13:06:35,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:35,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:35,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:35,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673771190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:35,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:35,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-15 13:06:35,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720505127] [2022-02-15 13:06:35,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:35,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:35,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:35,445 INFO L87 Difference]: Start difference. First operand 175 states and 442 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 13:06:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:35,590 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2022-02-15 13:06:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:06:35,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 17 [2022-02-15 13:06:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:35,591 INFO L225 Difference]: With dead ends: 259 [2022-02-15 13:06:35,591 INFO L226 Difference]: Without dead ends: 249 [2022-02-15 13:06:35,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:35,591 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:35,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 191 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-15 13:06:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2022-02-15 13:06:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.569060773480663) internal successors, (465), 181 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2022-02-15 13:06:35,595 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2022-02-15 13:06:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:35,595 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2022-02-15 13:06:35,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2022-02-15 13:06:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2022-02-15 13:06:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:35,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:35,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:35,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:35,812 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,SelfDestructingSolverStorable53 [2022-02-15 13:06:35,812 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 231023343, now seen corresponding path program 41 times [2022-02-15 13:06:35,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:35,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729524810] [2022-02-15 13:06:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:35,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:35,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:35,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729524810] [2022-02-15 13:06:35,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729524810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:35,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159397403] [2022-02-15 13:06:35,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:35,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:35,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:35,903 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) [2022-02-15 13:06:35,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 13:06:35,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:35,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:36,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:36,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159397403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:36,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:36,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-02-15 13:06:36,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718756208] [2022-02-15 13:06:36,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:36,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:06:36,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:06:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:36,258 INFO L87 Difference]: Start difference. First operand 182 states and 465 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2022-02-15 13:06:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:36,370 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2022-02-15 13:06:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:06:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 17 [2022-02-15 13:06:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:36,371 INFO L225 Difference]: With dead ends: 247 [2022-02-15 13:06:36,371 INFO L226 Difference]: Without dead ends: 240 [2022-02-15 13:06:36,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:06:36,372 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:36,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 164 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-15 13:06:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2022-02-15 13:06:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2022-02-15 13:06:36,375 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2022-02-15 13:06:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:36,375 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2022-02-15 13:06:36,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2022-02-15 13:06:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2022-02-15 13:06:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:36,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:36,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:36,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-15 13:06:36,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:36,587 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash -812224575, now seen corresponding path program 42 times [2022-02-15 13:06:36,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:36,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963437637] [2022-02-15 13:06:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:36,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:36,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:36,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963437637] [2022-02-15 13:06:36,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963437637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:36,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848040887] [2022-02-15 13:06:36,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:36,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:36,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:36,670 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) [2022-02-15 13:06:36,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 13:06:36,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:36,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 13:06:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:36,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848040887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:36,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:36,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-02-15 13:06:36,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627417172] [2022-02-15 13:06:36,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:36,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:06:36,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:06:36,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:36,967 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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) [2022-02-15 13:06:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:37,098 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2022-02-15 13:06:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:06:37,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:37,100 INFO L225 Difference]: With dead ends: 231 [2022-02-15 13:06:37,100 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 13:06:37,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:06:37,100 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:37,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 13:06:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2022-02-15 13:06:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2022-02-15 13:06:37,103 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2022-02-15 13:06:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:37,103 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2022-02-15 13:06:37,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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) [2022-02-15 13:06:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2022-02-15 13:06:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:37,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:37,104 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:37,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:37,320 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,SelfDestructingSolverStorable55 [2022-02-15 13:06:37,320 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2062140921, now seen corresponding path program 43 times [2022-02-15 13:06:37,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:37,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481493360] [2022-02-15 13:06:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:37,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:37,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:37,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481493360] [2022-02-15 13:06:37,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481493360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:37,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375485483] [2022-02-15 13:06:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:37,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:37,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:37,364 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) [2022-02-15 13:06:37,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 13:06:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:37,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:37,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375485483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:37,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:37,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-02-15 13:06:37,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590185567] [2022-02-15 13:06:37,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:37,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:37,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:37,459 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:37,557 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2022-02-15 13:06:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:06:37,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 18 [2022-02-15 13:06:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:37,559 INFO L225 Difference]: With dead ends: 295 [2022-02-15 13:06:37,559 INFO L226 Difference]: Without dead ends: 281 [2022-02-15 13:06:37,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:37,559 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:37,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-15 13:06:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2022-02-15 13:06:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2022-02-15 13:06:37,562 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2022-02-15 13:06:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:37,562 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2022-02-15 13:06:37,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2022-02-15 13:06:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:37,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:37,563 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:37,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:37,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:37,775 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1630888425, now seen corresponding path program 44 times [2022-02-15 13:06:37,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:37,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363184321] [2022-02-15 13:06:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:37,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:37,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:37,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363184321] [2022-02-15 13:06:37,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363184321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:37,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345584294] [2022-02-15 13:06:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:37,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:37,807 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) [2022-02-15 13:06:37,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 13:06:37,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:37,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:37,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345584294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:37,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:37,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-02-15 13:06:37,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309300479] [2022-02-15 13:06:37,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:37,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:37,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:37,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:37,903 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:38,003 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2022-02-15 13:06:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:06:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 18 [2022-02-15 13:06:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:38,004 INFO L225 Difference]: With dead ends: 302 [2022-02-15 13:06:38,004 INFO L226 Difference]: Without dead ends: 302 [2022-02-15 13:06:38,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:38,004 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:38,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 105 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-15 13:06:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2022-02-15 13:06:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.576923076923077) internal successors, (469), 182 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2022-02-15 13:06:38,007 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2022-02-15 13:06:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:38,008 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2022-02-15 13:06:38,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2022-02-15 13:06:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:38,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:38,008 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:38,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-15 13:06:38,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:38,224 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash 768473931, now seen corresponding path program 45 times [2022-02-15 13:06:38,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:38,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848371122] [2022-02-15 13:06:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:38,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:38,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848371122] [2022-02-15 13:06:38,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848371122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:38,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222314679] [2022-02-15 13:06:38,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:38,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:38,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:38,269 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) [2022-02-15 13:06:38,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 13:06:38,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:38,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:38,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222314679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:38,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:38,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:38,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900561742] [2022-02-15 13:06:38,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:38,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:38,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:38,370 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:38,539 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2022-02-15 13:06:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:06:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:38,540 INFO L225 Difference]: With dead ends: 476 [2022-02-15 13:06:38,540 INFO L226 Difference]: Without dead ends: 474 [2022-02-15 13:06:38,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:06:38,541 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:38,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 115 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-02-15 13:06:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2022-02-15 13:06:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.746606334841629) internal successors, (607), 221 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2022-02-15 13:06:38,545 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2022-02-15 13:06:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:38,545 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2022-02-15 13:06:38,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2022-02-15 13:06:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:38,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:38,546 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:38,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-15 13:06:38,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-15 13:06:38,762 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1339928737, now seen corresponding path program 46 times [2022-02-15 13:06:38,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:38,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011715281] [2022-02-15 13:06:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:38,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:38,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011715281] [2022-02-15 13:06:38,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011715281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:38,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312367817] [2022-02-15 13:06:38,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:38,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:38,798 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) [2022-02-15 13:06:38,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 13:06:38,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:38,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:38,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312367817] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:38,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:38,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:38,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754506694] [2022-02-15 13:06:38,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:38,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:38,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:38,894 INFO L87 Difference]: Start difference. First operand 222 states and 607 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:39,121 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2022-02-15 13:06:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:06:39,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:39,123 INFO L225 Difference]: With dead ends: 476 [2022-02-15 13:06:39,123 INFO L226 Difference]: Without dead ends: 470 [2022-02-15 13:06:39,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:06:39,123 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:39,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 125 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-02-15 13:06:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2022-02-15 13:06:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.661764705882353) internal successors, (543), 204 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2022-02-15 13:06:39,127 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2022-02-15 13:06:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:39,128 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2022-02-15 13:06:39,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2022-02-15 13:06:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:39,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:39,128 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:39,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-02-15 13:06:39,341 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,SelfDestructingSolverStorable59 [2022-02-15 13:06:39,342 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:39,342 INFO L85 PathProgramCache]: Analyzing trace with hash -591642809, now seen corresponding path program 47 times [2022-02-15 13:06:39,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:39,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999742877] [2022-02-15 13:06:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:39,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:39,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999742877] [2022-02-15 13:06:39,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999742877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:39,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731770144] [2022-02-15 13:06:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:39,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:39,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:39,373 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) [2022-02-15 13:06:39,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 13:06:39,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:06:39,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731770144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:39,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:39,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:39,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831066789] [2022-02-15 13:06:39,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:39,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:39,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:39,488 INFO L87 Difference]: Start difference. First operand 205 states and 543 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:39,685 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2022-02-15 13:06:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:06:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:39,686 INFO L225 Difference]: With dead ends: 423 [2022-02-15 13:06:39,686 INFO L226 Difference]: Without dead ends: 423 [2022-02-15 13:06:39,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:06:39,687 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:39,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 111 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-15 13:06:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2022-02-15 13:06:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6904761904761907) internal successors, (565), 210 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2022-02-15 13:06:39,690 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2022-02-15 13:06:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2022-02-15 13:06:39,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2022-02-15 13:06:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:39,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:39,691 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:39,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:39,907 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,SelfDestructingSolverStorable60 [2022-02-15 13:06:39,907 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1056233913, now seen corresponding path program 48 times [2022-02-15 13:06:39,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:39,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979045366] [2022-02-15 13:06:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:39,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:39,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979045366] [2022-02-15 13:06:39,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979045366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:39,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934416119] [2022-02-15 13:06:39,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:39,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:39,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:39,937 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) [2022-02-15 13:06:39,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 13:06:39,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:06:39,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934416119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:40,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:40,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:40,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706046679] [2022-02-15 13:06:40,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:40,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:40,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:40,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:40,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:40,041 INFO L87 Difference]: Start difference. First operand 211 states and 565 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,235 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2022-02-15 13:06:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:06:40,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,237 INFO L225 Difference]: With dead ends: 326 [2022-02-15 13:06:40,237 INFO L226 Difference]: Without dead ends: 322 [2022-02-15 13:06:40,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:06:40,237 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 82 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-15 13:06:40,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2022-02-15 13:06:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6666666666666665) internal successors, (544), 204 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2022-02-15 13:06:40,241 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2022-02-15 13:06:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,241 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2022-02-15 13:06:40,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2022-02-15 13:06:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:40,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,241 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:40,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:40,453 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1875158539, now seen corresponding path program 49 times [2022-02-15 13:06:40,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914718711] [2022-02-15 13:06:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:40,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914718711] [2022-02-15 13:06:40,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914718711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:40,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041669574] [2022-02-15 13:06:40,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:40,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:40,483 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) [2022-02-15 13:06:40,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 13:06:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041669574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:40,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:40,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:40,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194232520] [2022-02-15 13:06:40,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:40,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:40,580 INFO L87 Difference]: Start difference. First operand 205 states and 544 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,768 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2022-02-15 13:06:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:06:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,769 INFO L225 Difference]: With dead ends: 460 [2022-02-15 13:06:40,769 INFO L226 Difference]: Without dead ends: 451 [2022-02-15 13:06:40,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:06:40,770 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 94 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-15 13:06:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2022-02-15 13:06:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.682242990654206) internal successors, (574), 214 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2022-02-15 13:06:40,774 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2022-02-15 13:06:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,774 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2022-02-15 13:06:40,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2022-02-15 13:06:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:40,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,775 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:40,990 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,SelfDestructingSolverStorable62 [2022-02-15 13:06:40,990 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:40,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1287413217, now seen corresponding path program 50 times [2022-02-15 13:06:40,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336625653] [2022-02-15 13:06:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:41,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336625653] [2022-02-15 13:06:41,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336625653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:41,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198459213] [2022-02-15 13:06:41,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:41,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:41,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:41,020 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) [2022-02-15 13:06:41,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 13:06:41,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:41,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:41,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198459213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:41,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:41,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:41,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15809640] [2022-02-15 13:06:41,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:41,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:41,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:41,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:41,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:41,128 INFO L87 Difference]: Start difference. First operand 215 states and 574 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:41,275 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2022-02-15 13:06:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:06:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:41,276 INFO L225 Difference]: With dead ends: 374 [2022-02-15 13:06:41,276 INFO L226 Difference]: Without dead ends: 365 [2022-02-15 13:06:41,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:06:41,276 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:41,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 111 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-15 13:06:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2022-02-15 13:06:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.6728971962616823) internal successors, (572), 214 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2022-02-15 13:06:41,280 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2022-02-15 13:06:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:41,280 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2022-02-15 13:06:41,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2022-02-15 13:06:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:41,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:41,281 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:41,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:41,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:41,497 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash -134229365, now seen corresponding path program 51 times [2022-02-15 13:06:41,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:41,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600715968] [2022-02-15 13:06:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:41,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:41,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600715968] [2022-02-15 13:06:41,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600715968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:41,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067195526] [2022-02-15 13:06:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:41,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:41,527 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) [2022-02-15 13:06:41,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-15 13:06:41,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:41,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:41,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067195526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:41,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:41,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-02-15 13:06:41,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248845826] [2022-02-15 13:06:41,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:41,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:41,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:41,644 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:41,803 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2022-02-15 13:06:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:06:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:41,805 INFO L225 Difference]: With dead ends: 439 [2022-02-15 13:06:41,805 INFO L226 Difference]: Without dead ends: 436 [2022-02-15 13:06:41,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:06:41,805 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 112 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:41,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 93 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-15 13:06:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2022-02-15 13:06:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2022-02-15 13:06:41,822 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2022-02-15 13:06:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:41,822 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2022-02-15 13:06:41,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2022-02-15 13:06:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:41,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:41,823 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:41,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-15 13:06:42,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:42,027 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash -598820469, now seen corresponding path program 52 times [2022-02-15 13:06:42,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:42,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907445917] [2022-02-15 13:06:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:42,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:42,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:42,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907445917] [2022-02-15 13:06:42,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907445917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:42,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745915493] [2022-02-15 13:06:42,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:42,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:42,055 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) [2022-02-15 13:06:42,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-15 13:06:42,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:42,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:42,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:42,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745915493] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:42,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:42,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-02-15 13:06:42,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866660709] [2022-02-15 13:06:42,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:42,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:42,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:42,155 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:42,368 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2022-02-15 13:06:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:06:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:42,370 INFO L225 Difference]: With dead ends: 389 [2022-02-15 13:06:42,370 INFO L226 Difference]: Without dead ends: 383 [2022-02-15 13:06:42,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:06:42,370 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:42,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 110 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-15 13:06:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2022-02-15 13:06:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6511627906976742) internal successors, (570), 215 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2022-02-15 13:06:42,374 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2022-02-15 13:06:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:42,374 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2022-02-15 13:06:42,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2022-02-15 13:06:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:42,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:42,375 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:42,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:42,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:42,588 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -632419697, now seen corresponding path program 53 times [2022-02-15 13:06:42,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:42,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799193721] [2022-02-15 13:06:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:42,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:42,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799193721] [2022-02-15 13:06:42,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799193721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:42,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983539209] [2022-02-15 13:06:42,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:42,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:42,636 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) [2022-02-15 13:06:42,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-15 13:06:42,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:42,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983539209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:42,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:42,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-15 13:06:42,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090503511] [2022-02-15 13:06:42,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:42,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:42,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:42,755 INFO L87 Difference]: Start difference. First operand 216 states and 570 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:42,983 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2022-02-15 13:06:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:06:42,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:42,985 INFO L225 Difference]: With dead ends: 347 [2022-02-15 13:06:42,985 INFO L226 Difference]: Without dead ends: 339 [2022-02-15 13:06:42,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:06:42,986 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:42,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 105 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:42,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-15 13:06:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2022-02-15 13:06:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.65929203539823) internal successors, (601), 226 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2022-02-15 13:06:42,989 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2022-02-15 13:06:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:42,989 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2022-02-15 13:06:42,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2022-02-15 13:06:42,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:42,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:42,990 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:43,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-15 13:06:43,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:43,195 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:43,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1160685511, now seen corresponding path program 54 times [2022-02-15 13:06:43,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:43,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291792046] [2022-02-15 13:06:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:43,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:43,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291792046] [2022-02-15 13:06:43,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291792046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:43,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297632236] [2022-02-15 13:06:43,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:43,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:43,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:43,223 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) [2022-02-15 13:06:43,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-15 13:06:43,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:06:43,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297632236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:43,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:43,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-02-15 13:06:43,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492343426] [2022-02-15 13:06:43,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:43,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:43,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:43,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:43,344 INFO L87 Difference]: Start difference. First operand 227 states and 601 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:43,526 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2022-02-15 13:06:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:06:43,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:43,528 INFO L225 Difference]: With dead ends: 526 [2022-02-15 13:06:43,528 INFO L226 Difference]: Without dead ends: 523 [2022-02-15 13:06:43,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:06:43,529 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:43,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 155 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-15 13:06:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2022-02-15 13:06:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7472527472527473) internal successors, (750), 273 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2022-02-15 13:06:43,534 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2022-02-15 13:06:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:43,534 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2022-02-15 13:06:43,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2022-02-15 13:06:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:43,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:43,535 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:43,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-15 13:06:43,747 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,SelfDestructingSolverStorable67 [2022-02-15 13:06:43,748 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash 696094407, now seen corresponding path program 55 times [2022-02-15 13:06:43,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:43,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182776908] [2022-02-15 13:06:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:43,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:43,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:43,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182776908] [2022-02-15 13:06:43,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182776908] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:43,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870558258] [2022-02-15 13:06:43,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:43,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:43,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:43,775 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) [2022-02-15 13:06:43,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-15 13:06:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:43,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:43,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870558258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:43,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:43,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-02-15 13:06:43,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424405463] [2022-02-15 13:06:43,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:43,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:43,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:43,894 INFO L87 Difference]: Start difference. First operand 274 states and 750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:44,136 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2022-02-15 13:06:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 13:06:44,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:44,137 INFO L225 Difference]: With dead ends: 468 [2022-02-15 13:06:44,138 INFO L226 Difference]: Without dead ends: 464 [2022-02-15 13:06:44,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:06:44,138 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:44,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 87 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-15 13:06:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2022-02-15 13:06:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.734317343173432) internal successors, (741), 271 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2022-02-15 13:06:44,151 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2022-02-15 13:06:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:44,151 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2022-02-15 13:06:44,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2022-02-15 13:06:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:44,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:44,152 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:44,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:44,367 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,SelfDestructingSolverStorable68 [2022-02-15 13:06:44,367 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:44,367 INFO L85 PathProgramCache]: Analyzing trace with hash 662495179, now seen corresponding path program 56 times [2022-02-15 13:06:44,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:44,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705821807] [2022-02-15 13:06:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:44,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:44,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:44,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705821807] [2022-02-15 13:06:44,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705821807] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:44,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660112094] [2022-02-15 13:06:44,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:44,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:44,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:44,410 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) [2022-02-15 13:06:44,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-15 13:06:44,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:44,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:44,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:44,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:44,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660112094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:44,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:44,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-02-15 13:06:44,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349393116] [2022-02-15 13:06:44,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:44,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:44,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:44,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:44,519 INFO L87 Difference]: Start difference. First operand 272 states and 741 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:44,744 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2022-02-15 13:06:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:06:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:44,746 INFO L225 Difference]: With dead ends: 487 [2022-02-15 13:06:44,746 INFO L226 Difference]: Without dead ends: 479 [2022-02-15 13:06:44,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:06:44,747 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:44,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 97 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-15 13:06:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2022-02-15 13:06:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2022-02-15 13:06:44,751 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2022-02-15 13:06:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:44,751 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2022-02-15 13:06:44,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2022-02-15 13:06:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:44,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:44,752 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:44,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-15 13:06:44,952 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,SelfDestructingSolverStorable69 [2022-02-15 13:06:44,952 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:44,953 INFO L85 PathProgramCache]: Analyzing trace with hash -379080889, now seen corresponding path program 57 times [2022-02-15 13:06:44,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:44,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558019196] [2022-02-15 13:06:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:44,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:44,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:44,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558019196] [2022-02-15 13:06:44,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558019196] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:44,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045440432] [2022-02-15 13:06:44,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:44,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:44,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:44,992 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) [2022-02-15 13:06:44,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-15 13:06:45,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:45,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:45,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045440432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:45,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:45,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-15 13:06:45,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639466192] [2022-02-15 13:06:45,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:06:45,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:06:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:45,117 INFO L87 Difference]: Start difference. First operand 293 states and 815 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:45,334 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2022-02-15 13:06:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:06:45,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:45,336 INFO L225 Difference]: With dead ends: 466 [2022-02-15 13:06:45,336 INFO L226 Difference]: Without dead ends: 454 [2022-02-15 13:06:45,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:06:45,336 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:45,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 103 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-15 13:06:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2022-02-15 13:06:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.8006430868167205) internal successors, (871), 311 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2022-02-15 13:06:45,341 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2022-02-15 13:06:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:45,342 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2022-02-15 13:06:45,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2022-02-15 13:06:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:45,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:45,342 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:45,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-15 13:06:45,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:45,549 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1183743623, now seen corresponding path program 58 times [2022-02-15 13:06:45,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:45,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538543181] [2022-02-15 13:06:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:45,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:45,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538543181] [2022-02-15 13:06:45,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538543181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:45,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123511623] [2022-02-15 13:06:45,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:45,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:45,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:45,595 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) [2022-02-15 13:06:45,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-15 13:06:45,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:45,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123511623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:45,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:45,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-02-15 13:06:45,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933947868] [2022-02-15 13:06:45,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:45,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:45,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:45,680 INFO L87 Difference]: Start difference. First operand 312 states and 871 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:45,746 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2022-02-15 13:06:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:06:45,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 18 [2022-02-15 13:06:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:45,748 INFO L225 Difference]: With dead ends: 436 [2022-02-15 13:06:45,748 INFO L226 Difference]: Without dead ends: 436 [2022-02-15 13:06:45,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:45,748 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:45,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 70 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-15 13:06:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2022-02-15 13:06:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.812698412698413) internal successors, (886), 315 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2022-02-15 13:06:45,753 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2022-02-15 13:06:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:45,753 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2022-02-15 13:06:45,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2022-02-15 13:06:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:45,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:45,753 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:45,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-15 13:06:45,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:45,959 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:45,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1782526253, now seen corresponding path program 59 times [2022-02-15 13:06:45,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:45,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685109156] [2022-02-15 13:06:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:45,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:45,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685109156] [2022-02-15 13:06:45,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685109156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:45,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254586901] [2022-02-15 13:06:45,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:45,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:45,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:45,996 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) [2022-02-15 13:06:45,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-15 13:06:46,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:46,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:46,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:46,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254586901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:46,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:46,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:46,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070516621] [2022-02-15 13:06:46,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:46,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:46,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:46,100 INFO L87 Difference]: Start difference. First operand 316 states and 886 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:46,201 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2022-02-15 13:06:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:06:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:46,203 INFO L225 Difference]: With dead ends: 389 [2022-02-15 13:06:46,203 INFO L226 Difference]: Without dead ends: 389 [2022-02-15 13:06:46,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:46,203 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:46,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 60 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-15 13:06:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2022-02-15 13:06:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8144654088050314) internal successors, (895), 318 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2022-02-15 13:06:46,207 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2022-02-15 13:06:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:46,207 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2022-02-15 13:06:46,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2022-02-15 13:06:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:46,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:46,208 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:46,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-15 13:06:46,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:46,409 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:46,409 INFO L85 PathProgramCache]: Analyzing trace with hash 324257867, now seen corresponding path program 60 times [2022-02-15 13:06:46,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:46,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339846273] [2022-02-15 13:06:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:46,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:46,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339846273] [2022-02-15 13:06:46,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339846273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:46,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160432170] [2022-02-15 13:06:46,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:46,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:46,449 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) [2022-02-15 13:06:46,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-15 13:06:46,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:46,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:46,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160432170] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:46,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:46,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:46,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800788636] [2022-02-15 13:06:46,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:46,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:46,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:46,543 INFO L87 Difference]: Start difference. First operand 319 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:46,674 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2022-02-15 13:06:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:06:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:46,675 INFO L225 Difference]: With dead ends: 399 [2022-02-15 13:06:46,675 INFO L226 Difference]: Without dead ends: 399 [2022-02-15 13:06:46,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:06:46,676 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:46,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 80 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-15 13:06:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2022-02-15 13:06:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8161993769470404) internal successors, (904), 321 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2022-02-15 13:06:46,680 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2022-02-15 13:06:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:46,680 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2022-02-15 13:06:46,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2022-02-15 13:06:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:46,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:46,681 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:46,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-15 13:06:46,891 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,SelfDestructingSolverStorable73 [2022-02-15 13:06:46,891 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:46,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1824538669, now seen corresponding path program 61 times [2022-02-15 13:06:46,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:46,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380438473] [2022-02-15 13:06:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:46,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:46,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380438473] [2022-02-15 13:06:46,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380438473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:46,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268929418] [2022-02-15 13:06:46,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:46,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:46,928 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) [2022-02-15 13:06:46,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-15 13:06:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268929418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:47,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:47,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:47,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230223525] [2022-02-15 13:06:47,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:47,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:47,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:47,025 INFO L87 Difference]: Start difference. First operand 322 states and 904 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:47,212 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2022-02-15 13:06:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:06:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:47,214 INFO L225 Difference]: With dead ends: 497 [2022-02-15 13:06:47,214 INFO L226 Difference]: Without dead ends: 497 [2022-02-15 13:06:47,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:06:47,214 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:47,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 108 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-02-15 13:06:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2022-02-15 13:06:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8207547169811322) internal successors, (897), 318 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2022-02-15 13:06:47,219 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2022-02-15 13:06:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:47,219 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2022-02-15 13:06:47,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2022-02-15 13:06:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:47,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:47,220 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:47,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:47,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:47,423 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1253083863, now seen corresponding path program 62 times [2022-02-15 13:06:47,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:47,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017556448] [2022-02-15 13:06:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:47,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:47,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017556448] [2022-02-15 13:06:47,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017556448] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:47,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761896607] [2022-02-15 13:06:47,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:47,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:47,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:47,474 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) [2022-02-15 13:06:47,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-15 13:06:47,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761896607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:47,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:47,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:47,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650816462] [2022-02-15 13:06:47,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:47,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:47,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:47,587 INFO L87 Difference]: Start difference. First operand 319 states and 897 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:47,786 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2022-02-15 13:06:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:06:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:47,788 INFO L225 Difference]: With dead ends: 422 [2022-02-15 13:06:47,788 INFO L226 Difference]: Without dead ends: 416 [2022-02-15 13:06:47,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:06:47,788 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:47,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 92 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-15 13:06:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2022-02-15 13:06:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.8108974358974357) internal successors, (877), 312 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2022-02-15 13:06:47,792 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2022-02-15 13:06:47,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:47,793 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2022-02-15 13:06:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2022-02-15 13:06:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:47,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:47,793 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:47,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:47,995 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,SelfDestructingSolverStorable75 [2022-02-15 13:06:47,995 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1110311887, now seen corresponding path program 63 times [2022-02-15 13:06:47,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:47,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763525224] [2022-02-15 13:06:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:47,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:48,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:48,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763525224] [2022-02-15 13:06:48,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763525224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:48,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484274492] [2022-02-15 13:06:48,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:48,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:48,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:48,027 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) [2022-02-15 13:06:48,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-15 13:06:48,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:06:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:48,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:48,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484274492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:48,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:48,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:48,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022303644] [2022-02-15 13:06:48,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:48,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:48,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:48,129 INFO L87 Difference]: Start difference. First operand 313 states and 877 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:48,294 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2022-02-15 13:06:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:06:48,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:48,296 INFO L225 Difference]: With dead ends: 573 [2022-02-15 13:06:48,296 INFO L226 Difference]: Without dead ends: 570 [2022-02-15 13:06:48,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:06:48,297 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:48,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 123 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-15 13:06:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2022-02-15 13:06:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.875) internal successors, (1012), 352 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2022-02-15 13:06:48,302 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2022-02-15 13:06:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2022-02-15 13:06:48,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2022-02-15 13:06:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:48,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:48,303 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:48,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-15 13:06:48,511 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,SelfDestructingSolverStorable76 [2022-02-15 13:06:48,511 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash 645720783, now seen corresponding path program 64 times [2022-02-15 13:06:48,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:48,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748956495] [2022-02-15 13:06:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:48,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:48,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:48,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748956495] [2022-02-15 13:06:48,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748956495] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:48,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557656477] [2022-02-15 13:06:48,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:48,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:48,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:48,545 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) [2022-02-15 13:06:48,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-15 13:06:48,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:48,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:48,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:48,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:48,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557656477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:48,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:48,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:48,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718570525] [2022-02-15 13:06:48,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:48,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:48,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:48,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:48,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:48,644 INFO L87 Difference]: Start difference. First operand 353 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:48,848 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2022-02-15 13:06:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:06:48,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:48,850 INFO L225 Difference]: With dead ends: 554 [2022-02-15 13:06:48,850 INFO L226 Difference]: Without dead ends: 550 [2022-02-15 13:06:48,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:06:48,850 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:48,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 110 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-02-15 13:06:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2022-02-15 13:06:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.8228228228228227) internal successors, (940), 333 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2022-02-15 13:06:48,855 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2022-02-15 13:06:48,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:48,855 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2022-02-15 13:06:48,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2022-02-15 13:06:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:48,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:48,856 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:48,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-15 13:06:49,056 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,SelfDestructingSolverStorable77 [2022-02-15 13:06:49,057 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:49,057 INFO L85 PathProgramCache]: Analyzing trace with hash 612121555, now seen corresponding path program 65 times [2022-02-15 13:06:49,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:49,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886942957] [2022-02-15 13:06:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:49,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:49,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886942957] [2022-02-15 13:06:49,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886942957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:49,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946107156] [2022-02-15 13:06:49,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:49,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:49,087 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) [2022-02-15 13:06:49,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-15 13:06:49,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:49,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946107156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:49,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:49,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:49,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829535589] [2022-02-15 13:06:49,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:49,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:49,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:49,191 INFO L87 Difference]: Start difference. First operand 334 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:49,370 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2022-02-15 13:06:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:06:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:49,373 INFO L225 Difference]: With dead ends: 542 [2022-02-15 13:06:49,373 INFO L226 Difference]: Without dead ends: 534 [2022-02-15 13:06:49,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:06:49,373 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:49,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 86 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-02-15 13:06:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2022-02-15 13:06:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.829971181556196) internal successors, (982), 347 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2022-02-15 13:06:49,378 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2022-02-15 13:06:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2022-02-15 13:06:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2022-02-15 13:06:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:49,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:49,379 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:49,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-15 13:06:49,587 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,SelfDestructingSolverStorable78 [2022-02-15 13:06:49,587 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash -429454513, now seen corresponding path program 66 times [2022-02-15 13:06:49,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:49,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029388653] [2022-02-15 13:06:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:49,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:49,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029388653] [2022-02-15 13:06:49,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029388653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:49,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582301994] [2022-02-15 13:06:49,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:49,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:49,618 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) [2022-02-15 13:06:49,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-15 13:06:49,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:49,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:49,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582301994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:49,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:49,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-02-15 13:06:49,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062114513] [2022-02-15 13:06:49,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:49,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:49,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:49,715 INFO L87 Difference]: Start difference. First operand 348 states and 982 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:49,859 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2022-02-15 13:06:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:06:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:49,861 INFO L225 Difference]: With dead ends: 473 [2022-02-15 13:06:49,861 INFO L226 Difference]: Without dead ends: 467 [2022-02-15 13:06:49,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:06:49,862 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:49,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 94 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-02-15 13:06:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2022-02-15 13:06:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.82183908045977) internal successors, (982), 348 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2022-02-15 13:06:49,866 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2022-02-15 13:06:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:49,867 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2022-02-15 13:06:49,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2022-02-15 13:06:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:49,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:49,867 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:49,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:50,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:50,083 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:50,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2002349101, now seen corresponding path program 67 times [2022-02-15 13:06:50,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:50,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643853401] [2022-02-15 13:06:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:50,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:50,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643853401] [2022-02-15 13:06:50,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643853401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:50,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955201779] [2022-02-15 13:06:50,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:50,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:50,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:50,112 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) [2022-02-15 13:06:50,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-15 13:06:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:50,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:50,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955201779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:50,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:50,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-02-15 13:06:50,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605456332] [2022-02-15 13:06:50,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:50,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:50,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:50,206 INFO L87 Difference]: Start difference. First operand 349 states and 982 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:50,277 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2022-02-15 13:06:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:06:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 18 [2022-02-15 13:06:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:50,281 INFO L225 Difference]: With dead ends: 405 [2022-02-15 13:06:50,282 INFO L226 Difference]: Without dead ends: 397 [2022-02-15 13:06:50,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:06:50,282 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:50,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 56 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-15 13:06:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2022-02-15 13:06:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8189655172413794) internal successors, (981), 348 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2022-02-15 13:06:50,287 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2022-02-15 13:06:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:50,287 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2022-02-15 13:06:50,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2022-02-15 13:06:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2022-02-15 13:06:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:50,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:50,290 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:50,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:50,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:50,491 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:50,492 INFO L85 PathProgramCache]: Analyzing trace with hash 752388103, now seen corresponding path program 68 times [2022-02-15 13:06:50,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:50,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846155943] [2022-02-15 13:06:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:50,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:50,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846155943] [2022-02-15 13:06:50,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846155943] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:50,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118619293] [2022-02-15 13:06:50,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:50,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:50,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:50,523 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) [2022-02-15 13:06:50,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-15 13:06:50,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:50,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:50,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118619293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:50,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:50,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-15 13:06:50,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065703391] [2022-02-15 13:06:50,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:50,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:50,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:50,627 INFO L87 Difference]: Start difference. First operand 349 states and 981 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:50,795 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2022-02-15 13:06:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:06:50,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:50,796 INFO L225 Difference]: With dead ends: 447 [2022-02-15 13:06:50,796 INFO L226 Difference]: Without dead ends: 447 [2022-02-15 13:06:50,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:06:50,797 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:50,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-15 13:06:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2022-02-15 13:06:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.818696883852691) internal successors, (995), 353 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2022-02-15 13:06:50,805 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2022-02-15 13:06:50,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:50,805 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2022-02-15 13:06:50,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2022-02-15 13:06:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:50,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:50,806 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:50,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:51,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:51,007 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash -549996793, now seen corresponding path program 69 times [2022-02-15 13:06:51,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:51,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189172022] [2022-02-15 13:06:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:51,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:51,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189172022] [2022-02-15 13:06:51,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189172022] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:51,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595663211] [2022-02-15 13:06:51,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:51,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:51,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:51,034 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) [2022-02-15 13:06:51,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-15 13:06:51,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:06:51,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:51,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595663211] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:51,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:51,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-02-15 13:06:51,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936525051] [2022-02-15 13:06:51,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:51,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:51,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:51,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:51,133 INFO L87 Difference]: Start difference. First operand 354 states and 995 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:51,290 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2022-02-15 13:06:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:06:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:51,292 INFO L225 Difference]: With dead ends: 485 [2022-02-15 13:06:51,292 INFO L226 Difference]: Without dead ends: 483 [2022-02-15 13:06:51,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:06:51,292 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:51,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 98 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-02-15 13:06:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2022-02-15 13:06:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8290598290598292) internal successors, (993), 351 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2022-02-15 13:06:51,297 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2022-02-15 13:06:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:51,297 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2022-02-15 13:06:51,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2022-02-15 13:06:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:51,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:51,298 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:51,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-15 13:06:51,498 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,SelfDestructingSolverStorable82 [2022-02-15 13:06:51,499 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:51,499 INFO L85 PathProgramCache]: Analyzing trace with hash -592009209, now seen corresponding path program 70 times [2022-02-15 13:06:51,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:51,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452457885] [2022-02-15 13:06:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:51,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:51,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452457885] [2022-02-15 13:06:51,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452457885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:51,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908232800] [2022-02-15 13:06:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:51,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:51,531 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) [2022-02-15 13:06:51,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-15 13:06:51,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:51,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908232800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:51,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:51,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-02-15 13:06:51,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184543485] [2022-02-15 13:06:51,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:51,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:51,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:51,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:51,635 INFO L87 Difference]: Start difference. First operand 352 states and 993 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:51,811 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2022-02-15 13:06:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:06:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:51,812 INFO L225 Difference]: With dead ends: 553 [2022-02-15 13:06:51,812 INFO L226 Difference]: Without dead ends: 553 [2022-02-15 13:06:51,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:06:51,813 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:51,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 97 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-15 13:06:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2022-02-15 13:06:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.824858757062147) internal successors, (1000), 354 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2022-02-15 13:06:51,818 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2022-02-15 13:06:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:51,818 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2022-02-15 13:06:51,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2022-02-15 13:06:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:51,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:51,819 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:51,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-15 13:06:52,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:52,019 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash -20554403, now seen corresponding path program 71 times [2022-02-15 13:06:52,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:52,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420650054] [2022-02-15 13:06:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:52,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:52,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:52,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420650054] [2022-02-15 13:06:52,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420650054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:52,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762890073] [2022-02-15 13:06:52,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:52,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:52,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:52,048 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) [2022-02-15 13:06:52,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-15 13:06:52,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:52,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:52,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:52,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:52,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:52,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762890073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:52,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:52,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-02-15 13:06:52,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686399877] [2022-02-15 13:06:52,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:52,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:52,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:52,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:52,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:52,148 INFO L87 Difference]: Start difference. First operand 355 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:52,366 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2022-02-15 13:06:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:06:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:52,367 INFO L225 Difference]: With dead ends: 530 [2022-02-15 13:06:52,367 INFO L226 Difference]: Without dead ends: 521 [2022-02-15 13:06:52,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:06:52,368 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:52,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 100 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-15 13:06:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2022-02-15 13:06:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.8) internal successors, (952), 340 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2022-02-15 13:06:52,373 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2022-02-15 13:06:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:52,373 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2022-02-15 13:06:52,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2022-02-15 13:06:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:52,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:52,373 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:52,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-15 13:06:52,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:52,574 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:52,574 INFO L85 PathProgramCache]: Analyzing trace with hash 514675399, now seen corresponding path program 72 times [2022-02-15 13:06:52,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:52,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375073374] [2022-02-15 13:06:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:52,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:52,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:52,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375073374] [2022-02-15 13:06:52,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375073374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:52,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671834657] [2022-02-15 13:06:52,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:52,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:52,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:52,605 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) [2022-02-15 13:06:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-15 13:06:52,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:52,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:52,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:52,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671834657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:52,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:52,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-15 13:06:52,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195373287] [2022-02-15 13:06:52,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:52,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:52,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:52,735 INFO L87 Difference]: Start difference. First operand 341 states and 952 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:52,940 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2022-02-15 13:06:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:06:52,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:52,941 INFO L225 Difference]: With dead ends: 483 [2022-02-15 13:06:52,941 INFO L226 Difference]: Without dead ends: 471 [2022-02-15 13:06:52,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:06:52,941 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 98 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:52,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 95 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-02-15 13:06:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2022-02-15 13:06:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.809798270893372) internal successors, (975), 347 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2022-02-15 13:06:52,946 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2022-02-15 13:06:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:52,947 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2022-02-15 13:06:52,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2022-02-15 13:06:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:52,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:52,947 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:52,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-15 13:06:53,148 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,SelfDestructingSolverStorable85 [2022-02-15 13:06:53,148 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2025321811, now seen corresponding path program 73 times [2022-02-15 13:06:53,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:53,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892947340] [2022-02-15 13:06:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:53,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:53,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892947340] [2022-02-15 13:06:53,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892947340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:53,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212230002] [2022-02-15 13:06:53,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:53,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:53,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:53,180 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) [2022-02-15 13:06:53,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-15 13:06:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212230002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:53,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:53,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-15 13:06:53,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098483865] [2022-02-15 13:06:53,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:53,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:06:53,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:06:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:53,288 INFO L87 Difference]: Start difference. First operand 348 states and 975 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:53,490 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2022-02-15 13:06:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:06:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:53,491 INFO L225 Difference]: With dead ends: 521 [2022-02-15 13:06:53,491 INFO L226 Difference]: Without dead ends: 521 [2022-02-15 13:06:53,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:06:53,492 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:53,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 105 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-15 13:06:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2022-02-15 13:06:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.8147138964577656) internal successors, (1033), 367 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2022-02-15 13:06:53,497 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2022-02-15 13:06:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:53,497 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2022-02-15 13:06:53,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2022-02-15 13:06:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:53,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:53,498 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:53,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:53,698 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,SelfDestructingSolverStorable86 [2022-02-15 13:06:53,699 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:53,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1882087477, now seen corresponding path program 74 times [2022-02-15 13:06:53,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:53,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188802135] [2022-02-15 13:06:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:53,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:53,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188802135] [2022-02-15 13:06:53,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188802135] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:53,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906666243] [2022-02-15 13:06:53,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:53,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:53,727 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) [2022-02-15 13:06:53,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-15 13:06:53,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:53,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:53,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:53,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906666243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:53,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:53,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-02-15 13:06:53,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712529806] [2022-02-15 13:06:53,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:53,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:53,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:53,833 INFO L87 Difference]: Start difference. First operand 368 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:54,014 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2022-02-15 13:06:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:06:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:54,015 INFO L225 Difference]: With dead ends: 613 [2022-02-15 13:06:54,015 INFO L226 Difference]: Without dead ends: 613 [2022-02-15 13:06:54,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:06:54,016 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:54,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 164 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-15 13:06:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2022-02-15 13:06:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.8567961165048543) internal successors, (1177), 412 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2022-02-15 13:06:54,022 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2022-02-15 13:06:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:54,022 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2022-02-15 13:06:54,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2022-02-15 13:06:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:54,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:54,023 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:54,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:54,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:54,236 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1038301613, now seen corresponding path program 75 times [2022-02-15 13:06:54,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:54,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855616296] [2022-02-15 13:06:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:54,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:54,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:54,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855616296] [2022-02-15 13:06:54,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855616296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:54,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083797058] [2022-02-15 13:06:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:54,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:54,261 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) [2022-02-15 13:06:54,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-15 13:06:54,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:54,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:54,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083797058] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:54,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:54,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-02-15 13:06:54,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655185278] [2022-02-15 13:06:54,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:54,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:54,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:54,440 INFO L87 Difference]: Start difference. First operand 413 states and 1177 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:54,617 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2022-02-15 13:06:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:06:54,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:54,618 INFO L225 Difference]: With dead ends: 723 [2022-02-15 13:06:54,618 INFO L226 Difference]: Without dead ends: 723 [2022-02-15 13:06:54,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:06:54,619 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:54,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 107 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-02-15 13:06:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2022-02-15 13:06:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9110169491525424) internal successors, (1374), 472 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2022-02-15 13:06:54,626 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2022-02-15 13:06:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:54,626 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2022-02-15 13:06:54,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2022-02-15 13:06:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:54,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:54,627 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:54,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:54,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:54,828 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash -466846807, now seen corresponding path program 76 times [2022-02-15 13:06:54,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:54,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408297236] [2022-02-15 13:06:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:54,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:54,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:54,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408297236] [2022-02-15 13:06:54,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408297236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:54,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432100676] [2022-02-15 13:06:54,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:54,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:54,853 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) [2022-02-15 13:06:54,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-15 13:06:54,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:54,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:54,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:54,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432100676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:54,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:54,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-02-15 13:06:54,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366231323] [2022-02-15 13:06:54,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:54,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:54,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:54,955 INFO L87 Difference]: Start difference. First operand 473 states and 1374 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:55,215 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2022-02-15 13:06:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 13:06:55,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:55,216 INFO L225 Difference]: With dead ends: 693 [2022-02-15 13:06:55,216 INFO L226 Difference]: Without dead ends: 687 [2022-02-15 13:06:55,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:06:55,217 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:55,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 103 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-02-15 13:06:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2022-02-15 13:06:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.8896103896103895) internal successors, (1335), 462 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2022-02-15 13:06:55,224 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2022-02-15 13:06:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:55,224 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2022-02-15 13:06:55,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2022-02-15 13:06:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:55,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:55,225 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:55,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:55,425 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,SelfDestructingSolverStorable89 [2022-02-15 13:06:55,425 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:55,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash 68382995, now seen corresponding path program 77 times [2022-02-15 13:06:55,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:55,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042577054] [2022-02-15 13:06:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:55,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:55,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:55,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042577054] [2022-02-15 13:06:55,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042577054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:55,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306252101] [2022-02-15 13:06:55,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:55,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:55,454 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) [2022-02-15 13:06:55,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-15 13:06:55,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:55,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:55,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:55,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306252101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:55,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:55,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-02-15 13:06:55,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373625199] [2022-02-15 13:06:55,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:55,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:06:55,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:06:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:55,558 INFO L87 Difference]: Start difference. First operand 463 states and 1335 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:55,790 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2022-02-15 13:06:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:06:55,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:55,791 INFO L225 Difference]: With dead ends: 706 [2022-02-15 13:06:55,791 INFO L226 Difference]: Without dead ends: 694 [2022-02-15 13:06:55,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:06:55,792 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:55,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 113 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-15 13:06:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2022-02-15 13:06:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.903157894736842) internal successors, (1379), 475 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2022-02-15 13:06:55,799 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2022-02-15 13:06:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:55,799 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2022-02-15 13:06:55,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2022-02-15 13:06:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:06:55,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:55,800 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:55,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-15 13:06:56,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:56,007 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash -519362327, now seen corresponding path program 78 times [2022-02-15 13:06:56,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:56,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108118612] [2022-02-15 13:06:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:56,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:56,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108118612] [2022-02-15 13:06:56,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108118612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:56,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866185204] [2022-02-15 13:06:56,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:56,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:56,048 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) [2022-02-15 13:06:56,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-15 13:06:56,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866185204] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:56,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:56,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-15 13:06:56,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259747669] [2022-02-15 13:06:56,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:56,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:06:56,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:56,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:06:56,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:56,156 INFO L87 Difference]: Start difference. First operand 476 states and 1379 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:56,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:56,354 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2022-02-15 13:06:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:06:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 13:06:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:56,356 INFO L225 Difference]: With dead ends: 674 [2022-02-15 13:06:56,356 INFO L226 Difference]: Without dead ends: 656 [2022-02-15 13:06:56,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:06:56,356 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:56,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 68 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-02-15 13:06:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2022-02-15 13:06:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.9014084507042255) internal successors, (1442), 497 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2022-02-15 13:06:56,363 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2022-02-15 13:06:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:56,363 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2022-02-15 13:06:56,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2022-02-15 13:06:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:06:56,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:56,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:56,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:56,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:56,565 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:56,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1008686311, now seen corresponding path program 79 times [2022-02-15 13:06:56,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:56,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543609435] [2022-02-15 13:06:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:56,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:56,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543609435] [2022-02-15 13:06:56,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543609435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:56,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977489432] [2022-02-15 13:06:56,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:56,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:56,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:56,693 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) [2022-02-15 13:06:56,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-15 13:06:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:06:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:57,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977489432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:57,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:57,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 13:06:57,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126099568] [2022-02-15 13:06:57,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:57,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:06:57,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:57,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:06:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:06:57,033 INFO L87 Difference]: Start difference. First operand 498 states and 1442 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:57,314 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2022-02-15 13:06:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:06:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:06:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:57,315 INFO L225 Difference]: With dead ends: 678 [2022-02-15 13:06:57,316 INFO L226 Difference]: Without dead ends: 655 [2022-02-15 13:06:57,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:06:57,316 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 103 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:57,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 343 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-15 13:06:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2022-02-15 13:06:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.8679245283018866) internal successors, (1520), 530 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2022-02-15 13:06:57,323 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2022-02-15 13:06:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:57,323 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2022-02-15 13:06:57,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2022-02-15 13:06:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:06:57,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:57,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:57,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:57,535 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,SelfDestructingSolverStorable92 [2022-02-15 13:06:57,536 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash -455666133, now seen corresponding path program 80 times [2022-02-15 13:06:57,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:57,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628272117] [2022-02-15 13:06:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:57,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:57,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:57,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628272117] [2022-02-15 13:06:57,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628272117] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:57,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645869239] [2022-02-15 13:06:57,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:57,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:57,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:57,639 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) [2022-02-15 13:06:57,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-15 13:06:57,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:57,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:06:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:57,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:58,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645869239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:58,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:58,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-15 13:06:58,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637607292] [2022-02-15 13:06:58,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:58,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:06:58,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:58,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:06:58,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:58,021 INFO L87 Difference]: Start difference. First operand 531 states and 1520 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2022-02-15 13:06:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:58,260 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2022-02-15 13:06:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 19 [2022-02-15 13:06:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:58,266 INFO L225 Difference]: With dead ends: 714 [2022-02-15 13:06:58,267 INFO L226 Difference]: Without dead ends: 707 [2022-02-15 13:06:58,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:06:58,267 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 138 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:58,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 386 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-02-15 13:06:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2022-02-15 13:06:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.895306859205776) internal successors, (1604), 554 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2022-02-15 13:06:58,275 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2022-02-15 13:06:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:58,275 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2022-02-15 13:06:58,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2022-02-15 13:06:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2022-02-15 13:06:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:06:58,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:58,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:58,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-15 13:06:58,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:58,477 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1159036591, now seen corresponding path program 81 times [2022-02-15 13:06:58,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:58,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799866784] [2022-02-15 13:06:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:58,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:58,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:58,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799866784] [2022-02-15 13:06:58,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799866784] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:58,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185738674] [2022-02-15 13:06:58,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:58,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:58,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:58,569 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) [2022-02-15 13:06:58,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-15 13:06:58,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:06:58,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:58,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:06:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:58,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:58,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185738674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:58,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:58,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-15 13:06:58,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566555231] [2022-02-15 13:06:58,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:58,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:06:58,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:06:58,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:06:58,952 INFO L87 Difference]: Start difference. First operand 555 states and 1604 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-02-15 13:06:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:59,195 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2022-02-15 13:06:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:06:59,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 19 [2022-02-15 13:06:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:59,196 INFO L225 Difference]: With dead ends: 700 [2022-02-15 13:06:59,196 INFO L226 Difference]: Without dead ends: 684 [2022-02-15 13:06:59,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:06:59,197 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:59,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 370 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:59,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-15 13:06:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2022-02-15 13:06:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2022-02-15 13:06:59,204 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2022-02-15 13:06:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:59,204 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2022-02-15 13:06:59,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-02-15 13:06:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2022-02-15 13:06:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:06:59,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:59,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:59,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-15 13:06:59,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:59,419 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:06:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash 115788673, now seen corresponding path program 82 times [2022-02-15 13:06:59,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:59,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217209716] [2022-02-15 13:06:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:59,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:59,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217209716] [2022-02-15 13:06:59,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217209716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:59,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436166345] [2022-02-15 13:06:59,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:59,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:59,527 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) [2022-02-15 13:06:59,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-15 13:06:59,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:06:59,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436166345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:59,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:59,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 13:06:59,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201330458] [2022-02-15 13:06:59,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:59,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:06:59,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:06:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:06:59,899 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2022-02-15 13:07:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:00,150 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2022-02-15 13:07:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:07:00,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2022-02-15 13:07:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:00,152 INFO L225 Difference]: With dead ends: 698 [2022-02-15 13:07:00,152 INFO L226 Difference]: Without dead ends: 691 [2022-02-15 13:07:00,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:07:00,152 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 113 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:00,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 375 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-15 13:07:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2022-02-15 13:07:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2022-02-15 13:07:00,159 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2022-02-15 13:07:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:00,159 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2022-02-15 13:07:00,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2022-02-15 13:07:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2022-02-15 13:07:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:00,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:00,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:00,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-15 13:07:00,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:00,361 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash 651018475, now seen corresponding path program 83 times [2022-02-15 13:07:00,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:00,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433998606] [2022-02-15 13:07:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:00,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:00,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:00,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433998606] [2022-02-15 13:07:00,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433998606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:00,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700505298] [2022-02-15 13:07:00,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:00,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:00,478 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) [2022-02-15 13:07:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-15 13:07:00,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:00,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:00,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:00,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:00,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700505298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:00,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:00,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 13:07:00,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137459881] [2022-02-15 13:07:00,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:00,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:07:00,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:07:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:07:00,845 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2022-02-15 13:07:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:01,134 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2022-02-15 13:07:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:07:01,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 19 [2022-02-15 13:07:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:01,135 INFO L225 Difference]: With dead ends: 664 [2022-02-15 13:07:01,136 INFO L226 Difference]: Without dead ends: 657 [2022-02-15 13:07:01,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:07:01,136 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 97 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:01,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 400 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-02-15 13:07:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2022-02-15 13:07:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2022-02-15 13:07:01,156 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2022-02-15 13:07:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:01,156 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2022-02-15 13:07:01,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) [2022-02-15 13:07:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2022-02-15 13:07:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:01,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:01,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:01,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:01,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:01,358 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2144423449, now seen corresponding path program 84 times [2022-02-15 13:07:01,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:01,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308277754] [2022-02-15 13:07:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:01,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:01,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:01,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308277754] [2022-02-15 13:07:01,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308277754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:01,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895669154] [2022-02-15 13:07:01,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:01,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:01,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:01,445 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) [2022-02-15 13:07:01,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-15 13:07:01,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:01,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:01,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:01,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895669154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:01,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:01,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 20 [2022-02-15 13:07:01,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271300536] [2022-02-15 13:07:01,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:01,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:07:01,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:07:01,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:07:01,821 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2022-02-15 13:07:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:02,016 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2022-02-15 13:07:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:07:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 19 [2022-02-15 13:07:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:02,017 INFO L225 Difference]: With dead ends: 660 [2022-02-15 13:07:02,017 INFO L226 Difference]: Without dead ends: 653 [2022-02-15 13:07:02,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:07:02,017 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:02,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 342 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-15 13:07:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2022-02-15 13:07:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9097472924187726) internal successors, (1612), 554 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2022-02-15 13:07:02,025 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2022-02-15 13:07:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:02,025 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2022-02-15 13:07:02,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2022-02-15 13:07:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2022-02-15 13:07:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:02,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:02,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:02,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:02,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:02,226 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash -529720725, now seen corresponding path program 85 times [2022-02-15 13:07:02,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:02,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883368929] [2022-02-15 13:07:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:02,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:02,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:02,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883368929] [2022-02-15 13:07:02,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883368929] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:02,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982254547] [2022-02-15 13:07:02,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:02,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:02,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:02,315 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) [2022-02-15 13:07:02,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-15 13:07:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:02,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:02,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982254547] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:02,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:02,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2022-02-15 13:07:02,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871677621] [2022-02-15 13:07:02,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:02,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:07:02,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:02,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:07:02,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:07:02,690 INFO L87 Difference]: Start difference. First operand 555 states and 1612 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2022-02-15 13:07:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:02,878 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2022-02-15 13:07:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:07:02,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 19 [2022-02-15 13:07:02,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:02,880 INFO L225 Difference]: With dead ends: 661 [2022-02-15 13:07:02,880 INFO L226 Difference]: Without dead ends: 652 [2022-02-15 13:07:02,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:02,880 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:02,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 308 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-02-15 13:07:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2022-02-15 13:07:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2022-02-15 13:07:02,887 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2022-02-15 13:07:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:02,888 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2022-02-15 13:07:02,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2022-02-15 13:07:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2022-02-15 13:07:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:02,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:02,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:02,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:03,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-02-15 13:07:03,103 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1685952743, now seen corresponding path program 86 times [2022-02-15 13:07:03,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:03,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612027260] [2022-02-15 13:07:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:03,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:03,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:03,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612027260] [2022-02-15 13:07:03,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612027260] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:03,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863479186] [2022-02-15 13:07:03,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:03,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:03,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:03,213 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) [2022-02-15 13:07:03,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-15 13:07:03,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:03,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:03,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:03,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863479186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:03,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:03,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 19 [2022-02-15 13:07:03,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11197669] [2022-02-15 13:07:03,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:03,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:07:03,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:07:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:03,600 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-02-15 13:07:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:03,792 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2022-02-15 13:07:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:07:03,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 19 [2022-02-15 13:07:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:03,794 INFO L225 Difference]: With dead ends: 635 [2022-02-15 13:07:03,794 INFO L226 Difference]: Without dead ends: 628 [2022-02-15 13:07:03,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:07:03,794 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 302 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-02-15 13:07:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2022-02-15 13:07:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2022-02-15 13:07:03,801 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2022-02-15 13:07:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:03,801 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2022-02-15 13:07:03,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-02-15 13:07:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2022-02-15 13:07:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:03,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:03,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:03,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:04,013 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,SelfDestructingSolverStorable99 [2022-02-15 13:07:04,013 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1338674603, now seen corresponding path program 87 times [2022-02-15 13:07:04,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:04,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150849337] [2022-02-15 13:07:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:04,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:04,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:04,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150849337] [2022-02-15 13:07:04,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150849337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:04,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158459875] [2022-02-15 13:07:04,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:04,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:04,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:04,092 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) [2022-02-15 13:07:04,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-15 13:07:04,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:04,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:04,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:04,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158459875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:04,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:04,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-02-15 13:07:04,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238084357] [2022-02-15 13:07:04,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:07:04,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:07:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:07:04,442 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:04,717 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2022-02-15 13:07:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:07:04,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:04,719 INFO L225 Difference]: With dead ends: 776 [2022-02-15 13:07:04,719 INFO L226 Difference]: Without dead ends: 759 [2022-02-15 13:07:04,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:04,719 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 95 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:04,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 432 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-02-15 13:07:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2022-02-15 13:07:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9409780775716694) internal successors, (1744), 593 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2022-02-15 13:07:04,727 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2022-02-15 13:07:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:04,727 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2022-02-15 13:07:04,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2022-02-15 13:07:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:04,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:04,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:04,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-15 13:07:04,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-15 13:07:04,928 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1341589969, now seen corresponding path program 88 times [2022-02-15 13:07:04,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:04,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277970991] [2022-02-15 13:07:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:04,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:05,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:05,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277970991] [2022-02-15 13:07:05,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277970991] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:05,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060378295] [2022-02-15 13:07:05,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:05,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:05,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:05,035 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) [2022-02-15 13:07:05,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-15 13:07:05,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:05,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:05,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:05,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060378295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:05,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:05,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-02-15 13:07:05,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668731022] [2022-02-15 13:07:05,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:05,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:07:05,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:07:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:07:05,437 INFO L87 Difference]: Start difference. First operand 594 states and 1744 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:05,688 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2022-02-15 13:07:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:07:05,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:05,689 INFO L225 Difference]: With dead ends: 774 [2022-02-15 13:07:05,689 INFO L226 Difference]: Without dead ends: 756 [2022-02-15 13:07:05,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:07:05,690 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 128 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:05,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 391 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-02-15 13:07:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2022-02-15 13:07:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.922680412371134) internal successors, (1701), 582 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2022-02-15 13:07:05,697 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2022-02-15 13:07:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:05,697 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2022-02-15 13:07:05,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2022-02-15 13:07:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:05,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:05,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:05,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:05,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-15 13:07:05,913 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash 874083499, now seen corresponding path program 89 times [2022-02-15 13:07:05,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:05,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328143895] [2022-02-15 13:07:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:05,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:05,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:05,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328143895] [2022-02-15 13:07:05,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328143895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:05,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489172765] [2022-02-15 13:07:05,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:05,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:05,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:05,997 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) [2022-02-15 13:07:05,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-15 13:07:06,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:06,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:06,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:06,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489172765] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:06,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:06,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 19 [2022-02-15 13:07:06,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761266446] [2022-02-15 13:07:06,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:06,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:07:06,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:07:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:06,368 INFO L87 Difference]: Start difference. First operand 583 states and 1701 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:06,636 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2022-02-15 13:07:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:07:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:06,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:06,638 INFO L225 Difference]: With dead ends: 744 [2022-02-15 13:07:06,638 INFO L226 Difference]: Without dead ends: 722 [2022-02-15 13:07:06,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:06,638 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 108 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:06,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 353 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-02-15 13:07:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2022-02-15 13:07:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9153713298791017) internal successors, (1688), 579 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2022-02-15 13:07:06,646 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2022-02-15 13:07:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:06,646 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2022-02-15 13:07:06,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2022-02-15 13:07:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:06,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:06,647 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:06,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-15 13:07:06,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:06,856 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash 840484271, now seen corresponding path program 90 times [2022-02-15 13:07:06,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:06,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056859252] [2022-02-15 13:07:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:06,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:06,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:06,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056859252] [2022-02-15 13:07:06,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056859252] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:06,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769119403] [2022-02-15 13:07:06,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:06,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:06,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:06,964 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) [2022-02-15 13:07:06,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-15 13:07:06,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:06,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:06,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:06,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769119403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:07,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:07,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-02-15 13:07:07,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620630402] [2022-02-15 13:07:07,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:07,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:07:07,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:07:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:07:07,309 INFO L87 Difference]: Start difference. First operand 580 states and 1688 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:07,539 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2022-02-15 13:07:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:07:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:07,540 INFO L225 Difference]: With dead ends: 695 [2022-02-15 13:07:07,540 INFO L226 Difference]: Without dead ends: 688 [2022-02-15 13:07:07,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:07:07,540 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 99 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:07,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 325 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-02-15 13:07:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2022-02-15 13:07:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.910499139414802) internal successors, (1691), 581 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2022-02-15 13:07:07,548 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2022-02-15 13:07:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:07,548 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2022-02-15 13:07:07,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2022-02-15 13:07:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:07,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:07,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:07,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-15 13:07:07,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-15 13:07:07,763 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1868116993, now seen corresponding path program 91 times [2022-02-15 13:07:07,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:07,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413529876] [2022-02-15 13:07:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:07,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:07,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413529876] [2022-02-15 13:07:07,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413529876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:07,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933946472] [2022-02-15 13:07:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:07,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:07,848 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:07,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-15 13:07:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:07,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:08,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:08,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933946472] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:08,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:08,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 19 [2022-02-15 13:07:08,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913174868] [2022-02-15 13:07:08,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:08,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:07:08,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:07:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:08,227 INFO L87 Difference]: Start difference. First operand 582 states and 1691 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:08,394 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2022-02-15 13:07:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:07:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:08,396 INFO L225 Difference]: With dead ends: 647 [2022-02-15 13:07:08,396 INFO L226 Difference]: Without dead ends: 634 [2022-02-15 13:07:08,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:07:08,396 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 79 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:08,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 228 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-02-15 13:07:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2022-02-15 13:07:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.907986111111111) internal successors, (1675), 576 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2022-02-15 13:07:08,416 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2022-02-15 13:07:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:08,416 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2022-02-15 13:07:08,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2022-02-15 13:07:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:08,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:08,417 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:08,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:08,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-15 13:07:08,633 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1940531815, now seen corresponding path program 92 times [2022-02-15 13:07:08,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:08,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004905030] [2022-02-15 13:07:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:08,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:08,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:08,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004905030] [2022-02-15 13:07:08,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004905030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:08,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254470698] [2022-02-15 13:07:08,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:08,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:08,739 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:08,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-15 13:07:08,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:08,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:08,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:09,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254470698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:09,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:09,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-15 13:07:09,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697622714] [2022-02-15 13:07:09,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:09,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:07:09,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:09,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:07:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:07:09,222 INFO L87 Difference]: Start difference. First operand 577 states and 1675 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2022-02-15 13:07:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:09,492 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2022-02-15 13:07:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:07:09,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 19 [2022-02-15 13:07:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:09,494 INFO L225 Difference]: With dead ends: 798 [2022-02-15 13:07:09,494 INFO L226 Difference]: Without dead ends: 781 [2022-02-15 13:07:09,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:09,494 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:09,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 449 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-02-15 13:07:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2022-02-15 13:07:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.9334389857369256) internal successors, (1851), 631 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2022-02-15 13:07:09,502 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2022-02-15 13:07:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:09,502 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2022-02-15 13:07:09,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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) [2022-02-15 13:07:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2022-02-15 13:07:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:09,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:09,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:09,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:09,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-02-15 13:07:09,716 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash -739732757, now seen corresponding path program 93 times [2022-02-15 13:07:09,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:09,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188990236] [2022-02-15 13:07:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:09,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:09,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:09,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188990236] [2022-02-15 13:07:09,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188990236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:09,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391696122] [2022-02-15 13:07:09,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:09,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:09,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:09,832 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:09,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-15 13:07:09,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:09,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:09,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:09,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:10,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391696122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:10,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:10,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-15 13:07:10,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031115050] [2022-02-15 13:07:10,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:10,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:07:10,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:10,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:07:10,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:07:10,203 INFO L87 Difference]: Start difference. First operand 632 states and 1851 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-02-15 13:07:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:10,442 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2022-02-15 13:07:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:07:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 19 [2022-02-15 13:07:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:10,444 INFO L225 Difference]: With dead ends: 796 [2022-02-15 13:07:10,444 INFO L226 Difference]: Without dead ends: 780 [2022-02-15 13:07:10,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:07:10,444 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 140 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:10,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 402 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-02-15 13:07:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2022-02-15 13:07:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.92258064516129) internal successors, (1812), 620 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2022-02-15 13:07:10,452 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2022-02-15 13:07:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:10,452 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2022-02-15 13:07:10,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2022-02-15 13:07:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2022-02-15 13:07:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:10,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:10,453 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:10,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:10,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-02-15 13:07:10,667 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1475940711, now seen corresponding path program 94 times [2022-02-15 13:07:10,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:10,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674237380] [2022-02-15 13:07:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:10,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:10,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:10,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674237380] [2022-02-15 13:07:10,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674237380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:10,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930225313] [2022-02-15 13:07:10,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:10,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:10,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:10,755 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:10,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-15 13:07:10,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:10,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:10,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:11,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930225313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:11,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:11,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-15 13:07:11,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734764332] [2022-02-15 13:07:11,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:11,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:07:11,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:07:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:11,105 INFO L87 Difference]: Start difference. First operand 621 states and 1812 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2022-02-15 13:07:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:11,380 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2022-02-15 13:07:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:07:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 19 [2022-02-15 13:07:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:11,382 INFO L225 Difference]: With dead ends: 809 [2022-02-15 13:07:11,382 INFO L226 Difference]: Without dead ends: 791 [2022-02-15 13:07:11,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:11,382 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 98 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:11,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 427 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-15 13:07:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2022-02-15 13:07:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2022-02-15 13:07:11,389 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2022-02-15 13:07:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:11,389 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2022-02-15 13:07:11,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2022-02-15 13:07:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2022-02-15 13:07:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:11,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:11,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:11,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:11,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:11,599 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1442341483, now seen corresponding path program 95 times [2022-02-15 13:07:11,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:11,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092806888] [2022-02-15 13:07:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:11,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:11,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:11,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092806888] [2022-02-15 13:07:11,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092806888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:11,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685802046] [2022-02-15 13:07:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:11,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:11,705 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:11,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-15 13:07:11,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:11,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:11,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:12,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685802046] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:12,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:12,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-15 13:07:12,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61451656] [2022-02-15 13:07:12,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:12,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:07:12,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:07:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:07:12,049 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-02-15 13:07:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:12,353 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2022-02-15 13:07:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:07:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 19 [2022-02-15 13:07:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:12,355 INFO L225 Difference]: With dead ends: 764 [2022-02-15 13:07:12,355 INFO L226 Difference]: Without dead ends: 744 [2022-02-15 13:07:12,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:12,355 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 103 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:12,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 369 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-15 13:07:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2022-02-15 13:07:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.9141914191419143) internal successors, (1766), 606 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2022-02-15 13:07:12,362 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2022-02-15 13:07:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:12,363 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2022-02-15 13:07:12,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-02-15 13:07:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2022-02-15 13:07:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:12,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:12,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:12,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-15 13:07:12,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:12,564 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash 400765415, now seen corresponding path program 96 times [2022-02-15 13:07:12,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:12,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247706596] [2022-02-15 13:07:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:12,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:12,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:12,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247706596] [2022-02-15 13:07:12,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247706596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:12,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578429293] [2022-02-15 13:07:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:12,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:12,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:12,662 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:12,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-15 13:07:12,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:07:12,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:12,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:12,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:12,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:13,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578429293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:13,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:13,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-15 13:07:13,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621213697] [2022-02-15 13:07:13,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:13,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:07:13,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:13,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:07:13,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:13,001 INFO L87 Difference]: Start difference. First operand 607 states and 1766 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2022-02-15 13:07:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:13,278 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2022-02-15 13:07:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:07:13,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 19 [2022-02-15 13:07:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:13,279 INFO L225 Difference]: With dead ends: 713 [2022-02-15 13:07:13,279 INFO L226 Difference]: Without dead ends: 706 [2022-02-15 13:07:13,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:07:13,280 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:13,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 388 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:13,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-02-15 13:07:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2022-02-15 13:07:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8957654723127035) internal successors, (1778), 614 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2022-02-15 13:07:13,287 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2022-02-15 13:07:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:13,287 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2022-02-15 13:07:13,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2022-02-15 13:07:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2022-02-15 13:07:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:13,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:13,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:13,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:13,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:13,489 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1510649617, now seen corresponding path program 97 times [2022-02-15 13:07:13,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:13,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810102957] [2022-02-15 13:07:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:13,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:13,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:13,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810102957] [2022-02-15 13:07:13,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810102957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:13,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267286512] [2022-02-15 13:07:13,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:13,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:13,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:13,572 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:13,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-15 13:07:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:13,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:13,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:13,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267286512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:13,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:13,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 20 [2022-02-15 13:07:13,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082586711] [2022-02-15 13:07:13,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:07:13,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:07:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:07:13,956 INFO L87 Difference]: Start difference. First operand 615 states and 1778 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:14,126 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2022-02-15 13:07:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:07:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:14,128 INFO L225 Difference]: With dead ends: 753 [2022-02-15 13:07:14,128 INFO L226 Difference]: Without dead ends: 743 [2022-02-15 13:07:14,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:07:14,129 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:14,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 272 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-02-15 13:07:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2022-02-15 13:07:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.905750798722045) internal successors, (1819), 626 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2022-02-15 13:07:14,136 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2022-02-15 13:07:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:14,136 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2022-02-15 13:07:14,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2022-02-15 13:07:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:14,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:14,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:14,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-15 13:07:14,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:14,338 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash 104053107, now seen corresponding path program 98 times [2022-02-15 13:07:14,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:14,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029366253] [2022-02-15 13:07:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:14,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:14,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:14,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029366253] [2022-02-15 13:07:14,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029366253] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:14,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534332105] [2022-02-15 13:07:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:14,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:14,438 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:14,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-15 13:07:14,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:14,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:14,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:14,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534332105] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:14,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:14,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2022-02-15 13:07:14,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116169311] [2022-02-15 13:07:14,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:14,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:07:14,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:07:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:07:14,805 INFO L87 Difference]: Start difference. First operand 627 states and 1819 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:14,972 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2022-02-15 13:07:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:07:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:14,974 INFO L225 Difference]: With dead ends: 735 [2022-02-15 13:07:14,974 INFO L226 Difference]: Without dead ends: 728 [2022-02-15 13:07:14,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:07:14,974 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 120 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:14,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 293 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-15 13:07:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2022-02-15 13:07:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.90224358974359) internal successors, (1811), 624 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2022-02-15 13:07:14,982 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2022-02-15 13:07:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:14,982 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2022-02-15 13:07:14,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2022-02-15 13:07:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:14,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:14,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:14,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:15,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-15 13:07:15,198 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:15,198 INFO L85 PathProgramCache]: Analyzing trace with hash -939194811, now seen corresponding path program 99 times [2022-02-15 13:07:15,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:15,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437186994] [2022-02-15 13:07:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:15,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:15,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:15,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437186994] [2022-02-15 13:07:15,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437186994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:15,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494708358] [2022-02-15 13:07:15,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:15,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:15,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:15,292 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:15,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-15 13:07:15,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:07:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:15,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:15,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:15,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494708358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:15,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:15,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 19 [2022-02-15 13:07:15,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903656294] [2022-02-15 13:07:15,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:15,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:07:15,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:07:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:15,654 INFO L87 Difference]: Start difference. First operand 625 states and 1811 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:15,856 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2022-02-15 13:07:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:07:15,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:15,858 INFO L225 Difference]: With dead ends: 709 [2022-02-15 13:07:15,858 INFO L226 Difference]: Without dead ends: 702 [2022-02-15 13:07:15,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:07:15,858 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:15,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 312 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-15 13:07:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2022-02-15 13:07:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.9020866773675764) internal successors, (1808), 623 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2022-02-15 13:07:15,869 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2022-02-15 13:07:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:15,869 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2022-02-15 13:07:15,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2022-02-15 13:07:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:15,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:15,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:15,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-15 13:07:16,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-15 13:07:16,070 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:16,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1123091609, now seen corresponding path program 100 times [2022-02-15 13:07:16,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:16,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377086858] [2022-02-15 13:07:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:16,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:16,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:16,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377086858] [2022-02-15 13:07:16,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377086858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:16,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346085272] [2022-02-15 13:07:16,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:16,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:16,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:16,196 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:16,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-15 13:07:16,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:16,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:16,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:16,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:16,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346085272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:16,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:16,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-02-15 13:07:16,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443259545] [2022-02-15 13:07:16,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:16,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:07:16,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:07:16,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:07:16,574 INFO L87 Difference]: Start difference. First operand 624 states and 1808 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:16,792 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2022-02-15 13:07:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:07:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:07:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:16,794 INFO L225 Difference]: With dead ends: 809 [2022-02-15 13:07:16,794 INFO L226 Difference]: Without dead ends: 799 [2022-02-15 13:07:16,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:07:16,794 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:16,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 368 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-02-15 13:07:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2022-02-15 13:07:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9175738724727838) internal successors, (1876), 643 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2022-02-15 13:07:16,802 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2022-02-15 13:07:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:16,802 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2022-02-15 13:07:16,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2022-02-15 13:07:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:16,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:16,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:16,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:17,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-15 13:07:17,003 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 491611115, now seen corresponding path program 101 times [2022-02-15 13:07:17,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:17,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333097448] [2022-02-15 13:07:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:17,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:17,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:17,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333097448] [2022-02-15 13:07:17,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333097448] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:17,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731470915] [2022-02-15 13:07:17,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:17,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:17,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:17,091 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:17,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-15 13:07:17,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:17,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:17,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:17,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:17,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:17,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731470915] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:17,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:17,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-02-15 13:07:17,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127300441] [2022-02-15 13:07:17,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:17,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:07:17,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:17,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:07:17,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:07:17,451 INFO L87 Difference]: Start difference. First operand 644 states and 1876 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 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) [2022-02-15 13:07:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:17,699 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2022-02-15 13:07:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:07:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 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 19 [2022-02-15 13:07:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:17,701 INFO L225 Difference]: With dead ends: 793 [2022-02-15 13:07:17,701 INFO L226 Difference]: Without dead ends: 786 [2022-02-15 13:07:17,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:17,701 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:17,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 454 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-02-15 13:07:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2022-02-15 13:07:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2022-02-15 13:07:17,709 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2022-02-15 13:07:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:17,709 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2022-02-15 13:07:17,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 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) [2022-02-15 13:07:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2022-02-15 13:07:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:17,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:17,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:17,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-15 13:07:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-15 13:07:17,915 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:17,915 INFO L85 PathProgramCache]: Analyzing trace with hash -551636803, now seen corresponding path program 102 times [2022-02-15 13:07:17,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:17,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421355705] [2022-02-15 13:07:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:17,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:18,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:18,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421355705] [2022-02-15 13:07:18,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421355705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:18,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087720772] [2022-02-15 13:07:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:18,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:18,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:18,013 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:18,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-15 13:07:18,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:18,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:18,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:18,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087720772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:18,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:18,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 19 [2022-02-15 13:07:18,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921195887] [2022-02-15 13:07:18,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:18,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:07:18,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:07:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:18,370 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2022-02-15 13:07:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:18,606 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2022-02-15 13:07:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:07:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 19 [2022-02-15 13:07:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:18,608 INFO L225 Difference]: With dead ends: 788 [2022-02-15 13:07:18,608 INFO L226 Difference]: Without dead ends: 775 [2022-02-15 13:07:18,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:07:18,608 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:18,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 353 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-02-15 13:07:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2022-02-15 13:07:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9089481946624804) internal successors, (1853), 637 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2022-02-15 13:07:18,616 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2022-02-15 13:07:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2022-02-15 13:07:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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) [2022-02-15 13:07:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2022-02-15 13:07:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:07:18,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:18,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:18,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:18,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-02-15 13:07:18,827 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash -16407001, now seen corresponding path program 103 times [2022-02-15 13:07:18,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:18,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410874814] [2022-02-15 13:07:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:18,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:18,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410874814] [2022-02-15 13:07:18,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410874814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:18,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261466383] [2022-02-15 13:07:18,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:18,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:18,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:18,918 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:18,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-15 13:07:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:18,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:07:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261466383] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:19,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:19,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-02-15 13:07:19,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349074567] [2022-02-15 13:07:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:19,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:07:19,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:07:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:07:19,277 INFO L87 Difference]: Start difference. First operand 638 states and 1853 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-02-15 13:07:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:19,489 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2022-02-15 13:07:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:07:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 19 [2022-02-15 13:07:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:19,491 INFO L225 Difference]: With dead ends: 748 [2022-02-15 13:07:19,491 INFO L226 Difference]: Without dead ends: 741 [2022-02-15 13:07:19,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:07:19,492 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:19,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 300 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-02-15 13:07:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2022-02-15 13:07:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.9086614173228345) internal successors, (1847), 635 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2022-02-15 13:07:19,499 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2022-02-15 13:07:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:19,499 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2022-02-15 13:07:19,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-02-15 13:07:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2022-02-15 13:07:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:19,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:19,500 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:19,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:19,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-15 13:07:19,701 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:19,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:19,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1231124503, now seen corresponding path program 104 times [2022-02-15 13:07:19,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:19,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216562539] [2022-02-15 13:07:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:19,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:19,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216562539] [2022-02-15 13:07:19,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216562539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:19,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307755621] [2022-02-15 13:07:19,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:19,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:19,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:19,746 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:19,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-15 13:07:19,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:19,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:19,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:19,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307755621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:19,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:19,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-02-15 13:07:19,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183932351] [2022-02-15 13:07:19,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:19,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:19,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:19,870 INFO L87 Difference]: Start difference. First operand 636 states and 1847 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:19,978 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2022-02-15 13:07:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:07:19,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:19,980 INFO L225 Difference]: With dead ends: 972 [2022-02-15 13:07:19,980 INFO L226 Difference]: Without dead ends: 955 [2022-02-15 13:07:19,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:07:19,980 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:19,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 109 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-02-15 13:07:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2022-02-15 13:07:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.9158730158730157) internal successors, (1837), 630 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2022-02-15 13:07:19,989 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2022-02-15 13:07:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:19,989 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2022-02-15 13:07:19,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2022-02-15 13:07:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:19,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:19,990 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:20,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-15 13:07:20,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:20,190 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:20,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1715049991, now seen corresponding path program 105 times [2022-02-15 13:07:20,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:20,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822108728] [2022-02-15 13:07:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:20,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:20,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822108728] [2022-02-15 13:07:20,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822108728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:20,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276969252] [2022-02-15 13:07:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:20,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:20,246 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:20,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-15 13:07:20,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276969252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:20,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:20,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-02-15 13:07:20,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560354884] [2022-02-15 13:07:20,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:20,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:20,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:20,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:20,350 INFO L87 Difference]: Start difference. First operand 631 states and 1837 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:20,428 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2022-02-15 13:07:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:07:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:20,429 INFO L225 Difference]: With dead ends: 996 [2022-02-15 13:07:20,429 INFO L226 Difference]: Without dead ends: 996 [2022-02-15 13:07:20,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:20,430 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:20,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 68 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:20,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-02-15 13:07:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2022-02-15 13:07:20,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.9183359013867487) internal successors, (1894), 649 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:20,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2022-02-15 13:07:20,459 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2022-02-15 13:07:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:20,459 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2022-02-15 13:07:20,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2022-02-15 13:07:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:20,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:20,460 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:20,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:20,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:20,675 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -77943029, now seen corresponding path program 106 times [2022-02-15 13:07:20,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:20,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980550970] [2022-02-15 13:07:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:20,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:20,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980550970] [2022-02-15 13:07:20,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980550970] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:20,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937010776] [2022-02-15 13:07:20,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:20,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:20,712 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:20,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-15 13:07:20,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937010776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:20,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:20,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:20,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672458350] [2022-02-15 13:07:20,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:20,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:20,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:20,831 INFO L87 Difference]: Start difference. First operand 650 states and 1894 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:21,123 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2022-02-15 13:07:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:07:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:21,125 INFO L225 Difference]: With dead ends: 1332 [2022-02-15 13:07:21,125 INFO L226 Difference]: Without dead ends: 1326 [2022-02-15 13:07:21,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:07:21,126 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:21,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-02-15 13:07:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2022-02-15 13:07:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.0063613231552164) internal successors, (2363), 786 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2022-02-15 13:07:21,137 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2022-02-15 13:07:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:21,137 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2022-02-15 13:07:21,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2022-02-15 13:07:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:21,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:21,138 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:21,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-02-15 13:07:21,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-02-15 13:07:21,339 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 493511777, now seen corresponding path program 107 times [2022-02-15 13:07:21,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:21,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459482838] [2022-02-15 13:07:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:21,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:21,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:21,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459482838] [2022-02-15 13:07:21,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459482838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:21,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580358932] [2022-02-15 13:07:21,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:21,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:21,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:21,381 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:21,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-15 13:07:21,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:21,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:21,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:21,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580358932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:21,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:21,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:21,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396325465] [2022-02-15 13:07:21,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:21,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:21,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:21,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:21,493 INFO L87 Difference]: Start difference. First operand 787 states and 2363 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:21,832 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2022-02-15 13:07:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:07:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:21,834 INFO L225 Difference]: With dead ends: 1321 [2022-02-15 13:07:21,834 INFO L226 Difference]: Without dead ends: 1315 [2022-02-15 13:07:21,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:07:21,835 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:21,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 183 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-02-15 13:07:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2022-02-15 13:07:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.9464285714285716) internal successors, (2145), 728 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2022-02-15 13:07:21,850 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2022-02-15 13:07:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:21,851 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2022-02-15 13:07:21,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2022-02-15 13:07:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:21,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:21,852 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:21,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-15 13:07:22,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:22,055 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:22,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1438059769, now seen corresponding path program 108 times [2022-02-15 13:07:22,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:22,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704495950] [2022-02-15 13:07:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:22,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:22,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704495950] [2022-02-15 13:07:22,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704495950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:22,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214574956] [2022-02-15 13:07:22,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:22,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:22,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:22,111 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:22,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-15 13:07:22,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214574956] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:22,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:22,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:22,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725789268] [2022-02-15 13:07:22,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:22,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:22,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:22,247 INFO L87 Difference]: Start difference. First operand 729 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:22,581 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2022-02-15 13:07:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:07:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:22,583 INFO L225 Difference]: With dead ends: 1177 [2022-02-15 13:07:22,583 INFO L226 Difference]: Without dead ends: 1177 [2022-02-15 13:07:22,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:07:22,584 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:22,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 130 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-02-15 13:07:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2022-02-15 13:07:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.971279373368146) internal successors, (2276), 766 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2022-02-15 13:07:22,594 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2022-02-15 13:07:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:22,594 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2022-02-15 13:07:22,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2022-02-15 13:07:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:22,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:22,595 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:22,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-15 13:07:22,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:22,795 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1902650873, now seen corresponding path program 109 times [2022-02-15 13:07:22,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:22,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193372867] [2022-02-15 13:07:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:22,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:22,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193372867] [2022-02-15 13:07:22,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193372867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:22,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695851544] [2022-02-15 13:07:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:22,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:22,838 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:22,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-15 13:07:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:22,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695851544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:22,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:22,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:22,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927333891] [2022-02-15 13:07:22,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:22,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:22,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:22,958 INFO L87 Difference]: Start difference. First operand 767 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:23,295 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2022-02-15 13:07:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:07:23,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:23,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:23,297 INFO L225 Difference]: With dead ends: 1009 [2022-02-15 13:07:23,297 INFO L226 Difference]: Without dead ends: 1005 [2022-02-15 13:07:23,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:07:23,297 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:23,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 135 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-02-15 13:07:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2022-02-15 13:07:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9283667621776504) internal successors, (2044), 698 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2022-02-15 13:07:23,311 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2022-02-15 13:07:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:23,311 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2022-02-15 13:07:23,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2022-02-15 13:07:23,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:23,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:23,312 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:23,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:23,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-15 13:07:23,528 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1028741579, now seen corresponding path program 110 times [2022-02-15 13:07:23,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:23,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708050709] [2022-02-15 13:07:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:23,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:23,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:23,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708050709] [2022-02-15 13:07:23,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708050709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:23,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024952830] [2022-02-15 13:07:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:23,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:23,568 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:23,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-15 13:07:23,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:23,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:23,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:23,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024952830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:23,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:23,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:23,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468237948] [2022-02-15 13:07:23,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:23,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:23,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:23,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:23,679 INFO L87 Difference]: Start difference. First operand 699 states and 2044 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:23,984 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2022-02-15 13:07:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:07:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:23,986 INFO L225 Difference]: With dead ends: 1249 [2022-02-15 13:07:23,986 INFO L226 Difference]: Without dead ends: 1240 [2022-02-15 13:07:23,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:07:23,987 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:23,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 125 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-02-15 13:07:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2022-02-15 13:07:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.936376210235131) internal successors, (2123), 723 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2022-02-15 13:07:23,997 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2022-02-15 13:07:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:23,997 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2022-02-15 13:07:23,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2022-02-15 13:07:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:23,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:23,998 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:24,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-15 13:07:24,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:24,198 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash 440996257, now seen corresponding path program 111 times [2022-02-15 13:07:24,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:24,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585371577] [2022-02-15 13:07:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:24,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:24,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585371577] [2022-02-15 13:07:24,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585371577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:24,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969331828] [2022-02-15 13:07:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:24,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:24,238 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:24,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-15 13:07:24,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969331828] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:24,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:24,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:24,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83747785] [2022-02-15 13:07:24,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:24,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:24,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:24,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:24,354 INFO L87 Difference]: Start difference. First operand 724 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:24,630 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2022-02-15 13:07:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:07:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:24,632 INFO L225 Difference]: With dead ends: 1262 [2022-02-15 13:07:24,632 INFO L226 Difference]: Without dead ends: 1250 [2022-02-15 13:07:24,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:07:24,632 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 186 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:24,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 122 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-02-15 13:07:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2022-02-15 13:07:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.9263301500682126) internal successors, (2145), 733 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2022-02-15 13:07:24,649 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2022-02-15 13:07:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:24,649 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2022-02-15 13:07:24,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2022-02-15 13:07:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:24,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:24,650 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:24,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-15 13:07:24,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-15 13:07:24,851 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:24,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -599239541, now seen corresponding path program 112 times [2022-02-15 13:07:24,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:24,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905930037] [2022-02-15 13:07:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:24,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:24,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905930037] [2022-02-15 13:07:24,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905930037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:24,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671252410] [2022-02-15 13:07:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:24,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:24,894 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:24,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-15 13:07:24,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:24,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:25,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671252410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:25,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:25,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:25,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68309507] [2022-02-15 13:07:25,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:25,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:25,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:25,006 INFO L87 Difference]: Start difference. First operand 734 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:25,206 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2022-02-15 13:07:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:07:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:25,208 INFO L225 Difference]: With dead ends: 1109 [2022-02-15 13:07:25,208 INFO L226 Difference]: Without dead ends: 1097 [2022-02-15 13:07:25,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:07:25,208 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:25,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 117 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-02-15 13:07:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2022-02-15 13:07:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.922237380627558) internal successors, (2142), 733 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2022-02-15 13:07:25,218 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2022-02-15 13:07:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:25,218 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2022-02-15 13:07:25,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2022-02-15 13:07:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:25,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:25,219 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:25,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-15 13:07:25,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-15 13:07:25,420 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2045038283, now seen corresponding path program 113 times [2022-02-15 13:07:25,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:25,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828130634] [2022-02-15 13:07:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:25,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:25,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:25,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828130634] [2022-02-15 13:07:25,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828130634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:25,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587471693] [2022-02-15 13:07:25,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:25,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:25,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:25,464 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:25,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-15 13:07:25,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:25,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:25,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:25,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587471693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:25,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:25,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-02-15 13:07:25,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687591854] [2022-02-15 13:07:25,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:25,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:25,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:25,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:25,590 INFO L87 Difference]: Start difference. First operand 734 states and 2142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:25,892 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2022-02-15 13:07:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:07:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:25,894 INFO L225 Difference]: With dead ends: 1207 [2022-02-15 13:07:25,894 INFO L226 Difference]: Without dead ends: 1201 [2022-02-15 13:07:25,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:07:25,895 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:25,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 143 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-02-15 13:07:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2022-02-15 13:07:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.9479034307496823) internal successors, (2320), 787 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2022-02-15 13:07:25,906 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2022-02-15 13:07:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:25,906 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2022-02-15 13:07:25,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2022-02-15 13:07:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:25,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:25,907 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:25,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:26,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:26,109 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:26,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1580447179, now seen corresponding path program 114 times [2022-02-15 13:07:26,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:26,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427082412] [2022-02-15 13:07:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:26,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:26,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:26,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427082412] [2022-02-15 13:07:26,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427082412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:26,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406772307] [2022-02-15 13:07:26,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:26,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:26,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:26,150 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:26,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-15 13:07:26,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:07:26,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:26,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:26,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406772307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:26,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:26,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-02-15 13:07:26,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071882244] [2022-02-15 13:07:26,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:26,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:26,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:26,272 INFO L87 Difference]: Start difference. First operand 788 states and 2320 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:26,630 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2022-02-15 13:07:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:07:26,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:26,632 INFO L225 Difference]: With dead ends: 1081 [2022-02-15 13:07:26,632 INFO L226 Difference]: Without dead ends: 1075 [2022-02-15 13:07:26,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:07:26,633 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:26,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 127 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-02-15 13:07:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2022-02-15 13:07:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.9117241379310346) internal successors, (2111), 725 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2022-02-15 13:07:26,643 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2022-02-15 13:07:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:26,643 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2022-02-15 13:07:26,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2022-02-15 13:07:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:26,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:26,644 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:26,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-02-15 13:07:26,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:26,851 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1546847951, now seen corresponding path program 115 times [2022-02-15 13:07:26,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:26,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192516441] [2022-02-15 13:07:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:26,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:26,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:26,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192516441] [2022-02-15 13:07:26,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192516441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:26,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770330245] [2022-02-15 13:07:26,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:26,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:26,898 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:26,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-15 13:07:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:26,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:27,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770330245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:27,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:27,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-15 13:07:27,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128891340] [2022-02-15 13:07:27,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:27,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:27,025 INFO L87 Difference]: Start difference. First operand 726 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:27,366 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2022-02-15 13:07:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:07:27,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:27,368 INFO L225 Difference]: With dead ends: 974 [2022-02-15 13:07:27,368 INFO L226 Difference]: Without dead ends: 966 [2022-02-15 13:07:27,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:07:27,368 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:27,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 127 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-02-15 13:07:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2022-02-15 13:07:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.917119565217391) internal successors, (2147), 736 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2022-02-15 13:07:27,377 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2022-02-15 13:07:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:27,377 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2022-02-15 13:07:27,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2022-02-15 13:07:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:27,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:27,378 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:27,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:27,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-15 13:07:27,579 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1648071801, now seen corresponding path program 116 times [2022-02-15 13:07:27,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:27,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458200636] [2022-02-15 13:07:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:27,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:27,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:27,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458200636] [2022-02-15 13:07:27,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458200636] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:27,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607885936] [2022-02-15 13:07:27,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:27,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:27,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:27,616 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:27,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-15 13:07:27,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:27,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:27,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:27,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607885936] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:27,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:27,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-02-15 13:07:27,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971042698] [2022-02-15 13:07:27,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:27,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:27,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:27,755 INFO L87 Difference]: Start difference. First operand 737 states and 2147 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:28,028 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2022-02-15 13:07:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:07:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:28,031 INFO L225 Difference]: With dead ends: 1269 [2022-02-15 13:07:28,031 INFO L226 Difference]: Without dead ends: 1260 [2022-02-15 13:07:28,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:28,031 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 172 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:28,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 118 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-02-15 13:07:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2022-02-15 13:07:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.9404617253948966) internal successors, (2420), 823 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2022-02-15 13:07:28,043 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2022-02-15 13:07:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:28,043 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2022-02-15 13:07:28,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2022-02-15 13:07:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:28,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:28,044 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:28,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-15 13:07:28,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-15 13:07:28,244 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2112662905, now seen corresponding path program 117 times [2022-02-15 13:07:28,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:28,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132285918] [2022-02-15 13:07:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:28,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:28,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:28,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132285918] [2022-02-15 13:07:28,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132285918] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:28,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968013237] [2022-02-15 13:07:28,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:28,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:28,302 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:28,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-15 13:07:28,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:07:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:28,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:28,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968013237] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:28,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:28,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-02-15 13:07:28,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664536368] [2022-02-15 13:07:28,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:28,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:28,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:28,424 INFO L87 Difference]: Start difference. First operand 824 states and 2420 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:28,832 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2022-02-15 13:07:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:07:28,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:28,834 INFO L225 Difference]: With dead ends: 1150 [2022-02-15 13:07:28,834 INFO L226 Difference]: Without dead ends: 1144 [2022-02-15 13:07:28,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:07:28,835 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:28,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 146 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-02-15 13:07:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2022-02-15 13:07:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.9168765743073046) internal successors, (2316), 794 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2022-02-15 13:07:28,849 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2022-02-15 13:07:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:28,849 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2022-02-15 13:07:28,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2022-02-15 13:07:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:28,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:28,851 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:28,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:29,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:29,066 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2146262133, now seen corresponding path program 118 times [2022-02-15 13:07:29,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:29,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911191455] [2022-02-15 13:07:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:29,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:29,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:29,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911191455] [2022-02-15 13:07:29,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911191455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:29,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632605749] [2022-02-15 13:07:29,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:29,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:29,103 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:29,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-15 13:07:29,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:29,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:29,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632605749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:29,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:29,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-02-15 13:07:29,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506203522] [2022-02-15 13:07:29,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:29,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:29,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:29,229 INFO L87 Difference]: Start difference. First operand 795 states and 2316 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:29,600 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2022-02-15 13:07:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:07:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:29,602 INFO L225 Difference]: With dead ends: 1155 [2022-02-15 13:07:29,603 INFO L226 Difference]: Without dead ends: 1147 [2022-02-15 13:07:29,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:07:29,603 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:29,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 147 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-02-15 13:07:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2022-02-15 13:07:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.9289340101522843) internal successors, (2308), 788 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2022-02-15 13:07:29,614 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2022-02-15 13:07:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:29,614 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2022-02-15 13:07:29,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2022-02-15 13:07:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:29,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:29,615 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:29,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-15 13:07:29,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:29,815 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:29,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1107129095, now seen corresponding path program 119 times [2022-02-15 13:07:29,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:29,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604215801] [2022-02-15 13:07:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:29,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:29,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:29,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604215801] [2022-02-15 13:07:29,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604215801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:29,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614015501] [2022-02-15 13:07:29,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:29,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:29,857 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:29,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-15 13:07:29,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:29,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:29,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:29,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:29,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:29,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614015501] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:29,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:29,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-15 13:07:29,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214460416] [2022-02-15 13:07:29,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:29,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:07:29,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:29,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:07:29,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:29,986 INFO L87 Difference]: Start difference. First operand 789 states and 2308 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:30,323 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2022-02-15 13:07:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:07:30,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:30,325 INFO L225 Difference]: With dead ends: 1081 [2022-02-15 13:07:30,325 INFO L226 Difference]: Without dead ends: 1069 [2022-02-15 13:07:30,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:07:30,325 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:30,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 129 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-02-15 13:07:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2022-02-15 13:07:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.9294554455445545) internal successors, (2367), 808 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2022-02-15 13:07:30,335 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2022-02-15 13:07:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:30,335 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2022-02-15 13:07:30,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2022-02-15 13:07:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:30,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:30,336 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:30,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:30,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:30,537 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash -170367413, now seen corresponding path program 120 times [2022-02-15 13:07:30,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:30,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951025479] [2022-02-15 13:07:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:30,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:30,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:30,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951025479] [2022-02-15 13:07:30,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951025479] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:30,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578307175] [2022-02-15 13:07:30,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:30,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:30,571 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:30,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-15 13:07:30,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:30,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:30,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:30,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578307175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:30,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:30,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-02-15 13:07:30,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384970954] [2022-02-15 13:07:30,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:30,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:30,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:30,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:30,725 INFO L87 Difference]: Start difference. First operand 809 states and 2367 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:31,024 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2022-02-15 13:07:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:07:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:31,027 INFO L225 Difference]: With dead ends: 1520 [2022-02-15 13:07:31,027 INFO L226 Difference]: Without dead ends: 1514 [2022-02-15 13:07:31,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:31,027 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:31,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 156 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-02-15 13:07:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2022-02-15 13:07:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.9898785425101213) internal successors, (2954), 988 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2022-02-15 13:07:31,041 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2022-02-15 13:07:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:31,042 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2022-02-15 13:07:31,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2022-02-15 13:07:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:31,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:31,043 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:31,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:31,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-15 13:07:31,245 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash -634958517, now seen corresponding path program 121 times [2022-02-15 13:07:31,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:31,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633564136] [2022-02-15 13:07:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:31,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:31,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:31,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633564136] [2022-02-15 13:07:31,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633564136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:31,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218030435] [2022-02-15 13:07:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:31,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:31,275 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:31,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-15 13:07:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:31,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:31,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218030435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:31,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:31,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-02-15 13:07:31,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676321523] [2022-02-15 13:07:31,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:31,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:31,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:31,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:31,402 INFO L87 Difference]: Start difference. First operand 989 states and 2954 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:31,859 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2022-02-15 13:07:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:07:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:31,861 INFO L225 Difference]: With dead ends: 1383 [2022-02-15 13:07:31,861 INFO L226 Difference]: Without dead ends: 1379 [2022-02-15 13:07:31,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:07:31,862 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 174 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:31,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 116 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-02-15 13:07:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2022-02-15 13:07:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.966492146596859) internal successors, (2833), 955 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2022-02-15 13:07:31,875 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2022-02-15 13:07:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:31,875 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2022-02-15 13:07:31,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2022-02-15 13:07:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:31,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:31,876 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:31,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:32,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-15 13:07:32,077 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -668557745, now seen corresponding path program 122 times [2022-02-15 13:07:32,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:32,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954856624] [2022-02-15 13:07:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:32,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:32,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:32,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954856624] [2022-02-15 13:07:32,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954856624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:32,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292051328] [2022-02-15 13:07:32,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:32,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:32,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:32,111 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:32,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-15 13:07:32,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:32,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:32,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:32,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292051328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:32,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:32,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-02-15 13:07:32,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257536044] [2022-02-15 13:07:32,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:32,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:32,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:32,240 INFO L87 Difference]: Start difference. First operand 956 states and 2833 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:32,650 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2022-02-15 13:07:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:07:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:32,652 INFO L225 Difference]: With dead ends: 1412 [2022-02-15 13:07:32,652 INFO L226 Difference]: Without dead ends: 1404 [2022-02-15 13:07:32,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:07:32,653 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 159 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:32,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 138 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-15 13:07:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2022-02-15 13:07:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9980449657869013) internal successors, (3067), 1023 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2022-02-15 13:07:32,666 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2022-02-15 13:07:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:32,666 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2022-02-15 13:07:32,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2022-02-15 13:07:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:32,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:32,668 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:32,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-02-15 13:07:32,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-15 13:07:32,871 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:32,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1710133813, now seen corresponding path program 123 times [2022-02-15 13:07:32,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:32,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893837111] [2022-02-15 13:07:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:32,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:32,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:32,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893837111] [2022-02-15 13:07:32,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893837111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:32,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841636201] [2022-02-15 13:07:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:32,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:32,909 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:32,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-15 13:07:32,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:32,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:33,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841636201] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:33,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:33,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-15 13:07:33,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989950794] [2022-02-15 13:07:33,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:33,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:07:33,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:33,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:07:33,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:33,052 INFO L87 Difference]: Start difference. First operand 1024 states and 3067 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:33,415 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2022-02-15 13:07:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:07:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:33,417 INFO L225 Difference]: With dead ends: 1501 [2022-02-15 13:07:33,417 INFO L226 Difference]: Without dead ends: 1489 [2022-02-15 13:07:33,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:07:33,418 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 162 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:33,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 118 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-02-15 13:07:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2022-02-15 13:07:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.027902790279028) internal successors, (3364), 1111 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2022-02-15 13:07:33,432 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2022-02-15 13:07:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:33,432 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2022-02-15 13:07:33,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2022-02-15 13:07:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:33,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:33,433 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:33,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:33,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-15 13:07:33,634 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash 360746447, now seen corresponding path program 124 times [2022-02-15 13:07:33,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:33,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555548680] [2022-02-15 13:07:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:33,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:33,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:33,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555548680] [2022-02-15 13:07:33,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555548680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:33,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937517086] [2022-02-15 13:07:33,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:33,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:33,676 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:33,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-15 13:07:33,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:33,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:33,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:33,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937517086] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:33,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:33,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-15 13:07:33,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329843035] [2022-02-15 13:07:33,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:33,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:07:33,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:07:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:07:33,815 INFO L87 Difference]: Start difference. First operand 1112 states and 3364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:34,149 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2022-02-15 13:07:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:07:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:34,151 INFO L225 Difference]: With dead ends: 1470 [2022-02-15 13:07:34,151 INFO L226 Difference]: Without dead ends: 1454 [2022-02-15 13:07:34,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:07:34,152 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 121 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:34,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 134 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-02-15 13:07:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2022-02-15 13:07:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.028045574057844) internal successors, (3455), 1141 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2022-02-15 13:07:34,171 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2022-02-15 13:07:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:34,171 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2022-02-15 13:07:34,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2022-02-15 13:07:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:34,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:34,173 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:34,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-15 13:07:34,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:34,373 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash -331329713, now seen corresponding path program 125 times [2022-02-15 13:07:34,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:34,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006493558] [2022-02-15 13:07:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:34,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:34,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:34,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006493558] [2022-02-15 13:07:34,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006493558] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:34,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607034112] [2022-02-15 13:07:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:34,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:34,414 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:34,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-15 13:07:34,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:34,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:34,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:34,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607034112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:34,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:34,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-02-15 13:07:34,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749579816] [2022-02-15 13:07:34,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:34,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:34,521 INFO L87 Difference]: Start difference. First operand 1142 states and 3455 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:34,622 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2022-02-15 13:07:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:07:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:34,624 INFO L225 Difference]: With dead ends: 1462 [2022-02-15 13:07:34,624 INFO L226 Difference]: Without dead ends: 1462 [2022-02-15 13:07:34,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:34,625 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:34,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 105 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-02-15 13:07:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2022-02-15 13:07:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.0300687285223367) internal successors, (3527), 1164 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2022-02-15 13:07:34,639 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2022-02-15 13:07:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:34,639 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2022-02-15 13:07:34,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2022-02-15 13:07:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:34,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:34,641 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:34,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:34,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-15 13:07:34,841 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2091382653, now seen corresponding path program 126 times [2022-02-15 13:07:34,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:34,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403044706] [2022-02-15 13:07:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:34,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:34,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:34,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403044706] [2022-02-15 13:07:34,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403044706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:34,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348204711] [2022-02-15 13:07:34,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:34,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:34,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:34,882 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:34,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-15 13:07:34,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:34,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:34,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:34,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348204711] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:34,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:34,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:34,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341068900] [2022-02-15 13:07:34,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:34,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:34,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:34,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:34,990 INFO L87 Difference]: Start difference. First operand 1165 states and 3527 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:35,122 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2022-02-15 13:07:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:07:35,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:35,124 INFO L225 Difference]: With dead ends: 1324 [2022-02-15 13:07:35,124 INFO L226 Difference]: Without dead ends: 1324 [2022-02-15 13:07:35,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:07:35,125 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:35,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 81 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-02-15 13:07:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2022-02-15 13:07:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.0299914310197087) internal successors, (3536), 1167 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2022-02-15 13:07:35,139 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2022-02-15 13:07:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:35,139 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2022-02-15 13:07:35,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2022-02-15 13:07:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:35,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:35,140 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:35,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:35,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-02-15 13:07:35,356 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1205584373, now seen corresponding path program 127 times [2022-02-15 13:07:35,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:35,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572450467] [2022-02-15 13:07:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:35,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:35,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:35,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572450467] [2022-02-15 13:07:35,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572450467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:35,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476243693] [2022-02-15 13:07:35,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:35,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:35,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:35,413 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:35,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:35,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-15 13:07:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:35,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476243693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:35,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:35,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:35,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081202114] [2022-02-15 13:07:35,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:35,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:35,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:35,544 INFO L87 Difference]: Start difference. First operand 1168 states and 3536 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:35,741 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2022-02-15 13:07:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:07:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:35,743 INFO L225 Difference]: With dead ends: 1344 [2022-02-15 13:07:35,743 INFO L226 Difference]: Without dead ends: 1344 [2022-02-15 13:07:35,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:07:35,743 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:35,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 96 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-02-15 13:07:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2022-02-15 13:07:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.029838022165388) internal successors, (3554), 1173 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2022-02-15 13:07:35,758 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2022-02-15 13:07:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:35,758 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2022-02-15 13:07:35,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2022-02-15 13:07:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:35,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:35,760 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:35,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:35,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:35,975 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 901199747, now seen corresponding path program 128 times [2022-02-15 13:07:35,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:35,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402496119] [2022-02-15 13:07:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:35,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:36,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:36,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402496119] [2022-02-15 13:07:36,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402496119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:36,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369806490] [2022-02-15 13:07:36,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:36,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:36,014 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:36,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-15 13:07:36,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:36,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:36,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:36,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369806490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:36,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:36,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:36,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015755479] [2022-02-15 13:07:36,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:36,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:36,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:36,134 INFO L87 Difference]: Start difference. First operand 1174 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:36,417 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2022-02-15 13:07:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:07:36,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:36,420 INFO L225 Difference]: With dead ends: 1444 [2022-02-15 13:07:36,420 INFO L226 Difference]: Without dead ends: 1444 [2022-02-15 13:07:36,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:36,420 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:36,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 143 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-02-15 13:07:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2022-02-15 13:07:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.0334168755221387) internal successors, (3631), 1197 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2022-02-15 13:07:36,434 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2022-02-15 13:07:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2022-02-15 13:07:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2022-02-15 13:07:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:36,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:36,436 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:36,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-02-15 13:07:36,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:36,636 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1247596789, now seen corresponding path program 129 times [2022-02-15 13:07:36,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:36,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728635203] [2022-02-15 13:07:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:36,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:36,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:36,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728635203] [2022-02-15 13:07:36,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728635203] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:36,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965459830] [2022-02-15 13:07:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:36,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:36,676 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:36,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-15 13:07:36,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:07:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:36,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:36,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965459830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:36,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:36,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:36,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866442869] [2022-02-15 13:07:36,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:36,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:36,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:36,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:36,805 INFO L87 Difference]: Start difference. First operand 1198 states and 3631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:37,156 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2022-02-15 13:07:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:07:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:37,159 INFO L225 Difference]: With dead ends: 1560 [2022-02-15 13:07:37,159 INFO L226 Difference]: Without dead ends: 1560 [2022-02-15 13:07:37,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:07:37,159 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 149 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:37,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 153 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-02-15 13:07:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2022-02-15 13:07:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.0389500423370026) internal successors, (3589), 1181 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2022-02-15 13:07:37,174 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2022-02-15 13:07:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:37,174 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2022-02-15 13:07:37,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2022-02-15 13:07:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:37,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:37,176 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:37,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:37,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2022-02-15 13:07:37,387 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash -676141983, now seen corresponding path program 130 times [2022-02-15 13:07:37,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:37,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751575641] [2022-02-15 13:07:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:37,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:37,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:37,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751575641] [2022-02-15 13:07:37,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751575641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:37,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221403538] [2022-02-15 13:07:37,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:37,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:37,427 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:37,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-15 13:07:37,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:37,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:37,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:37,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221403538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:37,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:37,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:37,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776924713] [2022-02-15 13:07:37,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:37,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:37,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:37,541 INFO L87 Difference]: Start difference. First operand 1182 states and 3589 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:37,871 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2022-02-15 13:07:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:07:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:37,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:37,874 INFO L225 Difference]: With dead ends: 1402 [2022-02-15 13:07:37,874 INFO L226 Difference]: Without dead ends: 1396 [2022-02-15 13:07:37,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:07:37,874 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:37,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 132 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-02-15 13:07:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2022-02-15 13:07:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.0246913580246915) internal successors, (3430), 1134 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2022-02-15 13:07:37,896 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2022-02-15 13:07:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:37,897 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2022-02-15 13:07:37,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2022-02-15 13:07:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:37,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:37,898 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:37,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-15 13:07:38,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:38,099 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1687253767, now seen corresponding path program 131 times [2022-02-15 13:07:38,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:38,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702508389] [2022-02-15 13:07:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:38,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:38,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:38,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702508389] [2022-02-15 13:07:38,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702508389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:38,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776242529] [2022-02-15 13:07:38,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:38,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:38,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:38,138 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:38,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-15 13:07:38,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:38,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:38,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:38,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776242529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:38,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:38,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:38,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473967378] [2022-02-15 13:07:38,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:38,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:38,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:38,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:38,256 INFO L87 Difference]: Start difference. First operand 1135 states and 3430 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:38,526 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2022-02-15 13:07:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:07:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:38,529 INFO L225 Difference]: With dead ends: 1746 [2022-02-15 13:07:38,529 INFO L226 Difference]: Without dead ends: 1737 [2022-02-15 13:07:38,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:07:38,529 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 179 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:38,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 132 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-02-15 13:07:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2022-02-15 13:07:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.0662604722010665) internal successors, (4026), 1313 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2022-02-15 13:07:38,547 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2022-02-15 13:07:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:38,547 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2022-02-15 13:07:38,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2022-02-15 13:07:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:38,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:38,549 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:38,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-15 13:07:38,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-15 13:07:38,764 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1222662663, now seen corresponding path program 132 times [2022-02-15 13:07:38,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:38,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454784107] [2022-02-15 13:07:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:38,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:38,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:38,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454784107] [2022-02-15 13:07:38,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454784107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:38,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641233532] [2022-02-15 13:07:38,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:38,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:38,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:38,806 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:38,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-15 13:07:38,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:07:38,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:38,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:38,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:38,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641233532] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:38,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:38,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:38,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856629294] [2022-02-15 13:07:38,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:38,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:38,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:38,922 INFO L87 Difference]: Start difference. First operand 1314 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:39,243 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2022-02-15 13:07:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:07:39,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:39,246 INFO L225 Difference]: With dead ends: 1701 [2022-02-15 13:07:39,246 INFO L226 Difference]: Without dead ends: 1697 [2022-02-15 13:07:39,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:07:39,246 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:39,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 117 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-02-15 13:07:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2022-02-15 13:07:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.031325301204819) internal successors, (3774), 1245 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2022-02-15 13:07:39,263 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2022-02-15 13:07:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:39,263 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2022-02-15 13:07:39,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2022-02-15 13:07:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:39,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:39,264 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:39,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-15 13:07:39,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:39,465 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1189063435, now seen corresponding path program 133 times [2022-02-15 13:07:39,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:39,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223407755] [2022-02-15 13:07:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:39,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:39,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:39,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223407755] [2022-02-15 13:07:39,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223407755] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:39,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7260579] [2022-02-15 13:07:39,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:39,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:39,504 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:39,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-15 13:07:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:39,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:39,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7260579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:39,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:39,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:39,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241074177] [2022-02-15 13:07:39,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:39,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:39,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:39,617 INFO L87 Difference]: Start difference. First operand 1246 states and 3774 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:39,904 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2022-02-15 13:07:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:07:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:39,907 INFO L225 Difference]: With dead ends: 1682 [2022-02-15 13:07:39,907 INFO L226 Difference]: Without dead ends: 1674 [2022-02-15 13:07:39,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:07:39,907 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 175 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:39,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 103 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-02-15 13:07:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2022-02-15 13:07:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.0338983050847457) internal successors, (3938), 1298 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2022-02-15 13:07:39,923 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2022-02-15 13:07:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:39,923 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2022-02-15 13:07:39,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2022-02-15 13:07:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:39,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:39,925 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:39,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-02-15 13:07:40,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-15 13:07:40,125 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 147487367, now seen corresponding path program 134 times [2022-02-15 13:07:40,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:40,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264090470] [2022-02-15 13:07:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:40,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:40,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:40,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264090470] [2022-02-15 13:07:40,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264090470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:40,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914887795] [2022-02-15 13:07:40,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:40,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:40,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:40,168 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:40,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-15 13:07:40,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:40,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:40,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:40,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914887795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:40,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:40,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:40,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826147158] [2022-02-15 13:07:40,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:40,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:40,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:40,283 INFO L87 Difference]: Start difference. First operand 1299 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:40,532 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2022-02-15 13:07:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:07:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:40,535 INFO L225 Difference]: With dead ends: 1724 [2022-02-15 13:07:40,535 INFO L226 Difference]: Without dead ends: 1712 [2022-02-15 13:07:40,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:07:40,535 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 197 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:40,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 78 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-02-15 13:07:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2022-02-15 13:07:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.026575550493546) internal successors, (3986), 1317 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2022-02-15 13:07:40,552 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2022-02-15 13:07:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:40,552 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2022-02-15 13:07:40,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:40,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2022-02-15 13:07:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:40,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:40,554 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:40,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-15 13:07:40,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-15 13:07:40,754 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:40,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:40,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2076599669, now seen corresponding path program 135 times [2022-02-15 13:07:40,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:40,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244839895] [2022-02-15 13:07:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:40,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:40,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:40,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244839895] [2022-02-15 13:07:40,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244839895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:40,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334981495] [2022-02-15 13:07:40,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:40,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:40,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:40,794 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:40,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-15 13:07:40,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:40,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:40,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:40,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334981495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:40,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:40,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-02-15 13:07:40,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626802129] [2022-02-15 13:07:40,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:40,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:40,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:40,909 INFO L87 Difference]: Start difference. First operand 1318 states and 3986 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:41,098 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2022-02-15 13:07:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:07:41,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:41,100 INFO L225 Difference]: With dead ends: 1567 [2022-02-15 13:07:41,101 INFO L226 Difference]: Without dead ends: 1559 [2022-02-15 13:07:41,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:07:41,101 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 179 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:41,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 75 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-02-15 13:07:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2022-02-15 13:07:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.023538344722855) internal successors, (3982), 1317 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2022-02-15 13:07:41,117 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2022-02-15 13:07:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:41,117 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2022-02-15 13:07:41,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2022-02-15 13:07:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:41,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:41,119 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:41,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:41,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-15 13:07:41,327 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash 703275655, now seen corresponding path program 136 times [2022-02-15 13:07:41,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:41,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823286305] [2022-02-15 13:07:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:41,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:41,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823286305] [2022-02-15 13:07:41,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823286305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:41,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203468912] [2022-02-15 13:07:41,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:41,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:41,367 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:41,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-15 13:07:41,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:41,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203468912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:41,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:41,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-02-15 13:07:41,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597162494] [2022-02-15 13:07:41,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:41,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:41,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:41,479 INFO L87 Difference]: Start difference. First operand 1318 states and 3982 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:41,564 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2022-02-15 13:07:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:07:41,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:41,567 INFO L225 Difference]: With dead ends: 1464 [2022-02-15 13:07:41,567 INFO L226 Difference]: Without dead ends: 1454 [2022-02-15 13:07:41,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:07:41,567 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:41,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:07:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-02-15 13:07:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2022-02-15 13:07:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.0227790432801824) internal successors, (3981), 1317 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2022-02-15 13:07:41,588 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2022-02-15 13:07:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:41,588 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2022-02-15 13:07:41,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2022-02-15 13:07:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:41,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:41,590 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:41,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-15 13:07:41,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-02-15 13:07:41,799 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash -818448945, now seen corresponding path program 137 times [2022-02-15 13:07:41,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:41,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799364830] [2022-02-15 13:07:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:41,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:41,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799364830] [2022-02-15 13:07:41,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799364830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:41,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780782337] [2022-02-15 13:07:41,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:41,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:41,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:41,842 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:41,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-15 13:07:41,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:41,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780782337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:41,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:41,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-15 13:07:41,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125337264] [2022-02-15 13:07:41,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:41,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:41,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:41,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:41,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:41,986 INFO L87 Difference]: Start difference. First operand 1318 states and 3981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:42,261 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2022-02-15 13:07:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:07:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:42,263 INFO L225 Difference]: With dead ends: 1488 [2022-02-15 13:07:42,263 INFO L226 Difference]: Without dead ends: 1488 [2022-02-15 13:07:42,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:07:42,264 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:42,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 88 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-02-15 13:07:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2022-02-15 13:07:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.0227445034116753) internal successors, (3987), 1319 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2022-02-15 13:07:42,279 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2022-02-15 13:07:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:42,279 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2022-02-15 13:07:42,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2022-02-15 13:07:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:42,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:42,281 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:42,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:42,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:42,481 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1757292239, now seen corresponding path program 138 times [2022-02-15 13:07:42,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:42,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379782159] [2022-02-15 13:07:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:42,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:42,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:42,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379782159] [2022-02-15 13:07:42,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379782159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:42,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431739156] [2022-02-15 13:07:42,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:42,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:42,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:42,517 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:42,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-15 13:07:42,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:07:42,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:42,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:42,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:42,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431739156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:42,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:42,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-02-15 13:07:42,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564895589] [2022-02-15 13:07:42,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:42,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:42,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:42,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:42,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:42,632 INFO L87 Difference]: Start difference. First operand 1320 states and 3987 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:42,861 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2022-02-15 13:07:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:07:42,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:42,863 INFO L225 Difference]: With dead ends: 1578 [2022-02-15 13:07:42,863 INFO L226 Difference]: Without dead ends: 1572 [2022-02-15 13:07:42,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:07:42,863 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:42,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 85 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-02-15 13:07:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2022-02-15 13:07:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.02023988005997) internal successors, (4029), 1334 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2022-02-15 13:07:42,879 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2022-02-15 13:07:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:42,879 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2022-02-15 13:07:42,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2022-02-15 13:07:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:42,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:42,881 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:42,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-15 13:07:43,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:43,085 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 454907343, now seen corresponding path program 139 times [2022-02-15 13:07:43,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:43,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810130142] [2022-02-15 13:07:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:43,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:43,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810130142] [2022-02-15 13:07:43,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810130142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:43,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105757072] [2022-02-15 13:07:43,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:43,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:43,131 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:43,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-15 13:07:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105757072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:43,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:43,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-02-15 13:07:43,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875228444] [2022-02-15 13:07:43,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:43,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:43,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:43,243 INFO L87 Difference]: Start difference. First operand 1335 states and 4029 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:43,487 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2022-02-15 13:07:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:07:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:43,489 INFO L225 Difference]: With dead ends: 1610 [2022-02-15 13:07:43,489 INFO L226 Difference]: Without dead ends: 1606 [2022-02-15 13:07:43,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:07:43,490 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:43,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 116 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-02-15 13:07:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2022-02-15 13:07:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.018896447467876) internal successors, (3994), 1323 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2022-02-15 13:07:43,506 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2022-02-15 13:07:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:43,506 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2022-02-15 13:07:43,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2022-02-15 13:07:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:43,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:43,508 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:43,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:43,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:43,708 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash 412894927, now seen corresponding path program 140 times [2022-02-15 13:07:43,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:43,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427639455] [2022-02-15 13:07:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:43,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:43,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427639455] [2022-02-15 13:07:43,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427639455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:43,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527417748] [2022-02-15 13:07:43,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:43,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:43,745 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:43,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-15 13:07:43,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:43,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:43,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527417748] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:43,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:43,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-02-15 13:07:43,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135729153] [2022-02-15 13:07:43,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:43,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:43,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:43,863 INFO L87 Difference]: Start difference. First operand 1324 states and 3994 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:44,173 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2022-02-15 13:07:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:07:44,173 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:44,175 INFO L225 Difference]: With dead ends: 1777 [2022-02-15 13:07:44,175 INFO L226 Difference]: Without dead ends: 1777 [2022-02-15 13:07:44,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:07:44,176 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:44,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 145 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2022-02-15 13:07:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2022-02-15 13:07:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.0270067516879218) internal successors, (4035), 1333 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2022-02-15 13:07:44,193 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2022-02-15 13:07:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:44,193 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2022-02-15 13:07:44,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2022-02-15 13:07:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:44,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:44,195 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:44,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:44,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:44,395 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash 984349733, now seen corresponding path program 141 times [2022-02-15 13:07:44,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:44,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464986991] [2022-02-15 13:07:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:44,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:44,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:44,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464986991] [2022-02-15 13:07:44,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464986991] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:44,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522143678] [2022-02-15 13:07:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:44,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:44,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:44,433 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:44,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-15 13:07:44,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:07:44,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:44,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:44,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:44,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522143678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:44,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:44,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-02-15 13:07:44,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596160336] [2022-02-15 13:07:44,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:44,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:44,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:44,549 INFO L87 Difference]: Start difference. First operand 1334 states and 4035 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:44,905 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2022-02-15 13:07:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:07:44,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:44,908 INFO L225 Difference]: With dead ends: 1692 [2022-02-15 13:07:44,908 INFO L226 Difference]: Without dead ends: 1683 [2022-02-15 13:07:44,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:07:44,908 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:44,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 139 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-02-15 13:07:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2022-02-15 13:07:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.0101641907740424) internal successors, (3850), 1279 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2022-02-15 13:07:44,925 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2022-02-15 13:07:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:44,925 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2022-02-15 13:07:44,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2022-02-15 13:07:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:44,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:44,926 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:44,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:45,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-02-15 13:07:45,142 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1519579535, now seen corresponding path program 142 times [2022-02-15 13:07:45,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:45,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335367837] [2022-02-15 13:07:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:45,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:45,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335367837] [2022-02-15 13:07:45,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335367837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:45,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591365105] [2022-02-15 13:07:45,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:45,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:45,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:45,181 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:45,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-15 13:07:45,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:45,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:45,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591365105] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:45,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:45,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-02-15 13:07:45,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256985628] [2022-02-15 13:07:45,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:45,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:45,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:45,303 INFO L87 Difference]: Start difference. First operand 1280 states and 3850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:45,627 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2022-02-15 13:07:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:07:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:45,629 INFO L225 Difference]: With dead ends: 1586 [2022-02-15 13:07:45,629 INFO L226 Difference]: Without dead ends: 1574 [2022-02-15 13:07:45,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:07:45,630 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:45,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 110 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-02-15 13:07:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2022-02-15 13:07:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.011627906976744) internal successors, (3885), 1290 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2022-02-15 13:07:45,645 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2022-02-15 13:07:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:45,645 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2022-02-15 13:07:45,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2022-02-15 13:07:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:45,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:45,647 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:45,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-02-15 13:07:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:45,847 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash -12209661, now seen corresponding path program 143 times [2022-02-15 13:07:45,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:45,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130700701] [2022-02-15 13:07:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:45,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:45,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130700701] [2022-02-15 13:07:45,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130700701] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:45,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343022967] [2022-02-15 13:07:45,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:45,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:45,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:45,895 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:45,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-15 13:07:45,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:45,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:46,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343022967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:46,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:46,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-15 13:07:46,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748899245] [2022-02-15 13:07:46,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:46,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:07:46,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:46,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:07:46,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:46,023 INFO L87 Difference]: Start difference. First operand 1291 states and 3885 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:46,315 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2022-02-15 13:07:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:07:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:46,317 INFO L225 Difference]: With dead ends: 1481 [2022-02-15 13:07:46,317 INFO L226 Difference]: Without dead ends: 1481 [2022-02-15 13:07:46,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 13:07:46,318 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:46,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 96 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-02-15 13:07:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2022-02-15 13:07:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.0101483216237312) internal successors, (3856), 1281 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2022-02-15 13:07:46,340 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2022-02-15 13:07:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:46,340 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2022-02-15 13:07:46,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2022-02-15 13:07:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:46,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:46,342 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:46,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-15 13:07:46,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-15 13:07:46,542 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash -882813301, now seen corresponding path program 144 times [2022-02-15 13:07:46,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:46,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144427590] [2022-02-15 13:07:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:46,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:46,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:46,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144427590] [2022-02-15 13:07:46,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144427590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:46,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895095407] [2022-02-15 13:07:46,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:46,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:46,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:46,579 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:46,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-15 13:07:46,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:46,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:46,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:46,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:46,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895095407] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:46,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:46,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-02-15 13:07:46,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264821853] [2022-02-15 13:07:46,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:46,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:46,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:46,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:46,705 INFO L87 Difference]: Start difference. First operand 1282 states and 3856 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:46,991 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2022-02-15 13:07:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:07:46,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:46,994 INFO L225 Difference]: With dead ends: 1620 [2022-02-15 13:07:46,994 INFO L226 Difference]: Without dead ends: 1614 [2022-02-15 13:07:46,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:07:46,994 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:46,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 132 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2022-02-15 13:07:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2022-02-15 13:07:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.013803680981595) internal successors, (3930), 1304 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2022-02-15 13:07:47,011 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2022-02-15 13:07:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:47,011 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2022-02-15 13:07:47,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2022-02-15 13:07:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:47,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:47,012 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:47,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-15 13:07:47,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-15 13:07:47,213 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash -495255293, now seen corresponding path program 145 times [2022-02-15 13:07:47,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:47,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420478762] [2022-02-15 13:07:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:47,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:47,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:47,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420478762] [2022-02-15 13:07:47,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420478762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:47,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72016663] [2022-02-15 13:07:47,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:47,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:47,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:47,248 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:47,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-15 13:07:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:47,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72016663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:47,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:47,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-02-15 13:07:47,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452963294] [2022-02-15 13:07:47,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:47,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:47,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:47,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:47,368 INFO L87 Difference]: Start difference. First operand 1305 states and 3930 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:47,647 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2022-02-15 13:07:47,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:07:47,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:47,656 INFO L225 Difference]: With dead ends: 1830 [2022-02-15 13:07:47,656 INFO L226 Difference]: Without dead ends: 1828 [2022-02-15 13:07:47,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:07:47,656 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 108 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:47,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 168 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-02-15 13:07:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2022-02-15 13:07:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.013392857142857) internal successors, (4050), 1344 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2022-02-15 13:07:47,673 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2022-02-15 13:07:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:47,673 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2022-02-15 13:07:47,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2022-02-15 13:07:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:47,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:47,675 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:47,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-15 13:07:47,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-15 13:07:47,887 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 348530571, now seen corresponding path program 146 times [2022-02-15 13:07:47,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:47,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987094585] [2022-02-15 13:07:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:47,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:47,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:47,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987094585] [2022-02-15 13:07:47,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987094585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:47,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316761474] [2022-02-15 13:07:47,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:47,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:47,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:47,921 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:47,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-15 13:07:47,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:47,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:47,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:48,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:48,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316761474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:48,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:48,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-02-15 13:07:48,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620562814] [2022-02-15 13:07:48,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:48,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:48,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:48,063 INFO L87 Difference]: Start difference. First operand 1345 states and 4050 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:48,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:48,332 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2022-02-15 13:07:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:07:48,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:48,335 INFO L225 Difference]: With dead ends: 1888 [2022-02-15 13:07:48,335 INFO L226 Difference]: Without dead ends: 1888 [2022-02-15 13:07:48,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:48,335 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 179 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:48,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 114 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-02-15 13:07:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2022-02-15 13:07:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.0257510729613735) internal successors, (4230), 1398 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2022-02-15 13:07:48,352 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2022-02-15 13:07:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:48,352 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2022-02-15 13:07:48,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2022-02-15 13:07:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:48,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:48,354 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:48,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-02-15 13:07:48,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-02-15 13:07:48,555 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 919985377, now seen corresponding path program 147 times [2022-02-15 13:07:48,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:48,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529876618] [2022-02-15 13:07:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:48,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:48,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:48,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529876618] [2022-02-15 13:07:48,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529876618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:48,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564425705] [2022-02-15 13:07:48,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:48,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:48,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:48,587 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:48,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-15 13:07:48,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:07:48,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:48,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:48,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:48,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564425705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:48,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:48,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-02-15 13:07:48,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302459371] [2022-02-15 13:07:48,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:48,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:48,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:48,710 INFO L87 Difference]: Start difference. First operand 1399 states and 4230 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:49,106 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2022-02-15 13:07:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:07:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:49,109 INFO L225 Difference]: With dead ends: 1840 [2022-02-15 13:07:49,109 INFO L226 Difference]: Without dead ends: 1831 [2022-02-15 13:07:49,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:07:49,110 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:49,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 143 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-02-15 13:07:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2022-02-15 13:07:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.015362106803219) internal successors, (4122), 1367 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2022-02-15 13:07:49,127 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2022-02-15 13:07:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:49,127 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2022-02-15 13:07:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2022-02-15 13:07:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:49,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:49,128 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:49,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-02-15 13:07:49,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:49,329 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1455215179, now seen corresponding path program 148 times [2022-02-15 13:07:49,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:49,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213678049] [2022-02-15 13:07:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:49,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:49,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:49,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213678049] [2022-02-15 13:07:49,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213678049] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:49,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063087008] [2022-02-15 13:07:49,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:49,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:49,365 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:49,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-15 13:07:49,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:49,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:49,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:49,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063087008] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:49,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:49,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-02-15 13:07:49,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932648959] [2022-02-15 13:07:49,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:49,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:49,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:49,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:49,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:49,487 INFO L87 Difference]: Start difference. First operand 1368 states and 4122 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:49,862 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2022-02-15 13:07:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:07:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:49,865 INFO L225 Difference]: With dead ends: 1834 [2022-02-15 13:07:49,865 INFO L226 Difference]: Without dead ends: 1822 [2022-02-15 13:07:49,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:07:49,866 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:49,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 138 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-02-15 13:07:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2022-02-15 13:07:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.015578635014837) internal successors, (4065), 1348 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2022-02-15 13:07:49,892 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2022-02-15 13:07:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:49,892 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2022-02-15 13:07:49,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2022-02-15 13:07:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:49,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:49,893 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:49,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:50,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-02-15 13:07:50,094 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:50,094 INFO L85 PathProgramCache]: Analyzing trace with hash 867469857, now seen corresponding path program 149 times [2022-02-15 13:07:50,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:50,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852686187] [2022-02-15 13:07:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:50,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:50,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852686187] [2022-02-15 13:07:50,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852686187] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:50,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286322500] [2022-02-15 13:07:50,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:50,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:50,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:50,134 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:50,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-15 13:07:50,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:50,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:50,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286322500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:50,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:50,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-02-15 13:07:50,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480377264] [2022-02-15 13:07:50,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:50,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:07:50,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:50,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:07:50,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:50,266 INFO L87 Difference]: Start difference. First operand 1349 states and 4065 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:50,592 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2022-02-15 13:07:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:07:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:50,594 INFO L225 Difference]: With dead ends: 1747 [2022-02-15 13:07:50,595 INFO L226 Difference]: Without dead ends: 1729 [2022-02-15 13:07:50,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:07:50,595 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:50,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 102 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-02-15 13:07:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2022-02-15 13:07:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.0198237885462555) internal successors, (4113), 1362 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2022-02-15 13:07:50,613 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2022-02-15 13:07:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:50,613 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2022-02-15 13:07:50,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2022-02-15 13:07:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:50,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:50,614 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:50,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:50,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:50,815 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash -788595633, now seen corresponding path program 150 times [2022-02-15 13:07:50,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:50,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293815420] [2022-02-15 13:07:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:50,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:50,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293815420] [2022-02-15 13:07:50,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293815420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:50,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607221373] [2022-02-15 13:07:50,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:50,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:50,857 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:50,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-15 13:07:50,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:50,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607221373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:50,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:50,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-15 13:07:50,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49587423] [2022-02-15 13:07:50,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:50,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:07:50,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:07:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:07:50,996 INFO L87 Difference]: Start difference. First operand 1363 states and 4113 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:51,321 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2022-02-15 13:07:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:07:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:51,324 INFO L225 Difference]: With dead ends: 1698 [2022-02-15 13:07:51,324 INFO L226 Difference]: Without dead ends: 1698 [2022-02-15 13:07:51,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:07:51,325 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:51,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 120 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-02-15 13:07:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2022-02-15 13:07:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.013581129378127) internal successors, (4216), 1399 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2022-02-15 13:07:51,340 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2022-02-15 13:07:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:51,341 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2022-02-15 13:07:51,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2022-02-15 13:07:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:51,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:51,342 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:51,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:51,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:51,543 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1121706417, now seen corresponding path program 151 times [2022-02-15 13:07:51,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:51,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898892987] [2022-02-15 13:07:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:51,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:51,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:51,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898892987] [2022-02-15 13:07:51,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898892987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:51,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611958681] [2022-02-15 13:07:51,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:51,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:51,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:51,580 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:51,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-15 13:07:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:51,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:51,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611958681] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:51,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:51,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-15 13:07:51,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800363431] [2022-02-15 13:07:51,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:51,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:07:51,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:07:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:51,712 INFO L87 Difference]: Start difference. First operand 1400 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:52,024 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2022-02-15 13:07:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:07:52,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:52,027 INFO L225 Difference]: With dead ends: 1946 [2022-02-15 13:07:52,027 INFO L226 Difference]: Without dead ends: 1946 [2022-02-15 13:07:52,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:07:52,028 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:52,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 200 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-02-15 13:07:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2022-02-15 13:07:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.0202020202020203) internal successors, (4485), 1485 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2022-02-15 13:07:52,047 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2022-02-15 13:07:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:52,047 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2022-02-15 13:07:52,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2022-02-15 13:07:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:52,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:52,049 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:52,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-02-15 13:07:52,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:52,250 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 114474063, now seen corresponding path program 152 times [2022-02-15 13:07:52,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:52,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821532394] [2022-02-15 13:07:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:52,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:52,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:52,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821532394] [2022-02-15 13:07:52,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821532394] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:52,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857213175] [2022-02-15 13:07:52,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:52,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:52,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:52,282 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:52,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-15 13:07:52,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:52,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:52,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:52,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:52,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:52,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857213175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:52,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:52,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-02-15 13:07:52,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574505970] [2022-02-15 13:07:52,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:52,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:52,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:52,419 INFO L87 Difference]: Start difference. First operand 1486 states and 4485 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:52,724 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2022-02-15 13:07:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:07:52,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:52,728 INFO L225 Difference]: With dead ends: 2146 [2022-02-15 13:07:52,728 INFO L226 Difference]: Without dead ends: 2146 [2022-02-15 13:07:52,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:52,728 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 114 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:52,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 242 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-02-15 13:07:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2022-02-15 13:07:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.034956304619226) internal successors, (4862), 1602 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2022-02-15 13:07:52,751 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2022-02-15 13:07:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:52,751 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2022-02-15 13:07:52,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2022-02-15 13:07:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:52,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:52,753 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:52,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-15 13:07:52,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:52,953 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1646764465, now seen corresponding path program 153 times [2022-02-15 13:07:52,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:52,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866504239] [2022-02-15 13:07:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:52,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:52,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:52,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866504239] [2022-02-15 13:07:52,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866504239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:52,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883623958] [2022-02-15 13:07:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:52,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:52,983 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:52,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-15 13:07:53,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:07:53,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:53,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:53,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883623958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:53,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:53,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-02-15 13:07:53,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078068325] [2022-02-15 13:07:53,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:53,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:53,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:53,107 INFO L87 Difference]: Start difference. First operand 1603 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:53,397 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2022-02-15 13:07:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:07:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:53,400 INFO L225 Difference]: With dead ends: 2514 [2022-02-15 13:07:53,400 INFO L226 Difference]: Without dead ends: 2514 [2022-02-15 13:07:53,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:53,401 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:53,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 176 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-02-15 13:07:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2022-02-15 13:07:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.0701570680628274) internal successors, (5864), 1910 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2022-02-15 13:07:53,433 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2022-02-15 13:07:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:53,433 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2022-02-15 13:07:53,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2022-02-15 13:07:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:53,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:53,435 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:53,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-02-15 13:07:53,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-15 13:07:53,635 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1075309659, now seen corresponding path program 154 times [2022-02-15 13:07:53,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:53,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375041679] [2022-02-15 13:07:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:53,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:53,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:53,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375041679] [2022-02-15 13:07:53,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375041679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:53,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985473579] [2022-02-15 13:07:53,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:53,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:53,668 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:53,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-15 13:07:53,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:53,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:53,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:53,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:53,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:53,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985473579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:53,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:53,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-02-15 13:07:53,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686130092] [2022-02-15 13:07:53,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:53,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:53,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:53,790 INFO L87 Difference]: Start difference. First operand 1911 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:54,235 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2022-02-15 13:07:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:07:54,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:54,239 INFO L225 Difference]: With dead ends: 2413 [2022-02-15 13:07:54,239 INFO L226 Difference]: Without dead ends: 2407 [2022-02-15 13:07:54,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:07:54,240 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:54,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 133 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-02-15 13:07:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2022-02-15 13:07:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.062466913710958) internal successors, (5785), 1889 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2022-02-15 13:07:54,264 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2022-02-15 13:07:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:54,264 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2022-02-15 13:07:54,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2022-02-15 13:07:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:54,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:54,267 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:54,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:54,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-15 13:07:54,467 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:54,468 INFO L85 PathProgramCache]: Analyzing trace with hash -540079857, now seen corresponding path program 155 times [2022-02-15 13:07:54,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:54,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652916802] [2022-02-15 13:07:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:54,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:54,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:54,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652916802] [2022-02-15 13:07:54,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652916802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:54,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24969141] [2022-02-15 13:07:54,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:54,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:54,506 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:54,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-15 13:07:54,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:54,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:54,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:54,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:54,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:54,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24969141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:54,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:54,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-02-15 13:07:54,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119929648] [2022-02-15 13:07:54,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:54,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:54,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:54,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:54,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:54,630 INFO L87 Difference]: Start difference. First operand 1890 states and 5785 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:55,049 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2022-02-15 13:07:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:07:55,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:55,053 INFO L225 Difference]: With dead ends: 2435 [2022-02-15 13:07:55,053 INFO L226 Difference]: Without dead ends: 2423 [2022-02-15 13:07:55,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:07:55,054 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:55,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 132 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2022-02-15 13:07:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2022-02-15 13:07:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.068642745709828) internal successors, (5901), 1923 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2022-02-15 13:07:55,082 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2022-02-15 13:07:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:55,082 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2022-02-15 13:07:55,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2022-02-15 13:07:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:55,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:55,085 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:55,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-15 13:07:55,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-15 13:07:55,285 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1127825179, now seen corresponding path program 156 times [2022-02-15 13:07:55,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:55,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324512053] [2022-02-15 13:07:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:55,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:55,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:55,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324512053] [2022-02-15 13:07:55,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324512053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:55,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883910840] [2022-02-15 13:07:55,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:55,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:55,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:55,324 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:55,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-15 13:07:55,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:07:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:55,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:55,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:55,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883910840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:55,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:55,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-02-15 13:07:55,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839604856] [2022-02-15 13:07:55,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:55,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:07:55,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:07:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:55,455 INFO L87 Difference]: Start difference. First operand 1924 states and 5901 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:55,848 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2022-02-15 13:07:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:07:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:55,852 INFO L225 Difference]: With dead ends: 2515 [2022-02-15 13:07:55,852 INFO L226 Difference]: Without dead ends: 2497 [2022-02-15 13:07:55,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:07:55,852 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:55,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 145 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-02-15 13:07:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2022-02-15 13:07:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.0759557344064388) internal successors, (6115), 1988 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2022-02-15 13:07:55,879 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2022-02-15 13:07:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:55,879 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2022-02-15 13:07:55,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2022-02-15 13:07:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:07:55,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:55,882 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:55,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-02-15 13:07:56,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:56,082 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2126906319, now seen corresponding path program 157 times [2022-02-15 13:07:56,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:56,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489463738] [2022-02-15 13:07:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:56,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:56,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:56,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489463738] [2022-02-15 13:07:56,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489463738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:56,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503820942] [2022-02-15 13:07:56,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:56,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:56,124 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:56,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-15 13:07:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:56,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:56,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503820942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:56,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:56,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-15 13:07:56,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253144076] [2022-02-15 13:07:56,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:56,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:07:56,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:07:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:07:56,274 INFO L87 Difference]: Start difference. First operand 1989 states and 6115 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:56,641 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2022-02-15 13:07:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:07:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 13:07:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:56,644 INFO L225 Difference]: With dead ends: 2460 [2022-02-15 13:07:56,645 INFO L226 Difference]: Without dead ends: 2436 [2022-02-15 13:07:56,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:07:56,645 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:56,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 125 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2022-02-15 13:07:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2022-02-15 13:07:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.073689416419387) internal successors, (6215), 2022 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2022-02-15 13:07:56,680 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2022-02-15 13:07:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:56,680 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2022-02-15 13:07:56,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2022-02-15 13:07:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:56,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:56,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:56,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:56,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:56,883 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1653562103, now seen corresponding path program 158 times [2022-02-15 13:07:56,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:56,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200518561] [2022-02-15 13:07:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:56,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:57,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:57,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200518561] [2022-02-15 13:07:57,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200518561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:57,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730024534] [2022-02-15 13:07:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:57,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:57,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:57,025 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:57,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-15 13:07:57,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:57,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:07:57,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:57,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:57,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730024534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:57,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:57,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-02-15 13:07:57,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961887277] [2022-02-15 13:07:57,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:57,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:07:57,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:07:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:07:57,481 INFO L87 Difference]: Start difference. First operand 2023 states and 6215 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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) [2022-02-15 13:07:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:57,896 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2022-02-15 13:07:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:07:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:57,900 INFO L225 Difference]: With dead ends: 2290 [2022-02-15 13:07:57,900 INFO L226 Difference]: Without dead ends: 2264 [2022-02-15 13:07:57,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:07:57,900 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 138 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:57,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 518 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2022-02-15 13:07:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2022-02-15 13:07:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.054211035818006) internal successors, (6310), 2066 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2022-02-15 13:07:57,927 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2022-02-15 13:07:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:57,927 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2022-02-15 13:07:57,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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) [2022-02-15 13:07:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2022-02-15 13:07:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:57,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:57,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:57,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:58,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:58,131 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash 344494571, now seen corresponding path program 159 times [2022-02-15 13:07:58,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:58,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556619632] [2022-02-15 13:07:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:58,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:58,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:58,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556619632] [2022-02-15 13:07:58,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556619632] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:58,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377729115] [2022-02-15 13:07:58,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:58,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:58,242 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:58,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-15 13:07:58,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:07:58,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:07:58,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:58,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:58,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377729115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:58,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:58,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-15 13:07:58,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966744554] [2022-02-15 13:07:58,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:58,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:07:58,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:07:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:07:58,704 INFO L87 Difference]: Start difference. First operand 2067 states and 6310 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:59,027 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2022-02-15 13:07:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:07:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:59,031 INFO L225 Difference]: With dead ends: 2347 [2022-02-15 13:07:59,031 INFO L226 Difference]: Without dead ends: 2340 [2022-02-15 13:07:59,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:07:59,031 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 178 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:59,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 561 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2022-02-15 13:07:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2022-02-15 13:07:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.06465313827277) internal successors, (6494), 2119 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2022-02-15 13:07:59,058 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2022-02-15 13:07:59,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:59,058 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2022-02-15 13:07:59,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2022-02-15 13:07:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:59,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:59,061 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:59,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:59,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-02-15 13:07:59,261 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:07:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1959197295, now seen corresponding path program 160 times [2022-02-15 13:07:59,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:59,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658368714] [2022-02-15 13:07:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:59,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:59,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:59,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658368714] [2022-02-15 13:07:59,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658368714] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:59,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705439696] [2022-02-15 13:07:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:59,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:59,391 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:59,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-15 13:07:59,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:59,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:07:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:59,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:59,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705439696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:59,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:59,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-15 13:07:59,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951280139] [2022-02-15 13:07:59,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:59,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:07:59,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:59,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:07:59,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:07:59,864 INFO L87 Difference]: Start difference. First operand 2120 states and 6494 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-02-15 13:08:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:00,229 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2022-02-15 13:08:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 21 [2022-02-15 13:08:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:00,232 INFO L225 Difference]: With dead ends: 2333 [2022-02-15 13:08:00,232 INFO L226 Difference]: Without dead ends: 2317 [2022-02-15 13:08:00,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:08:00,235 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 195 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:00,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 528 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-02-15 13:08:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2022-02-15 13:08:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-02-15 13:08:00,261 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-02-15 13:08:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:00,261 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-02-15 13:08:00,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-02-15 13:08:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-02-15 13:08:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:00,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:00,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:00,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:00,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:00,464 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash 915949377, now seen corresponding path program 161 times [2022-02-15 13:08:00,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:00,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325697427] [2022-02-15 13:08:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:00,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:00,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:00,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325697427] [2022-02-15 13:08:00,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325697427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:00,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895158441] [2022-02-15 13:08:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:00,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:00,574 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:00,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-15 13:08:00,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:08:00,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:00,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:00,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:01,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895158441] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:01,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:01,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-02-15 13:08:01,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122877288] [2022-02-15 13:08:01,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:01,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:01,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:01,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:01,026 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2022-02-15 13:08:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:01,351 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2022-02-15 13:08:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:01,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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 21 [2022-02-15 13:08:01,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:01,354 INFO L225 Difference]: With dead ends: 2307 [2022-02-15 13:08:01,354 INFO L226 Difference]: Without dead ends: 2300 [2022-02-15 13:08:01,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:01,355 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:01,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 486 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-02-15 13:08:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2022-02-15 13:08:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-02-15 13:08:01,380 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-02-15 13:08:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:01,380 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-02-15 13:08:01,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2022-02-15 13:08:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-02-15 13:08:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:01,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:01,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:01,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-02-15 13:08:01,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:01,583 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:01,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1451179179, now seen corresponding path program 162 times [2022-02-15 13:08:01,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:01,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276183066] [2022-02-15 13:08:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:01,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:01,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:01,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276183066] [2022-02-15 13:08:01,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276183066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:01,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109107685] [2022-02-15 13:08:01,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:01,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:01,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:01,702 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:01,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-15 13:08:01,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:08:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:01,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:02,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109107685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:02,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:02,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-02-15 13:08:02,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018398765] [2022-02-15 13:08:02,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:02,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:08:02,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:08:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:02,148 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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) [2022-02-15 13:08:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:02,513 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2022-02-15 13:08:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:08:02,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:02,517 INFO L225 Difference]: With dead ends: 2324 [2022-02-15 13:08:02,517 INFO L226 Difference]: Without dead ends: 2317 [2022-02-15 13:08:02,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:02,518 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 164 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:02,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 520 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:02,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-02-15 13:08:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2022-02-15 13:08:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-02-15 13:08:02,545 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-02-15 13:08:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:02,545 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-02-15 13:08:02,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 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) [2022-02-15 13:08:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-02-15 13:08:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:02,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:02,548 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:02,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:02,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:02,763 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 863433857, now seen corresponding path program 163 times [2022-02-15 13:08:02,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:02,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208867164] [2022-02-15 13:08:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:02,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:02,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:02,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208867164] [2022-02-15 13:08:02,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208867164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:02,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53556230] [2022-02-15 13:08:02,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:02,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:02,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:02,895 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-15 13:08:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:03,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:03,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53556230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:03,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:03,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-02-15 13:08:03,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877308838] [2022-02-15 13:08:03,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:03,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:08:03,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:03,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:08:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:08:03,318 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:03,765 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2022-02-15 13:08:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:08:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:03,768 INFO L225 Difference]: With dead ends: 2260 [2022-02-15 13:08:03,768 INFO L226 Difference]: Without dead ends: 2253 [2022-02-15 13:08:03,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:03,768 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 120 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:03,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 584 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-02-15 13:08:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2022-02-15 13:08:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2022-02-15 13:08:03,793 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2022-02-15 13:08:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:03,793 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2022-02-15 13:08:03,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2022-02-15 13:08:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:03,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:03,795 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:03,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:03,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:03,996 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1681421863, now seen corresponding path program 164 times [2022-02-15 13:08:03,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:03,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121819270] [2022-02-15 13:08:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:03,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:04,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:04,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121819270] [2022-02-15 13:08:04,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121819270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:04,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798873946] [2022-02-15 13:08:04,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:04,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:04,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:04,117 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:04,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-15 13:08:04,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:04,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:04,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798873946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:04,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:04,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 26 [2022-02-15 13:08:04,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723134902] [2022-02-15 13:08:04,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:04,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:04,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:04,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:04,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:04,585 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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) [2022-02-15 13:08:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:04,862 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2022-02-15 13:08:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:08:04,862 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 21 [2022-02-15 13:08:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:04,866 INFO L225 Difference]: With dead ends: 2270 [2022-02-15 13:08:04,866 INFO L226 Difference]: Without dead ends: 2263 [2022-02-15 13:08:04,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:04,866 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 144 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:04,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 498 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-02-15 13:08:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2022-02-15 13:08:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.071022727272727) internal successors, (6486), 2112 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2022-02-15 13:08:04,891 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2022-02-15 13:08:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:04,892 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2022-02-15 13:08:04,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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) [2022-02-15 13:08:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2022-02-15 13:08:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:04,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:04,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:04,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-02-15 13:08:05,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-02-15 13:08:05,095 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash -998842709, now seen corresponding path program 165 times [2022-02-15 13:08:05,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:05,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101687479] [2022-02-15 13:08:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:05,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:05,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:05,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101687479] [2022-02-15 13:08:05,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101687479] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:05,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27540931] [2022-02-15 13:08:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:05,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:05,202 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:05,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-15 13:08:05,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:08:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:05,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:05,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:05,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:05,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27540931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:05,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:05,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 26 [2022-02-15 13:08:05,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278920390] [2022-02-15 13:08:05,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:05,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:05,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:05,685 INFO L87 Difference]: Start difference. First operand 2113 states and 6486 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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) [2022-02-15 13:08:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:05,979 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2022-02-15 13:08:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:08:05,979 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 21 [2022-02-15 13:08:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:05,982 INFO L225 Difference]: With dead ends: 2271 [2022-02-15 13:08:05,982 INFO L226 Difference]: Without dead ends: 2262 [2022-02-15 13:08:05,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:05,983 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 97 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:05,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 512 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-02-15 13:08:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2022-02-15 13:08:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2022-02-15 13:08:06,010 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2022-02-15 13:08:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:06,010 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2022-02-15 13:08:06,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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) [2022-02-15 13:08:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2022-02-15 13:08:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:06,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:06,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:06,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-15 13:08:06,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:06,213 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1216830759, now seen corresponding path program 166 times [2022-02-15 13:08:06,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:06,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438720244] [2022-02-15 13:08:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:06,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:06,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:06,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438720244] [2022-02-15 13:08:06,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438720244] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:06,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123769437] [2022-02-15 13:08:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:06,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:06,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:06,337 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:06,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-15 13:08:06,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:06,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:06,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:06,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:06,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123769437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:06,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:06,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-02-15 13:08:06,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576702782] [2022-02-15 13:08:06,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:06,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:06,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:06,829 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2022-02-15 13:08:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:07,115 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2022-02-15 13:08:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:08:07,115 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 21 [2022-02-15 13:08:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:07,118 INFO L225 Difference]: With dead ends: 2235 [2022-02-15 13:08:07,119 INFO L226 Difference]: Without dead ends: 2228 [2022-02-15 13:08:07,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:07,119 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 112 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:07,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 471 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2022-02-15 13:08:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2022-02-15 13:08:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2022-02-15 13:08:07,144 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2022-02-15 13:08:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:07,144 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2022-02-15 13:08:07,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2022-02-15 13:08:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2022-02-15 13:08:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:07,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:07,146 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:07,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:07,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-15 13:08:07,347 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:07,347 INFO L85 PathProgramCache]: Analyzing trace with hash 176494955, now seen corresponding path program 167 times [2022-02-15 13:08:07,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:07,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259681266] [2022-02-15 13:08:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:07,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:07,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:07,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259681266] [2022-02-15 13:08:07,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259681266] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:07,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874576794] [2022-02-15 13:08:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:07,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:07,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:07,488 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:07,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-15 13:08:07,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:08:07,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:07,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874576794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:07,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:07,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 25 [2022-02-15 13:08:07,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884463411] [2022-02-15 13:08:07,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:07,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:08:07,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:08:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:08:07,995 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-02-15 13:08:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:08,354 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2022-02-15 13:08:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 21 [2022-02-15 13:08:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:08,358 INFO L225 Difference]: With dead ends: 2462 [2022-02-15 13:08:08,358 INFO L226 Difference]: Without dead ends: 2445 [2022-02-15 13:08:08,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:08,358 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 158 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:08,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 573 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2022-02-15 13:08:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2022-02-15 13:08:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.083674397453388) internal successors, (6781), 2199 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2022-02-15 13:08:08,393 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2022-02-15 13:08:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:08,393 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2022-02-15 13:08:08,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-02-15 13:08:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2022-02-15 13:08:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:08,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:08,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:08,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-15 13:08:08,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:08,596 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:08,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1791197679, now seen corresponding path program 168 times [2022-02-15 13:08:08,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:08,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271263969] [2022-02-15 13:08:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:08,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:08,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:08,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271263969] [2022-02-15 13:08:08,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271263969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:08,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581619725] [2022-02-15 13:08:08,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:08,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:08,710 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:08,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-15 13:08:08,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:08:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:08,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:09,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581619725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:09,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:09,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 25 [2022-02-15 13:08:09,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719404364] [2022-02-15 13:08:09,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:09,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:08:09,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:08:09,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:08:09,150 INFO L87 Difference]: Start difference. First operand 2200 states and 6781 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-02-15 13:08:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:09,510 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2022-02-15 13:08:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 21 [2022-02-15 13:08:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:09,514 INFO L225 Difference]: With dead ends: 2464 [2022-02-15 13:08:09,514 INFO L226 Difference]: Without dead ends: 2446 [2022-02-15 13:08:09,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:09,515 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 124 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:09,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 657 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-02-15 13:08:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2022-02-15 13:08:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.0744827586206895) internal successors, (6687), 2175 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2022-02-15 13:08:09,550 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2022-02-15 13:08:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:09,550 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2022-02-15 13:08:09,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-02-15 13:08:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2022-02-15 13:08:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:09,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:09,553 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:09,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-02-15 13:08:09,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-02-15 13:08:09,754 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:09,754 INFO L85 PathProgramCache]: Analyzing trace with hash -288096149, now seen corresponding path program 169 times [2022-02-15 13:08:09,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:09,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204706708] [2022-02-15 13:08:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:09,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:09,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:09,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204706708] [2022-02-15 13:08:09,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204706708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:09,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763362791] [2022-02-15 13:08:09,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:09,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:09,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:09,861 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:09,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-15 13:08:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:09,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:09,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:10,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:10,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763362791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:10,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:10,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 24 [2022-02-15 13:08:10,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769419212] [2022-02-15 13:08:10,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:10,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:10,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:10,312 INFO L87 Difference]: Start difference. First operand 2176 states and 6687 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-02-15 13:08:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:10,672 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2022-02-15 13:08:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:08:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 21 [2022-02-15 13:08:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:10,676 INFO L225 Difference]: With dead ends: 2405 [2022-02-15 13:08:10,676 INFO L226 Difference]: Without dead ends: 2383 [2022-02-15 13:08:10,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:10,677 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 161 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:10,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 482 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2022-02-15 13:08:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2022-02-15 13:08:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2022-02-15 13:08:10,703 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2022-02-15 13:08:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:10,703 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2022-02-15 13:08:10,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-02-15 13:08:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2022-02-15 13:08:10,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:10,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:10,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:10,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-02-15 13:08:10,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:10,907 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:10,907 INFO L85 PathProgramCache]: Analyzing trace with hash -321695377, now seen corresponding path program 170 times [2022-02-15 13:08:10,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:10,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832670182] [2022-02-15 13:08:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:10,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:11,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:11,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832670182] [2022-02-15 13:08:11,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832670182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:11,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522296522] [2022-02-15 13:08:11,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:11,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:11,040 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:11,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-15 13:08:11,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:11,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:11,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:11,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:11,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522296522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:11,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:11,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 23 [2022-02-15 13:08:11,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411549326] [2022-02-15 13:08:11,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:11,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:08:11,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:08:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:11,493 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:11,826 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2022-02-15 13:08:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:11,830 INFO L225 Difference]: With dead ends: 2338 [2022-02-15 13:08:11,830 INFO L226 Difference]: Without dead ends: 2331 [2022-02-15 13:08:11,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:11,830 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 138 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:11,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 472 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2022-02-15 13:08:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2022-02-15 13:08:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2022-02-15 13:08:11,856 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2022-02-15 13:08:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:11,856 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2022-02-15 13:08:11,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2022-02-15 13:08:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:11,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:11,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:11,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:12,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:12,060 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash 705937345, now seen corresponding path program 171 times [2022-02-15 13:08:12,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:12,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949144050] [2022-02-15 13:08:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:12,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:12,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:12,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949144050] [2022-02-15 13:08:12,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949144050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:12,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106157788] [2022-02-15 13:08:12,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:12,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:12,171 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:12,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-15 13:08:12,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:08:12,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:12,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:12,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:12,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106157788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:12,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:12,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-02-15 13:08:12,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474269818] [2022-02-15 13:08:12,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:12,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:12,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:12,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:12,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:12,627 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-02-15 13:08:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:12,851 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2022-02-15 13:08:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:08:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 21 [2022-02-15 13:08:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:12,855 INFO L225 Difference]: With dead ends: 2327 [2022-02-15 13:08:12,855 INFO L226 Difference]: Without dead ends: 2314 [2022-02-15 13:08:12,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:12,855 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 189 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:12,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 323 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-02-15 13:08:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2022-02-15 13:08:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.0686138154844693) internal successors, (6619), 2157 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2022-02-15 13:08:12,884 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2022-02-15 13:08:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:12,884 INFO L470 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2022-02-15 13:08:12,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-02-15 13:08:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2022-02-15 13:08:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:12,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:12,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:12,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-02-15 13:08:13,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:13,087 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash 768401063, now seen corresponding path program 172 times [2022-02-15 13:08:13,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:13,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102106292] [2022-02-15 13:08:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:13,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:13,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:13,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102106292] [2022-02-15 13:08:13,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102106292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:13,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064522758] [2022-02-15 13:08:13,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:13,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:13,198 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:13,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-15 13:08:13,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:13,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:13,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:13,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:13,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064522758] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:13,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:13,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 26 [2022-02-15 13:08:13,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928563590] [2022-02-15 13:08:13,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:13,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:13,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:13,659 INFO L87 Difference]: Start difference. First operand 2158 states and 6619 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-02-15 13:08:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:14,064 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2022-02-15 13:08:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:08:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 21 [2022-02-15 13:08:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:14,069 INFO L225 Difference]: With dead ends: 2518 [2022-02-15 13:08:14,069 INFO L226 Difference]: Without dead ends: 2501 [2022-02-15 13:08:14,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:08:14,069 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 126 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:14,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 737 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2022-02-15 13:08:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2022-02-15 13:08:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 3.084070796460177) internal successors, (6970), 2260 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2022-02-15 13:08:14,100 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2022-02-15 13:08:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:14,100 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2022-02-15 13:08:14,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-02-15 13:08:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2022-02-15 13:08:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:14,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:14,103 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:14,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-02-15 13:08:14,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:14,304 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1911863509, now seen corresponding path program 173 times [2022-02-15 13:08:14,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:14,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973971129] [2022-02-15 13:08:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:14,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:14,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:14,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973971129] [2022-02-15 13:08:14,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973971129] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:14,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154210199] [2022-02-15 13:08:14,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:14,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:14,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:14,409 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:14,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-15 13:08:14,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:08:14,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:14,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:14,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154210199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:14,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:14,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2022-02-15 13:08:14,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850584992] [2022-02-15 13:08:14,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:14,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:08:14,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:08:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:08:14,861 INFO L87 Difference]: Start difference. First operand 2261 states and 6970 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-02-15 13:08:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:15,268 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2022-02-15 13:08:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:08:15,268 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 21 [2022-02-15 13:08:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:15,272 INFO L225 Difference]: With dead ends: 2516 [2022-02-15 13:08:15,272 INFO L226 Difference]: Without dead ends: 2498 [2022-02-15 13:08:15,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:15,273 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 158 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:15,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 756 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2022-02-15 13:08:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2022-02-15 13:08:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.0744728577837597) internal successors, (6853), 2229 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2022-02-15 13:08:15,305 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2022-02-15 13:08:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:15,305 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2022-02-15 13:08:15,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-02-15 13:08:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2022-02-15 13:08:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:15,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:15,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:15,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-02-15 13:08:15,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:15,509 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash 303809959, now seen corresponding path program 174 times [2022-02-15 13:08:15,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:15,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337174720] [2022-02-15 13:08:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:15,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:15,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:15,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337174720] [2022-02-15 13:08:15,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337174720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:15,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363086806] [2022-02-15 13:08:15,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:15,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:15,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:15,616 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:15,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-15 13:08:15,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:08:15,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:15,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:15,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:15,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:16,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363086806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:16,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:16,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 24 [2022-02-15 13:08:16,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337279729] [2022-02-15 13:08:16,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:16,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:16,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:16,090 INFO L87 Difference]: Start difference. First operand 2230 states and 6853 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:16,522 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2022-02-15 13:08:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:16,526 INFO L225 Difference]: With dead ends: 2507 [2022-02-15 13:08:16,526 INFO L226 Difference]: Without dead ends: 2485 [2022-02-15 13:08:16,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:16,527 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 133 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:16,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 676 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-02-15 13:08:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2022-02-15 13:08:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.0699458483754514) internal successors, (6803), 2216 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2022-02-15 13:08:16,565 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2022-02-15 13:08:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:16,565 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2022-02-15 13:08:16,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2022-02-15 13:08:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:16,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:16,568 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:16,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:16,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:16,769 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 270210731, now seen corresponding path program 175 times [2022-02-15 13:08:16,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:16,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940480757] [2022-02-15 13:08:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:16,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:16,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:16,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940480757] [2022-02-15 13:08:16,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940480757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:16,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742886297] [2022-02-15 13:08:16,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:16,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:16,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:16,891 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:16,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-15 13:08:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:16,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:16,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:17,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:17,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742886297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:17,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:17,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 23 [2022-02-15 13:08:17,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614695769] [2022-02-15 13:08:17,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:17,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:08:17,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:08:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:17,335 INFO L87 Difference]: Start difference. First operand 2217 states and 6803 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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) [2022-02-15 13:08:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:17,821 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2022-02-15 13:08:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:08:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:17,826 INFO L225 Difference]: With dead ends: 2454 [2022-02-15 13:08:17,826 INFO L226 Difference]: Without dead ends: 2428 [2022-02-15 13:08:17,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:17,826 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 119 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:17,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 673 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:17,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-02-15 13:08:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2022-02-15 13:08:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.068934240362812) internal successors, (6767), 2205 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2022-02-15 13:08:17,862 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2022-02-15 13:08:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:17,862 INFO L470 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2022-02-15 13:08:17,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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) [2022-02-15 13:08:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2022-02-15 13:08:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:17,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:17,872 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:17,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-02-15 13:08:18,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-02-15 13:08:18,073 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash -771365337, now seen corresponding path program 176 times [2022-02-15 13:08:18,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:18,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811091374] [2022-02-15 13:08:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:18,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:18,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:18,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811091374] [2022-02-15 13:08:18,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811091374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:18,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346700437] [2022-02-15 13:08:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:18,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:18,194 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:18,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-15 13:08:18,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:18,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:18,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:18,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346700437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:18,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:18,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-02-15 13:08:18,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117818359] [2022-02-15 13:08:18,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:18,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:08:18,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:18,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:08:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:08:18,608 INFO L87 Difference]: Start difference. First operand 2206 states and 6767 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:19,041 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2022-02-15 13:08:19,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:19,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:19,046 INFO L225 Difference]: With dead ends: 2375 [2022-02-15 13:08:19,046 INFO L226 Difference]: Without dead ends: 2368 [2022-02-15 13:08:19,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:19,047 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 113 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:19,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 619 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2022-02-15 13:08:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2022-02-15 13:08:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.067512460353421) internal successors, (6770), 2207 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2022-02-15 13:08:19,087 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2022-02-15 13:08:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:19,087 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2022-02-15 13:08:19,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2022-02-15 13:08:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:19,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:19,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:19,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:19,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-15 13:08:19,291 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2111325563, now seen corresponding path program 177 times [2022-02-15 13:08:19,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:19,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301341698] [2022-02-15 13:08:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:19,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:19,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:19,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301341698] [2022-02-15 13:08:19,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301341698] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:19,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949825782] [2022-02-15 13:08:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:19,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:19,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:19,406 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:19,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-15 13:08:19,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:08:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:19,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:19,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949825782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:19,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:19,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-02-15 13:08:19,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209196748] [2022-02-15 13:08:19,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:19,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:19,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:19,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:19,898 INFO L87 Difference]: Start difference. First operand 2208 states and 6770 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-02-15 13:08:20,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:20,137 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2022-02-15 13:08:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:08:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 21 [2022-02-15 13:08:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:20,142 INFO L225 Difference]: With dead ends: 2298 [2022-02-15 13:08:20,142 INFO L226 Difference]: Without dead ends: 2285 [2022-02-15 13:08:20,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:20,142 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 121 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:20,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 341 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-02-15 13:08:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2022-02-15 13:08:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.0674259681093394) internal successors, (6733), 2195 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2022-02-15 13:08:20,181 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2022-02-15 13:08:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:20,181 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2022-02-15 13:08:20,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-02-15 13:08:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2022-02-15 13:08:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:20,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:20,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:20,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-15 13:08:20,387 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1937621227, now seen corresponding path program 178 times [2022-02-15 13:08:20,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:20,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734685567] [2022-02-15 13:08:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:20,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:20,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:20,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734685567] [2022-02-15 13:08:20,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734685567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:20,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862170531] [2022-02-15 13:08:20,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:20,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:20,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:20,512 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:20,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-15 13:08:20,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:20,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:20,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:20,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862170531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:20,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:20,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-15 13:08:20,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623805738] [2022-02-15 13:08:20,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:20,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:20,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:20,982 INFO L87 Difference]: Start difference. First operand 2196 states and 6733 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:21,398 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2022-02-15 13:08:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:21,402 INFO L225 Difference]: With dead ends: 2566 [2022-02-15 13:08:21,402 INFO L226 Difference]: Without dead ends: 2549 [2022-02-15 13:08:21,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:08:21,403 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 149 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:21,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 692 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-02-15 13:08:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2022-02-15 13:08:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.072438919845692) internal successors, (7168), 2333 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2022-02-15 13:08:21,440 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2022-02-15 13:08:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:21,440 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2022-02-15 13:08:21,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2022-02-15 13:08:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:21,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:21,444 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:21,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-02-15 13:08:21,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-02-15 13:08:21,644 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash -742643345, now seen corresponding path program 179 times [2022-02-15 13:08:21,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:21,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782217533] [2022-02-15 13:08:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:21,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:21,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:21,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782217533] [2022-02-15 13:08:21,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782217533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:21,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819652808] [2022-02-15 13:08:21,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:21,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:21,754 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:21,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-15 13:08:21,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:08:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:21,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:22,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819652808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:22,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:22,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-15 13:08:22,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933525721] [2022-02-15 13:08:22,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:22,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:22,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:22,214 INFO L87 Difference]: Start difference. First operand 2334 states and 7168 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-02-15 13:08:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:22,560 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2022-02-15 13:08:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:22,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 21 [2022-02-15 13:08:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:22,565 INFO L225 Difference]: With dead ends: 2564 [2022-02-15 13:08:22,565 INFO L226 Difference]: Without dead ends: 2548 [2022-02-15 13:08:22,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:08:22,565 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 163 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:22,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 590 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-02-15 13:08:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2022-02-15 13:08:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 3.066983578219533) internal successors, (7097), 2314 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2022-02-15 13:08:22,602 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2022-02-15 13:08:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:22,602 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2022-02-15 13:08:22,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-02-15 13:08:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2022-02-15 13:08:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:22,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:22,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:22,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-15 13:08:22,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:22,806 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1473030123, now seen corresponding path program 180 times [2022-02-15 13:08:22,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:22,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052021474] [2022-02-15 13:08:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:22,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:22,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:22,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052021474] [2022-02-15 13:08:22,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052021474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:22,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94925010] [2022-02-15 13:08:22,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:22,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:22,917 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:22,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-15 13:08:22,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:08:22,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:22,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:23,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:23,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94925010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:23,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:23,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-02-15 13:08:23,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2190370] [2022-02-15 13:08:23,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:23,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:23,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:23,368 INFO L87 Difference]: Start difference. First operand 2315 states and 7097 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:23,754 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2022-02-15 13:08:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:08:23,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:23,759 INFO L225 Difference]: With dead ends: 2571 [2022-02-15 13:08:23,759 INFO L226 Difference]: Without dead ends: 2553 [2022-02-15 13:08:23,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:23,759 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 156 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:23,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 592 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2022-02-15 13:08:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2022-02-15 13:08:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.0610287707061903) internal successors, (7022), 2294 states have internal predecessors, (7022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2022-02-15 13:08:23,797 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2022-02-15 13:08:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:23,797 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2022-02-15 13:08:23,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2022-02-15 13:08:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:23,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:23,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:23,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-15 13:08:24,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:24,001 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1439430895, now seen corresponding path program 181 times [2022-02-15 13:08:24,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:24,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474359117] [2022-02-15 13:08:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:24,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:24,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:24,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474359117] [2022-02-15 13:08:24,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474359117] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:24,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258707863] [2022-02-15 13:08:24,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:24,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:24,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:24,116 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:24,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-15 13:08:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:24,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:24,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258707863] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:24,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:24,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-02-15 13:08:24,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271703118] [2022-02-15 13:08:24,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:08:24,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:08:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:24,595 INFO L87 Difference]: Start difference. First operand 2295 states and 7022 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2022-02-15 13:08:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:25,056 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2022-02-15 13:08:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:08:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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 21 [2022-02-15 13:08:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:25,061 INFO L225 Difference]: With dead ends: 2576 [2022-02-15 13:08:25,061 INFO L226 Difference]: Without dead ends: 2556 [2022-02-15 13:08:25,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:25,061 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 131 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:25,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 665 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-02-15 13:08:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2022-02-15 13:08:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.0567032967032968) internal successors, (6954), 2275 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2022-02-15 13:08:25,098 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2022-02-15 13:08:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:25,098 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2022-02-15 13:08:25,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2022-02-15 13:08:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2022-02-15 13:08:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:25,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:25,111 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:25,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:25,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:25,312 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash 397854827, now seen corresponding path program 182 times [2022-02-15 13:08:25,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:25,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096469337] [2022-02-15 13:08:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:25,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:25,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:25,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096469337] [2022-02-15 13:08:25,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096469337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:25,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737258635] [2022-02-15 13:08:25,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:25,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:25,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:25,433 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:25,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-15 13:08:25,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:25,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:25,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:25,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:25,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737258635] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:25,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:25,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-02-15 13:08:25,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129706442] [2022-02-15 13:08:25,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:25,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:08:25,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:08:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:08:25,873 INFO L87 Difference]: Start difference. First operand 2276 states and 6954 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-02-15 13:08:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:26,342 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2022-02-15 13:08:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:08:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:26,347 INFO L225 Difference]: With dead ends: 2488 [2022-02-15 13:08:26,347 INFO L226 Difference]: Without dead ends: 2466 [2022-02-15 13:08:26,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:26,348 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 118 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:26,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 581 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2022-02-15 13:08:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2022-02-15 13:08:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.0594235033259425) internal successors, (6899), 2255 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2022-02-15 13:08:26,381 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2022-02-15 13:08:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:26,382 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2022-02-15 13:08:26,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-02-15 13:08:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2022-02-15 13:08:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:26,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:26,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:26,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-02-15 13:08:26,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:26,585 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1826232209, now seen corresponding path program 183 times [2022-02-15 13:08:26,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:26,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250045161] [2022-02-15 13:08:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:26,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:26,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:26,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250045161] [2022-02-15 13:08:26,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250045161] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:26,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641179926] [2022-02-15 13:08:26,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:26,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:26,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:26,733 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:26,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-15 13:08:26,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:08:26,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:26,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:26,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:27,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641179926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:27,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:27,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-02-15 13:08:27,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90460224] [2022-02-15 13:08:27,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:27,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:08:27,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:27,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:08:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:08:27,148 INFO L87 Difference]: Start difference. First operand 2256 states and 6899 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:27,564 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2022-02-15 13:08:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:08:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:27,569 INFO L225 Difference]: With dead ends: 2408 [2022-02-15 13:08:27,569 INFO L226 Difference]: Without dead ends: 2401 [2022-02-15 13:08:27,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:27,569 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 120 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:27,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 534 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-02-15 13:08:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2022-02-15 13:08:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 3.0525386313465783) internal successors, (6914), 2265 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2022-02-15 13:08:27,611 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2022-02-15 13:08:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:27,612 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2022-02-15 13:08:27,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2022-02-15 13:08:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:27,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:27,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:27,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-02-15 13:08:27,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:27,827 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 176382699, now seen corresponding path program 184 times [2022-02-15 13:08:27,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:27,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483324103] [2022-02-15 13:08:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:27,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:27,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:27,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483324103] [2022-02-15 13:08:27,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483324103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:27,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82762535] [2022-02-15 13:08:27,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:27,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:27,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:27,951 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:27,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-15 13:08:27,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:27,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:28,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:28,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82762535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:28,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:28,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 26 [2022-02-15 13:08:28,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440002739] [2022-02-15 13:08:28,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:28,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:28,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:28,434 INFO L87 Difference]: Start difference. First operand 2266 states and 6914 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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) [2022-02-15 13:08:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:28,715 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2022-02-15 13:08:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:08:28,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 21 [2022-02-15 13:08:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:28,720 INFO L225 Difference]: With dead ends: 2482 [2022-02-15 13:08:28,720 INFO L226 Difference]: Without dead ends: 2472 [2022-02-15 13:08:28,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:28,720 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:28,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 457 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2022-02-15 13:08:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2022-02-15 13:08:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.0584642233856894) internal successors, (7010), 2292 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2022-02-15 13:08:28,764 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2022-02-15 13:08:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:28,764 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2022-02-15 13:08:28,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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) [2022-02-15 13:08:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2022-02-15 13:08:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:28,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:28,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:28,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-15 13:08:28,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:28,968 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1791085423, now seen corresponding path program 185 times [2022-02-15 13:08:28,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:28,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881248287] [2022-02-15 13:08:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:28,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:29,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:29,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881248287] [2022-02-15 13:08:29,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881248287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:29,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062968907] [2022-02-15 13:08:29,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:29,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:29,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:29,077 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:29,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-15 13:08:29,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:08:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:29,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:29,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:29,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062968907] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:29,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:29,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 25 [2022-02-15 13:08:29,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814471869] [2022-02-15 13:08:29,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:29,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:08:29,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:08:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:08:29,567 INFO L87 Difference]: Start difference. First operand 2293 states and 7010 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-02-15 13:08:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:29,811 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2022-02-15 13:08:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:08:29,811 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 21 [2022-02-15 13:08:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:29,826 INFO L225 Difference]: With dead ends: 2464 [2022-02-15 13:08:29,826 INFO L226 Difference]: Without dead ends: 2457 [2022-02-15 13:08:29,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:29,827 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:29,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 407 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2022-02-15 13:08:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2022-02-15 13:08:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.05764192139738) internal successors, (7002), 2290 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2022-02-15 13:08:29,859 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2022-02-15 13:08:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:29,859 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2022-02-15 13:08:29,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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) [2022-02-15 13:08:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2022-02-15 13:08:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:29,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:29,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:29,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-15 13:08:30,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:30,063 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash 747837505, now seen corresponding path program 186 times [2022-02-15 13:08:30,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:30,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430141120] [2022-02-15 13:08:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:30,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:30,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:30,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430141120] [2022-02-15 13:08:30,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430141120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:30,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583406051] [2022-02-15 13:08:30,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:30,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:30,187 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:30,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-15 13:08:30,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:08:30,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:30,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:30,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:30,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583406051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:30,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:30,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 24 [2022-02-15 13:08:30,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631751875] [2022-02-15 13:08:30,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:30,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:30,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:30,666 INFO L87 Difference]: Start difference. First operand 2291 states and 7002 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:30,952 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2022-02-15 13:08:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:08:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:30,957 INFO L225 Difference]: With dead ends: 2417 [2022-02-15 13:08:30,957 INFO L226 Difference]: Without dead ends: 2410 [2022-02-15 13:08:30,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:30,957 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 114 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:30,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 456 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2022-02-15 13:08:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2022-02-15 13:08:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.0576671035386633) internal successors, (6999), 2289 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2022-02-15 13:08:30,992 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2022-02-15 13:08:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:30,992 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2022-02-15 13:08:30,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2022-02-15 13:08:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:30,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:30,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:31,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-02-15 13:08:31,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-15 13:08:31,196 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1412563179, now seen corresponding path program 187 times [2022-02-15 13:08:31,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:31,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307516667] [2022-02-15 13:08:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:31,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:31,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:31,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307516667] [2022-02-15 13:08:31,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307516667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:31,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322647847] [2022-02-15 13:08:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:31,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:31,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:31,312 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:31,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-15 13:08:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:31,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:31,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:31,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322647847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:31,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:31,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 26 [2022-02-15 13:08:31,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680613108] [2022-02-15 13:08:31,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:31,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:31,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:31,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:31,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:31,783 INFO L87 Difference]: Start difference. First operand 2290 states and 6999 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-02-15 13:08:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:32,079 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2022-02-15 13:08:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:08:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 21 [2022-02-15 13:08:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:32,084 INFO L225 Difference]: With dead ends: 2563 [2022-02-15 13:08:32,084 INFO L226 Difference]: Without dead ends: 2553 [2022-02-15 13:08:32,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:32,084 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 180 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:32,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 453 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2022-02-15 13:08:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2022-02-15 13:08:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.06480686695279) internal successors, (7141), 2330 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2022-02-15 13:08:32,122 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2022-02-15 13:08:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:32,122 INFO L470 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2022-02-15 13:08:32,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-02-15 13:08:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2022-02-15 13:08:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:32,125 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:32,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-02-15 13:08:32,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-15 13:08:32,326 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1267701393, now seen corresponding path program 188 times [2022-02-15 13:08:32,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:32,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173932614] [2022-02-15 13:08:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:32,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:32,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:32,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173932614] [2022-02-15 13:08:32,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173932614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:32,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209510830] [2022-02-15 13:08:32,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:32,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:32,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:32,435 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:32,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-15 13:08:32,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:32,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:32,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:32,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:32,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:32,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209510830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:32,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:32,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 25 [2022-02-15 13:08:32,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635048693] [2022-02-15 13:08:32,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:32,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:08:32,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:08:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:08:32,892 INFO L87 Difference]: Start difference. First operand 2331 states and 7141 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-02-15 13:08:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:33,205 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2022-02-15 13:08:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:08:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 21 [2022-02-15 13:08:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:33,210 INFO L225 Difference]: With dead ends: 2544 [2022-02-15 13:08:33,211 INFO L226 Difference]: Without dead ends: 2537 [2022-02-15 13:08:33,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:33,211 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 145 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:33,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 495 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-02-15 13:08:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2022-02-15 13:08:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.063601203266008) internal successors, (7129), 2327 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2022-02-15 13:08:33,248 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2022-02-15 13:08:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:33,248 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2022-02-15 13:08:33,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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) [2022-02-15 13:08:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2022-02-15 13:08:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:33,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:33,252 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:33,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-02-15 13:08:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:33,467 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1984017985, now seen corresponding path program 189 times [2022-02-15 13:08:33,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:33,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544387868] [2022-02-15 13:08:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:33,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:33,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:33,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544387868] [2022-02-15 13:08:33,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544387868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:33,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095697328] [2022-02-15 13:08:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:33,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:33,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:33,574 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:33,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-15 13:08:33,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:08:33,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:33,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:34,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095697328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:34,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:34,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 24 [2022-02-15 13:08:34,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201425599] [2022-02-15 13:08:34,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:34,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:34,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:34,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:34,045 INFO L87 Difference]: Start difference. First operand 2328 states and 7129 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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) [2022-02-15 13:08:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:34,386 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2022-02-15 13:08:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:34,391 INFO L225 Difference]: With dead ends: 2523 [2022-02-15 13:08:34,391 INFO L226 Difference]: Without dead ends: 2510 [2022-02-15 13:08:34,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:34,391 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 106 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:34,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 540 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2022-02-15 13:08:34,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2022-02-15 13:08:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.0614261168384878) internal successors, (7127), 2328 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2022-02-15 13:08:34,421 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2022-02-15 13:08:34,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:34,421 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2022-02-15 13:08:34,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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) [2022-02-15 13:08:34,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2022-02-15 13:08:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:34,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:34,424 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:34,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:34,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-15 13:08:34,625 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:34,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1775719509, now seen corresponding path program 190 times [2022-02-15 13:08:34,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:34,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649947488] [2022-02-15 13:08:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:34,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:34,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:34,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649947488] [2022-02-15 13:08:34,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649947488] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:34,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291671800] [2022-02-15 13:08:34,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:34,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:34,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:34,753 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:34,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-15 13:08:34,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:34,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:34,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:35,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291671800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:35,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:35,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 23 [2022-02-15 13:08:35,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425338183] [2022-02-15 13:08:35,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:35,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:08:35,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:08:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:35,197 INFO L87 Difference]: Start difference. First operand 2329 states and 7127 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:35,495 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2022-02-15 13:08:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:35,496 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:35,499 INFO L225 Difference]: With dead ends: 2467 [2022-02-15 13:08:35,499 INFO L226 Difference]: Without dead ends: 2460 [2022-02-15 13:08:35,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:35,500 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 107 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:35,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 443 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2022-02-15 13:08:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2022-02-15 13:08:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 3.0614789337919173) internal successors, (7121), 2326 states have internal predecessors, (7121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2022-02-15 13:08:35,527 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2022-02-15 13:08:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:35,527 INFO L470 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2022-02-15 13:08:35,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2022-02-15 13:08:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:35,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:35,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:35,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:35,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-02-15 13:08:35,730 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1300338723, now seen corresponding path program 191 times [2022-02-15 13:08:35,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:35,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396473404] [2022-02-15 13:08:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:35,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:35,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:35,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396473404] [2022-02-15 13:08:35,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396473404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:35,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26320443] [2022-02-15 13:08:35,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:35,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:35,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:35,845 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:35,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-15 13:08:35,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:08:35,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:36,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:36,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26320443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:36,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:36,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 23 [2022-02-15 13:08:36,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223758071] [2022-02-15 13:08:36,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:36,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:08:36,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:08:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:36,311 INFO L87 Difference]: Start difference. First operand 2327 states and 7121 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:36,584 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2022-02-15 13:08:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:08:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:36,588 INFO L225 Difference]: With dead ends: 2438 [2022-02-15 13:08:36,588 INFO L226 Difference]: Without dead ends: 2422 [2022-02-15 13:08:36,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:36,588 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 121 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:36,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 345 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2022-02-15 13:08:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2022-02-15 13:08:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.0617443868739205) internal successors, (7091), 2316 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2022-02-15 13:08:36,615 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2022-02-15 13:08:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:36,615 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2022-02-15 13:08:36,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2022-02-15 13:08:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:36,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:36,618 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:36,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-02-15 13:08:36,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-02-15 13:08:36,819 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1079452395, now seen corresponding path program 192 times [2022-02-15 13:08:36,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:36,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396562767] [2022-02-15 13:08:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:36,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:36,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:36,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396562767] [2022-02-15 13:08:36,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396562767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:36,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424401533] [2022-02-15 13:08:36,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:36,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:36,926 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:36,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-15 13:08:36,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:08:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:37,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:37,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424401533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:37,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:37,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 26 [2022-02-15 13:08:37,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326155195] [2022-02-15 13:08:37,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:37,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:08:37,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:08:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:08:37,399 INFO L87 Difference]: Start difference. First operand 2317 states and 7091 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-02-15 13:08:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:37,718 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2022-02-15 13:08:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 21 [2022-02-15 13:08:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:37,722 INFO L225 Difference]: With dead ends: 2637 [2022-02-15 13:08:37,722 INFO L226 Difference]: Without dead ends: 2627 [2022-02-15 13:08:37,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:37,722 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 149 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:37,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 547 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2022-02-15 13:08:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2022-02-15 13:08:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.0697969543147208) internal successors, (7257), 2364 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2022-02-15 13:08:37,752 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2022-02-15 13:08:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2022-02-15 13:08:37,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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) [2022-02-15 13:08:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2022-02-15 13:08:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:37,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:37,755 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:37,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-02-15 13:08:37,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-15 13:08:37,955 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1600812177, now seen corresponding path program 193 times [2022-02-15 13:08:37,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:37,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415348353] [2022-02-15 13:08:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:37,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:38,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:38,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415348353] [2022-02-15 13:08:38,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415348353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:38,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562952327] [2022-02-15 13:08:38,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:38,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:38,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:38,064 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:38,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-15 13:08:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:38,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:38,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:38,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562952327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:38,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:38,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2022-02-15 13:08:38,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200197132] [2022-02-15 13:08:38,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:38,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:08:38,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:38,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:08:38,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:08:38,498 INFO L87 Difference]: Start difference. First operand 2365 states and 7257 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:38,793 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2022-02-15 13:08:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:38,798 INFO L225 Difference]: With dead ends: 2621 [2022-02-15 13:08:38,799 INFO L226 Difference]: Without dead ends: 2614 [2022-02-15 13:08:38,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:38,799 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 159 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:38,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 473 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2022-02-15 13:08:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2022-02-15 13:08:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.068731438268986) internal successors, (7233), 2357 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2022-02-15 13:08:38,837 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2022-02-15 13:08:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:38,837 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2022-02-15 13:08:38,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2022-02-15 13:08:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:38,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:38,841 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:38,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-02-15 13:08:39,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:39,041 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1650907201, now seen corresponding path program 194 times [2022-02-15 13:08:39,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:39,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803714823] [2022-02-15 13:08:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:39,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:39,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:39,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803714823] [2022-02-15 13:08:39,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803714823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:39,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798584112] [2022-02-15 13:08:39,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:39,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:39,154 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:39,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-15 13:08:39,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:39,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:39,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:39,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:39,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:39,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798584112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:39,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:39,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 24 [2022-02-15 13:08:39,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798029776] [2022-02-15 13:08:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:39,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:08:39,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:39,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:08:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:08:39,605 INFO L87 Difference]: Start difference. First operand 2358 states and 7233 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:39,919 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2022-02-15 13:08:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:08:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:39,923 INFO L225 Difference]: With dead ends: 2635 [2022-02-15 13:08:39,923 INFO L226 Difference]: Without dead ends: 2622 [2022-02-15 13:08:39,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:39,924 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 160 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:39,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 491 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2022-02-15 13:08:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2022-02-15 13:08:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.0671197960917587) internal successors, (7220), 2354 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2022-02-15 13:08:39,953 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2022-02-15 13:08:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:39,953 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2022-02-15 13:08:39,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2022-02-15 13:08:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:39,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:39,956 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:39,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-02-15 13:08:40,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:40,157 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2108830293, now seen corresponding path program 195 times [2022-02-15 13:08:40,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:40,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344814990] [2022-02-15 13:08:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:40,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:40,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:40,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344814990] [2022-02-15 13:08:40,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344814990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:40,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814031045] [2022-02-15 13:08:40,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:40,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:40,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:40,270 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:40,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-15 13:08:40,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:08:40,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:40,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:40,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:40,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:40,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814031045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:40,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:40,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 23 [2022-02-15 13:08:40,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948244281] [2022-02-15 13:08:40,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:40,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:08:40,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:08:40,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:40,702 INFO L87 Difference]: Start difference. First operand 2355 states and 7220 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2022-02-15 13:08:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:41,073 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2022-02-15 13:08:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:41,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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 21 [2022-02-15 13:08:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:41,077 INFO L225 Difference]: With dead ends: 2598 [2022-02-15 13:08:41,077 INFO L226 Difference]: Without dead ends: 2582 [2022-02-15 13:08:41,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:08:41,078 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 111 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:41,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 547 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-02-15 13:08:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2022-02-15 13:08:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.0659293917481922) internal successors, (7208), 2351 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2022-02-15 13:08:41,114 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2022-02-15 13:08:41,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:41,114 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2022-02-15 13:08:41,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2022-02-15 13:08:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2022-02-15 13:08:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:08:41,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:41,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:41,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:41,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:41,317 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1598391681, now seen corresponding path program 196 times [2022-02-15 13:08:41,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:41,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252618103] [2022-02-15 13:08:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:41,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:41,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:41,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252618103] [2022-02-15 13:08:41,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252618103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:41,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788457665] [2022-02-15 13:08:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:41,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:41,442 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:41,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-15 13:08:41,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:41,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-15 13:08:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:41,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:41,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788457665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:41,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:41,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-02-15 13:08:41,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395749205] [2022-02-15 13:08:41,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:41,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:08:41,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:08:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:08:41,879 INFO L87 Difference]: Start difference. First operand 2352 states and 7208 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-02-15 13:08:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:42,211 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2022-02-15 13:08:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:08:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:08:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:42,215 INFO L225 Difference]: With dead ends: 2537 [2022-02-15 13:08:42,215 INFO L226 Difference]: Without dead ends: 2530 [2022-02-15 13:08:42,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:08:42,215 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:42,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 422 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2022-02-15 13:08:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2022-02-15 13:08:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.066013628620102) internal successors, (7199), 2348 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2022-02-15 13:08:42,243 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2022-02-15 13:08:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:42,243 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2022-02-15 13:08:42,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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) [2022-02-15 13:08:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2022-02-15 13:08:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:42,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:42,245 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:42,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-02-15 13:08:42,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:42,446 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:42,446 INFO L85 PathProgramCache]: Analyzing trace with hash -252562425, now seen corresponding path program 197 times [2022-02-15 13:08:42,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:42,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004576596] [2022-02-15 13:08:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:42,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:42,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:42,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004576596] [2022-02-15 13:08:42,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004576596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:42,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595730578] [2022-02-15 13:08:42,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:42,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:42,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:42,497 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:42,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-15 13:08:42,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:08:42,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:42,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:42,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:42,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595730578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:42,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:42,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-02-15 13:08:42,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904817836] [2022-02-15 13:08:42,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:42,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:08:42,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:42,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:08:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:08:42,640 INFO L87 Difference]: Start difference. First operand 2349 states and 7199 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:42,785 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2022-02-15 13:08:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:08:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:42,790 INFO L225 Difference]: With dead ends: 3357 [2022-02-15 13:08:42,790 INFO L226 Difference]: Without dead ends: 3337 [2022-02-15 13:08:42,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:08:42,791 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:42,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 111 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:08:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2022-02-15 13:08:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2022-02-15 13:08:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.0682885189927442) internal successors, (7189), 2343 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2022-02-15 13:08:42,827 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2022-02-15 13:08:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:42,827 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2022-02-15 13:08:42,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2022-02-15 13:08:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:42,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:42,830 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:42,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-15 13:08:43,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-15 13:08:43,030 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1864225815, now seen corresponding path program 198 times [2022-02-15 13:08:43,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:43,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307750676] [2022-02-15 13:08:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:43,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:43,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:43,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307750676] [2022-02-15 13:08:43,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307750676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:43,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201974272] [2022-02-15 13:08:43,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:43,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:43,083 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-15 13:08:43,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:08:43,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:43,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:43,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:43,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201974272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:43,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:43,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-02-15 13:08:43,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660187865] [2022-02-15 13:08:43,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:43,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:08:43,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:08:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:08:43,210 INFO L87 Difference]: Start difference. First operand 2344 states and 7189 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:43,335 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2022-02-15 13:08:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:08:43,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:43,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:43,340 INFO L225 Difference]: With dead ends: 3420 [2022-02-15 13:08:43,340 INFO L226 Difference]: Without dead ends: 3420 [2022-02-15 13:08:43,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:08:43,340 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:43,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 94 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:08:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2022-02-15 13:08:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2022-02-15 13:08:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.0670297444490995) internal successors, (7321), 2387 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:43,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2022-02-15 13:08:43,377 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2022-02-15 13:08:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:43,377 INFO L470 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2022-02-15 13:08:43,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2022-02-15 13:08:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:43,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:43,380 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:43,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-15 13:08:43,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-15 13:08:43,581 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1042764981, now seen corresponding path program 199 times [2022-02-15 13:08:43,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:43,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838040702] [2022-02-15 13:08:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:43,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:43,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:43,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838040702] [2022-02-15 13:08:43,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838040702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:43,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685069479] [2022-02-15 13:08:43,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:43,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:43,631 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:43,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-15 13:08:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:43,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:43,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:43,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:43,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685069479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:43,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:43,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:43,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975118740] [2022-02-15 13:08:43,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:43,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:43,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:43,776 INFO L87 Difference]: Start difference. First operand 2388 states and 7321 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:44,252 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2022-02-15 13:08:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:08:44,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:44,265 INFO L225 Difference]: With dead ends: 4110 [2022-02-15 13:08:44,265 INFO L226 Difference]: Without dead ends: 4102 [2022-02-15 13:08:44,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:08:44,266 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 230 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:44,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 164 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-02-15 13:08:44,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2022-02-15 13:08:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.1119773210489017) internal successors, (8782), 2822 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2022-02-15 13:08:44,322 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2022-02-15 13:08:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:44,322 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2022-02-15 13:08:44,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2022-02-15 13:08:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:44,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:44,325 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:44,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:44,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-15 13:08:44,541 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash -471310175, now seen corresponding path program 200 times [2022-02-15 13:08:44,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:44,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89773625] [2022-02-15 13:08:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:44,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:44,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:44,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89773625] [2022-02-15 13:08:44,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89773625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:44,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3636465] [2022-02-15 13:08:44,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:44,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:44,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:44,591 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:44,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-15 13:08:44,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:44,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:44,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:44,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:44,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:44,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3636465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:44,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:44,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:44,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110174580] [2022-02-15 13:08:44,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:44,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:44,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:44,723 INFO L87 Difference]: Start difference. First operand 2823 states and 8782 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:45,202 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2022-02-15 13:08:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:08:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:45,210 INFO L225 Difference]: With dead ends: 4077 [2022-02-15 13:08:45,210 INFO L226 Difference]: Without dead ends: 4071 [2022-02-15 13:08:45,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:08:45,211 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 213 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:45,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 161 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2022-02-15 13:08:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2022-02-15 13:08:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.0726172465960664) internal successors, (8124), 2644 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2022-02-15 13:08:45,271 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2022-02-15 13:08:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:45,271 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2022-02-15 13:08:45,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2022-02-15 13:08:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:45,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:45,275 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:45,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-02-15 13:08:45,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-15 13:08:45,475 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1892085575, now seen corresponding path program 201 times [2022-02-15 13:08:45,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:45,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464728873] [2022-02-15 13:08:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:45,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:45,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:45,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464728873] [2022-02-15 13:08:45,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464728873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:45,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772879026] [2022-02-15 13:08:45,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:45,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:45,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:45,527 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:45,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-15 13:08:45,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:08:45,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:45,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:45,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:45,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772879026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:45,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:45,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:45,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644257929] [2022-02-15 13:08:45,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:45,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:45,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:45,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:45,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:45,663 INFO L87 Difference]: Start difference. First operand 2645 states and 8124 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:46,170 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2022-02-15 13:08:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:08:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:46,175 INFO L225 Difference]: With dead ends: 3589 [2022-02-15 13:08:46,175 INFO L226 Difference]: Without dead ends: 3589 [2022-02-15 13:08:46,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:08:46,176 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:46,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 182 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-02-15 13:08:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2022-02-15 13:08:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 3.094017094017094) internal successors, (8688), 2808 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2022-02-15 13:08:46,216 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2022-02-15 13:08:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:46,216 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2022-02-15 13:08:46,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2022-02-15 13:08:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:46,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:46,219 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:46,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-15 13:08:46,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-02-15 13:08:46,420 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1427494471, now seen corresponding path program 202 times [2022-02-15 13:08:46,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:46,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177328759] [2022-02-15 13:08:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:46,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:46,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:46,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177328759] [2022-02-15 13:08:46,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177328759] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:46,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101911869] [2022-02-15 13:08:46,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:46,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:46,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:46,484 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:46,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-15 13:08:46,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:46,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:46,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:46,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101911869] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:46,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:46,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:46,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122475335] [2022-02-15 13:08:46,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:46,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:46,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:46,613 INFO L87 Difference]: Start difference. First operand 2809 states and 8688 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:47,120 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2022-02-15 13:08:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:08:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:47,127 INFO L225 Difference]: With dead ends: 3314 [2022-02-15 13:08:47,127 INFO L226 Difference]: Without dead ends: 3310 [2022-02-15 13:08:47,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:08:47,128 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 167 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:47,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 146 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:08:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2022-02-15 13:08:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2022-02-15 13:08:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 3.0532168387609215) internal successors, (7688), 2518 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2022-02-15 13:08:47,175 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2022-02-15 13:08:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:47,175 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2022-02-15 13:08:47,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2022-02-15 13:08:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:47,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:47,179 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:47,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:47,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:47,379 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash 63919627, now seen corresponding path program 203 times [2022-02-15 13:08:47,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:47,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040529277] [2022-02-15 13:08:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:47,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:47,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:47,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040529277] [2022-02-15 13:08:47,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040529277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:47,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39171764] [2022-02-15 13:08:47,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:47,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:47,432 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:47,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-15 13:08:47,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:08:47,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:47,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:47,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:47,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:47,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39171764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:47,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:47,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:47,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471504388] [2022-02-15 13:08:47,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:47,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:47,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:47,569 INFO L87 Difference]: Start difference. First operand 2519 states and 7688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:48,034 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2022-02-15 13:08:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:08:48,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:48,041 INFO L225 Difference]: With dead ends: 3834 [2022-02-15 13:08:48,042 INFO L226 Difference]: Without dead ends: 3825 [2022-02-15 13:08:48,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:08:48,042 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 216 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:48,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 134 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2022-02-15 13:08:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2022-02-15 13:08:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.0544323483670297) internal successors, (7856), 2572 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2022-02-15 13:08:48,095 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2022-02-15 13:08:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:48,095 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2022-02-15 13:08:48,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2022-02-15 13:08:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:48,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:48,099 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:48,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-02-15 13:08:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-02-15 13:08:48,299 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -523825695, now seen corresponding path program 204 times [2022-02-15 13:08:48,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:48,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155479552] [2022-02-15 13:08:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:48,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:48,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:48,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155479552] [2022-02-15 13:08:48,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155479552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:48,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258289517] [2022-02-15 13:08:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:48,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:48,357 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:48,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-15 13:08:48,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:08:48,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:48,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:48,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258289517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:48,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:48,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:48,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211539692] [2022-02-15 13:08:48,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:48,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:48,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:48,500 INFO L87 Difference]: Start difference. First operand 2573 states and 7856 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:48,930 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2022-02-15 13:08:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:08:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:48,937 INFO L225 Difference]: With dead ends: 3887 [2022-02-15 13:08:48,938 INFO L226 Difference]: Without dead ends: 3875 [2022-02-15 13:08:48,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:08:48,938 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 238 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:48,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 138 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2022-02-15 13:08:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2022-02-15 13:08:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 3.0543143297380584) internal successors, (7929), 2596 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2022-02-15 13:08:48,990 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2022-02-15 13:08:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:48,990 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2022-02-15 13:08:48,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2022-02-15 13:08:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:48,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:48,994 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:49,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-02-15 13:08:49,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-15 13:08:49,194 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1564061493, now seen corresponding path program 205 times [2022-02-15 13:08:49,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:49,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624870846] [2022-02-15 13:08:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:49,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:49,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:49,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624870846] [2022-02-15 13:08:49,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624870846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:49,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227364933] [2022-02-15 13:08:49,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:49,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:49,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:49,252 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:49,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-15 13:08:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:49,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:49,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:49,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227364933] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:49,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:49,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:49,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985803689] [2022-02-15 13:08:49,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:49,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:49,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:49,396 INFO L87 Difference]: Start difference. First operand 2597 states and 7929 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:49,767 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2022-02-15 13:08:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:08:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:49,774 INFO L225 Difference]: With dead ends: 3976 [2022-02-15 13:08:49,775 INFO L226 Difference]: Without dead ends: 3961 [2022-02-15 13:08:49,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:08:49,775 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 170 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:49,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 130 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:08:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2022-02-15 13:08:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2022-02-15 13:08:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0478194338179034) internal successors, (7967), 2614 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2022-02-15 13:08:49,838 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2022-02-15 13:08:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:49,838 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2022-02-15 13:08:49,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2022-02-15 13:08:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:49,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:49,842 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:49,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:50,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:50,042 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash 548367137, now seen corresponding path program 206 times [2022-02-15 13:08:50,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:50,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535320943] [2022-02-15 13:08:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:50,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:50,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:50,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535320943] [2022-02-15 13:08:50,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535320943] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:50,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277909262] [2022-02-15 13:08:50,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:50,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:50,096 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:50,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-15 13:08:50,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:50,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:50,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:50,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277909262] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:50,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:50,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:08:50,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032584961] [2022-02-15 13:08:50,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:50,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:50,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:50,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:50,239 INFO L87 Difference]: Start difference. First operand 2615 states and 7967 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:50,519 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2022-02-15 13:08:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:08:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:50,526 INFO L225 Difference]: With dead ends: 3613 [2022-02-15 13:08:50,526 INFO L226 Difference]: Without dead ends: 3598 [2022-02-15 13:08:50,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 13:08:50,527 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 102 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:50,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 167 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:08:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-02-15 13:08:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2022-02-15 13:08:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0459066564651875) internal successors, (7962), 2614 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2022-02-15 13:08:50,577 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2022-02-15 13:08:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:50,578 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2022-02-15 13:08:50,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2022-02-15 13:08:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:50,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:50,582 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:50,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:50,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:50,782 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:50,782 INFO L85 PathProgramCache]: Analyzing trace with hash 387158667, now seen corresponding path program 207 times [2022-02-15 13:08:50,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:50,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23241017] [2022-02-15 13:08:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:50,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:50,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:50,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23241017] [2022-02-15 13:08:50,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23241017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:50,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256284393] [2022-02-15 13:08:50,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:50,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:50,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:50,831 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:50,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-15 13:08:50,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:08:50,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:50,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:50,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:50,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:50,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256284393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:50,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:50,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-02-15 13:08:50,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572217915] [2022-02-15 13:08:50,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:50,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:50,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:50,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:50,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:50,978 INFO L87 Difference]: Start difference. First operand 2615 states and 7962 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:08:51,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:51,512 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2022-02-15 13:08:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:08:51,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2022-02-15 13:08:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:51,519 INFO L225 Difference]: With dead ends: 3520 [2022-02-15 13:08:51,519 INFO L226 Difference]: Without dead ends: 3511 [2022-02-15 13:08:51,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:08:51,519 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:51,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 180 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2022-02-15 13:08:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2022-02-15 13:08:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.068287450840186) internal successors, (8582), 2797 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2022-02-15 13:08:51,568 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2022-02-15 13:08:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:51,568 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2022-02-15 13:08:51,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:08:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2022-02-15 13:08:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:51,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:51,572 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:51,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-15 13:08:51,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-02-15 13:08:51,772 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash -77432437, now seen corresponding path program 208 times [2022-02-15 13:08:51,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:51,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204359950] [2022-02-15 13:08:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:51,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:51,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:51,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204359950] [2022-02-15 13:08:51,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204359950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:51,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442621255] [2022-02-15 13:08:51,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:51,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:51,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:51,819 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:51,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-15 13:08:51,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:51,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:51,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:51,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442621255] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:51,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:51,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-02-15 13:08:51,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897180370] [2022-02-15 13:08:51,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:51,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:51,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:51,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:51,957 INFO L87 Difference]: Start difference. First operand 2798 states and 8582 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:52,580 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2022-02-15 13:08:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:08:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:52,585 INFO L225 Difference]: With dead ends: 3291 [2022-02-15 13:08:52,586 INFO L226 Difference]: Without dead ends: 3283 [2022-02-15 13:08:52,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:08:52,586 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 176 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:52,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 209 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-02-15 13:08:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2022-02-15 13:08:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.0369351669941063) internal successors, (7729), 2545 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2022-02-15 13:08:52,628 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2022-02-15 13:08:52,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:52,628 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2022-02-15 13:08:52,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2022-02-15 13:08:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:52,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:52,632 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:52,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-15 13:08:52,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:52,832 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -111031665, now seen corresponding path program 209 times [2022-02-15 13:08:52,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:52,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186881774] [2022-02-15 13:08:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:52,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:52,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:52,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186881774] [2022-02-15 13:08:52,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186881774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:52,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502317268] [2022-02-15 13:08:52,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:52,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:52,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:52,887 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:52,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-15 13:08:52,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:08:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:52,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:53,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:53,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502317268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:53,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:53,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-02-15 13:08:53,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075436665] [2022-02-15 13:08:53,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:53,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:08:53,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:08:53,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:08:53,040 INFO L87 Difference]: Start difference. First operand 2546 states and 7729 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:53,582 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2022-02-15 13:08:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:08:53,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:53,588 INFO L225 Difference]: With dead ends: 2975 [2022-02-15 13:08:53,588 INFO L226 Difference]: Without dead ends: 2967 [2022-02-15 13:08:53,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:08:53,589 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:53,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 159 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2022-02-15 13:08:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2022-02-15 13:08:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.037846273897776) internal successors, (7786), 2563 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2022-02-15 13:08:53,636 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2022-02-15 13:08:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:53,637 INFO L470 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2022-02-15 13:08:53,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2022-02-15 13:08:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:53,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:53,641 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:53,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-02-15 13:08:53,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-15 13:08:53,841 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash 979064775, now seen corresponding path program 210 times [2022-02-15 13:08:53,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:53,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882260666] [2022-02-15 13:08:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:53,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:53,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:53,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882260666] [2022-02-15 13:08:53,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882260666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:53,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863232172] [2022-02-15 13:08:53,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:53,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:53,887 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:53,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-15 13:08:53,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:08:53,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:53,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:54,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:54,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863232172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:54,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:54,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-02-15 13:08:54,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616840826] [2022-02-15 13:08:54,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:54,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:54,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:54,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:54,051 INFO L87 Difference]: Start difference. First operand 2564 states and 7786 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:54,519 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2022-02-15 13:08:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:08:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:54,525 INFO L225 Difference]: With dead ends: 3590 [2022-02-15 13:08:54,525 INFO L226 Difference]: Without dead ends: 3575 [2022-02-15 13:08:54,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:08:54,525 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 232 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:54,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 156 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2022-02-15 13:08:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2022-02-15 13:08:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.0612021857923497) internal successors, (8403), 2745 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2022-02-15 13:08:54,567 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2022-02-15 13:08:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:54,567 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2022-02-15 13:08:54,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2022-02-15 13:08:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:54,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:54,571 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:54,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-02-15 13:08:54,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-02-15 13:08:54,772 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash 514473671, now seen corresponding path program 211 times [2022-02-15 13:08:54,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:54,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231240367] [2022-02-15 13:08:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:54,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:54,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:54,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231240367] [2022-02-15 13:08:54,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231240367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:54,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832048020] [2022-02-15 13:08:54,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:54,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:54,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:54,815 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:54,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-15 13:08:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:54,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:54,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832048020] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:54,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:54,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-02-15 13:08:54,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556976939] [2022-02-15 13:08:54,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:54,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:54,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:54,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:54,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:54,959 INFO L87 Difference]: Start difference. First operand 2746 states and 8403 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:55,600 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2022-02-15 13:08:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:08:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:55,606 INFO L225 Difference]: With dead ends: 3290 [2022-02-15 13:08:55,607 INFO L226 Difference]: Without dead ends: 3284 [2022-02-15 13:08:55,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:08:55,607 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 170 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:55,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 217 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2022-02-15 13:08:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2022-02-15 13:08:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.0441232407759604) internal successors, (8003), 2629 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2022-02-15 13:08:55,657 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2022-02-15 13:08:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:55,657 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2022-02-15 13:08:55,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2022-02-15 13:08:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:55,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:55,661 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:55,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:55,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-02-15 13:08:55,862 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash 480874443, now seen corresponding path program 212 times [2022-02-15 13:08:55,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:55,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856375699] [2022-02-15 13:08:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:55,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:55,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:55,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856375699] [2022-02-15 13:08:55,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856375699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:55,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699137402] [2022-02-15 13:08:55,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:55,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:55,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:55,918 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:55,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-15 13:08:55,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:56,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:56,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699137402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:56,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:56,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 20 [2022-02-15 13:08:56,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706792367] [2022-02-15 13:08:56,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:56,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:08:56,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:08:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:08:56,092 INFO L87 Difference]: Start difference. First operand 2630 states and 8003 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:56,671 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2022-02-15 13:08:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:08:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:56,677 INFO L225 Difference]: With dead ends: 3240 [2022-02-15 13:08:56,678 INFO L226 Difference]: Without dead ends: 3228 [2022-02-15 13:08:56,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:08:56,679 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 221 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:56,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 157 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:08:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-02-15 13:08:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2022-02-15 13:08:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.048206710374084) internal successors, (7904), 2593 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2022-02-15 13:08:56,743 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2022-02-15 13:08:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:56,743 INFO L470 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2022-02-15 13:08:56,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2022-02-15 13:08:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:56,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:56,746 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:56,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-02-15 13:08:56,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:56,947 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash -560701625, now seen corresponding path program 213 times [2022-02-15 13:08:56,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:56,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367434973] [2022-02-15 13:08:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:56,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:57,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:57,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367434973] [2022-02-15 13:08:57,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367434973] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:57,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366810703] [2022-02-15 13:08:57,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:57,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:57,002 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:57,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-15 13:08:57,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:08:57,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:57,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:57,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:57,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366810703] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:57,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:57,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-02-15 13:08:57,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406047953] [2022-02-15 13:08:57,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:57,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:08:57,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:08:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:08:57,157 INFO L87 Difference]: Start difference. First operand 2594 states and 7904 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:57,700 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2022-02-15 13:08:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:08:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:57,706 INFO L225 Difference]: With dead ends: 3083 [2022-02-15 13:08:57,706 INFO L226 Difference]: Without dead ends: 3071 [2022-02-15 13:08:57,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:08:57,707 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:57,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 164 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2022-02-15 13:08:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2022-02-15 13:08:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.050133945656334) internal successors, (7970), 2613 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2022-02-15 13:08:57,752 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2022-02-15 13:08:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:57,752 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2022-02-15 13:08:57,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2022-02-15 13:08:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:57,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:57,756 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:57,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:57,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-02-15 13:08:57,956 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2146682357, now seen corresponding path program 214 times [2022-02-15 13:08:57,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:57,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194089760] [2022-02-15 13:08:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:57,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:57,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:57,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194089760] [2022-02-15 13:08:57,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194089760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:57,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565503385] [2022-02-15 13:08:57,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:57,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:57,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:57,997 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:57,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-15 13:08:58,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:58,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:58,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:58,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:58,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565503385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:58,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:58,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-02-15 13:08:58,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612440856] [2022-02-15 13:08:58,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:58,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:58,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:58,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:58,153 INFO L87 Difference]: Start difference. First operand 2614 states and 7970 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:58,626 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2022-02-15 13:08:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:08:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:08:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:58,634 INFO L225 Difference]: With dead ends: 3813 [2022-02-15 13:08:58,634 INFO L226 Difference]: Without dead ends: 3801 [2022-02-15 13:08:58,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:08:58,634 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 228 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:58,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 156 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2022-02-15 13:08:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2022-02-15 13:08:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.0708661417322833) internal successors, (8970), 2921 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2022-02-15 13:08:58,689 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2022-02-15 13:08:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:58,689 INFO L470 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2022-02-15 13:08:58,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2022-02-15 13:08:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:58,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:58,693 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:58,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-02-15 13:08:58,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-02-15 13:08:58,894 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:08:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1683693835, now seen corresponding path program 215 times [2022-02-15 13:08:58,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:58,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883742176] [2022-02-15 13:08:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:58,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:58,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:58,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883742176] [2022-02-15 13:08:58,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883742176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:58,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884446506] [2022-02-15 13:08:58,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:58,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:58,935 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:58,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-15 13:08:58,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:08:58,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:08:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:59,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:59,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884446506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:59,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:59,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-02-15 13:08:59,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428422285] [2022-02-15 13:08:59,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:59,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:08:59,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:59,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:08:59,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:08:59,090 INFO L87 Difference]: Start difference. First operand 2922 states and 8970 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:08:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:59,772 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2022-02-15 13:08:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:08:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2022-02-15 13:08:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:59,778 INFO L225 Difference]: With dead ends: 3570 [2022-02-15 13:08:59,778 INFO L226 Difference]: Without dead ends: 3564 [2022-02-15 13:08:59,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:08:59,780 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 206 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:59,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 158 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:59,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-02-15 13:08:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2022-02-15 13:08:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2829 states have (on average 3.0572640509013786) internal successors, (8649), 2829 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2022-02-15 13:08:59,839 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2022-02-15 13:08:59,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:59,840 INFO L470 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2022-02-15 13:08:59,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:08:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2022-02-15 13:08:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:08:59,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:59,844 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:59,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-15 13:09:00,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-02-15 13:09:00,044 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1650094607, now seen corresponding path program 216 times [2022-02-15 13:09:00,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:00,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70357121] [2022-02-15 13:09:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:00,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:00,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:00,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70357121] [2022-02-15 13:09:00,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70357121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:00,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592208632] [2022-02-15 13:09:00,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:00,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:00,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:00,089 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:00,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-15 13:09:00,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:09:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:00,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:00,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592208632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:00,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:00,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 20 [2022-02-15 13:09:00,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252019052] [2022-02-15 13:09:00,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:00,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:00,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:00,260 INFO L87 Difference]: Start difference. First operand 2830 states and 8649 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2022-02-15 13:09:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:00,893 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2022-02-15 13:09:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:09:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2022-02-15 13:09:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:00,899 INFO L225 Difference]: With dead ends: 3572 [2022-02-15 13:09:00,899 INFO L226 Difference]: Without dead ends: 3564 [2022-02-15 13:09:00,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:09:00,900 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 188 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:00,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 175 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-02-15 13:09:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2022-02-15 13:09:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.0609756097560976) internal successors, (8785), 2870 states have internal predecessors, (8785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2022-02-15 13:09:00,954 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2022-02-15 13:09:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:00,954 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2022-02-15 13:09:00,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2022-02-15 13:09:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2022-02-15 13:09:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:00,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:00,959 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:00,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:01,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:01,159 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash 608518539, now seen corresponding path program 217 times [2022-02-15 13:09:01,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:01,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423862648] [2022-02-15 13:09:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:01,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:01,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:01,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423862648] [2022-02-15 13:09:01,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423862648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:01,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530936805] [2022-02-15 13:09:01,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:01,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:01,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:01,218 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:01,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-15 13:09:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:01,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:01,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:01,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:01,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530936805] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:01,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:01,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2022-02-15 13:09:01,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480412499] [2022-02-15 13:09:01,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:01,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:01,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:01,382 INFO L87 Difference]: Start difference. First operand 2871 states and 8785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) [2022-02-15 13:09:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:01,956 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2022-02-15 13:09:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:09:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22 [2022-02-15 13:09:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:01,963 INFO L225 Difference]: With dead ends: 3644 [2022-02-15 13:09:01,964 INFO L226 Difference]: Without dead ends: 3632 [2022-02-15 13:09:01,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:09:01,964 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 191 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:01,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 145 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2022-02-15 13:09:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2022-02-15 13:09:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2920 states have (on average 3.0705479452054796) internal successors, (8966), 2920 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2022-02-15 13:09:02,018 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2022-02-15 13:09:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:02,018 INFO L470 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2022-02-15 13:09:02,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) [2022-02-15 13:09:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2022-02-15 13:09:02,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:02,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:02,022 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:02,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:02,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2022-02-15 13:09:02,223 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1615568497, now seen corresponding path program 218 times [2022-02-15 13:09:02,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:02,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787555113] [2022-02-15 13:09:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:02,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:02,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:02,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787555113] [2022-02-15 13:09:02,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787555113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:02,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053185548] [2022-02-15 13:09:02,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:02,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:02,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:02,278 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:02,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-15 13:09:02,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:02,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:02,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053185548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:02,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:02,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-02-15 13:09:02,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991983679] [2022-02-15 13:09:02,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:02,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:09:02,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:02,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:09:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:09:02,444 INFO L87 Difference]: Start difference. First operand 2921 states and 8966 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:09:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:02,979 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2022-02-15 13:09:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:09:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 22 [2022-02-15 13:09:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:02,986 INFO L225 Difference]: With dead ends: 3521 [2022-02-15 13:09:02,986 INFO L226 Difference]: Without dead ends: 3505 [2022-02-15 13:09:02,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:09:02,987 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:02,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 155 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2022-02-15 13:09:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2022-02-15 13:09:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.0701457133175194) internal successors, (9060), 2951 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2022-02-15 13:09:03,038 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2022-02-15 13:09:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:03,038 INFO L470 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2022-02-15 13:09:03,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:09:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2022-02-15 13:09:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:03,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:03,042 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:03,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-15 13:09:03,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:03,243 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -260595641, now seen corresponding path program 219 times [2022-02-15 13:09:03,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:03,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952546911] [2022-02-15 13:09:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:03,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:03,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:03,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952546911] [2022-02-15 13:09:03,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952546911] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:03,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688843840] [2022-02-15 13:09:03,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:03,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:03,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:03,284 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:03,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-15 13:09:03,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:09:03,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:03,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:03,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688843840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:03,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:03,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-02-15 13:09:03,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978080944] [2022-02-15 13:09:03,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:03,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:03,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:03,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:03,449 INFO L87 Difference]: Start difference. First operand 2952 states and 9060 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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) [2022-02-15 13:09:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:03,947 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2022-02-15 13:09:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:09:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 22 [2022-02-15 13:09:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:03,956 INFO L225 Difference]: With dead ends: 4650 [2022-02-15 13:09:03,956 INFO L226 Difference]: Without dead ends: 4641 [2022-02-15 13:09:03,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:09:03,957 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 228 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:03,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 218 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2022-02-15 13:09:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2022-02-15 13:09:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 3.116581777023203) internal successors, (11014), 3534 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2022-02-15 13:09:04,037 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2022-02-15 13:09:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:04,037 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2022-02-15 13:09:04,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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) [2022-02-15 13:09:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2022-02-15 13:09:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:04,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:04,043 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:04,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:04,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-15 13:09:04,255 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash -725186745, now seen corresponding path program 220 times [2022-02-15 13:09:04,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:04,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521196014] [2022-02-15 13:09:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:04,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:04,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:04,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521196014] [2022-02-15 13:09:04,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521196014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:04,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217730189] [2022-02-15 13:09:04,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:04,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:04,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:04,293 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:04,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-15 13:09:04,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:04,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:04,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:04,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217730189] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:04,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:04,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-02-15 13:09:04,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114146509] [2022-02-15 13:09:04,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:04,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:04,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:04,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:04,447 INFO L87 Difference]: Start difference. First operand 3535 states and 11014 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:05,181 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2022-02-15 13:09:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:09:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:05,188 INFO L225 Difference]: With dead ends: 4324 [2022-02-15 13:09:05,188 INFO L226 Difference]: Without dead ends: 4320 [2022-02-15 13:09:05,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 13:09:05,189 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 237 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:05,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 169 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2022-02-15 13:09:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2022-02-15 13:09:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.1048971312662994) internal successors, (10715), 3451 states have internal predecessors, (10715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2022-02-15 13:09:05,255 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2022-02-15 13:09:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:05,255 INFO L470 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2022-02-15 13:09:05,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2022-02-15 13:09:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:05,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:05,259 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:05,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-02-15 13:09:05,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-15 13:09:05,460 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:05,460 INFO L85 PathProgramCache]: Analyzing trace with hash -758785973, now seen corresponding path program 221 times [2022-02-15 13:09:05,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:05,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778331944] [2022-02-15 13:09:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:05,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:05,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:05,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778331944] [2022-02-15 13:09:05,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778331944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:05,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54463881] [2022-02-15 13:09:05,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:05,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:05,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:05,499 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:05,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-15 13:09:05,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:09:05,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:05,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:05,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:05,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54463881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:05,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:05,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 20 [2022-02-15 13:09:05,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708607291] [2022-02-15 13:09:05,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:05,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:05,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:05,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:05,670 INFO L87 Difference]: Start difference. First operand 3452 states and 10715 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:06,337 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2022-02-15 13:09:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:09:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:06,344 INFO L225 Difference]: With dead ends: 4399 [2022-02-15 13:09:06,344 INFO L226 Difference]: Without dead ends: 4391 [2022-02-15 13:09:06,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:09:06,345 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 214 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:06,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 167 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2022-02-15 13:09:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2022-02-15 13:09:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 3.1150042384854477) internal successors, (11024), 3539 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2022-02-15 13:09:06,423 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2022-02-15 13:09:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:06,423 INFO L470 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2022-02-15 13:09:06,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2022-02-15 13:09:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:06,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:06,428 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:06,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:06,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:06,628 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:06,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1800362041, now seen corresponding path program 222 times [2022-02-15 13:09:06,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:06,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511800999] [2022-02-15 13:09:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:06,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:06,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:06,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511800999] [2022-02-15 13:09:06,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511800999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:06,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380003177] [2022-02-15 13:09:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:06,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:06,676 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:06,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-15 13:09:06,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:09:06,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:06,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:06,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:06,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:06,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380003177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:06,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:06,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2022-02-15 13:09:06,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096241234] [2022-02-15 13:09:06,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:06,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:06,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:06,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:06,846 INFO L87 Difference]: Start difference. First operand 3540 states and 11024 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:07,507 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2022-02-15 13:09:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:09:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:07,516 INFO L225 Difference]: With dead ends: 4554 [2022-02-15 13:09:07,516 INFO L226 Difference]: Without dead ends: 4542 [2022-02-15 13:09:07,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:09:07,517 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 223 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:07,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 157 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-02-15 13:09:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2022-02-15 13:09:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 3.129907773386034) internal successors, (11878), 3795 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2022-02-15 13:09:07,592 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2022-02-15 13:09:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:07,592 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2022-02-15 13:09:07,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2022-02-15 13:09:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:07,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:07,598 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:07,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-02-15 13:09:07,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-02-15 13:09:07,799 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 270518219, now seen corresponding path program 223 times [2022-02-15 13:09:07,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:07,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220395669] [2022-02-15 13:09:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:07,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:07,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:07,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220395669] [2022-02-15 13:09:07,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220395669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:07,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130876296] [2022-02-15 13:09:07,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:07,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:07,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:07,852 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:07,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-15 13:09:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:07,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:07,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:07,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:08,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130876296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:08,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:08,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 22 [2022-02-15 13:09:08,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842565520] [2022-02-15 13:09:08,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:08,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:09:08,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:09:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:09:08,019 INFO L87 Difference]: Start difference. First operand 3796 states and 11878 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:08,615 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2022-02-15 13:09:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:09:08,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:08,625 INFO L225 Difference]: With dead ends: 4840 [2022-02-15 13:09:08,625 INFO L226 Difference]: Without dead ends: 4824 [2022-02-15 13:09:08,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:09:08,626 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 218 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:08,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 158 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2022-02-15 13:09:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2022-02-15 13:09:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.143909626719057) internal successors, (12802), 4072 states have internal predecessors, (12802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2022-02-15 13:09:08,706 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2022-02-15 13:09:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:08,706 INFO L470 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2022-02-15 13:09:08,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2022-02-15 13:09:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:08,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:08,713 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:08,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-02-15 13:09:08,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-02-15 13:09:08,913 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:08,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash 43296839, now seen corresponding path program 224 times [2022-02-15 13:09:08,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:08,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569131903] [2022-02-15 13:09:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:08,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:08,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:08,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569131903] [2022-02-15 13:09:08,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569131903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:08,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534906288] [2022-02-15 13:09:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:08,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:08,970 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:08,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-15 13:09:08,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:08,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:09,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534906288] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:09,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:09,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-02-15 13:09:09,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446741966] [2022-02-15 13:09:09,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:09,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:09:09,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:09:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:09:09,173 INFO L87 Difference]: Start difference. First operand 4073 states and 12802 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:09,688 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2022-02-15 13:09:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:09:09,688 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:09,697 INFO L225 Difference]: With dead ends: 4789 [2022-02-15 13:09:09,697 INFO L226 Difference]: Without dead ends: 4769 [2022-02-15 13:09:09,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:09:09,698 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 203 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:09,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 125 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2022-02-15 13:09:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2022-02-15 13:09:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 3.143377885783718) internal successors, (12935), 4115 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2022-02-15 13:09:09,786 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2022-02-15 13:09:09,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:09,786 INFO L470 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2022-02-15 13:09:09,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2022-02-15 13:09:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:09,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:09,793 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:09,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-15 13:09:09,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-02-15 13:09:09,993 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash -750854521, now seen corresponding path program 225 times [2022-02-15 13:09:09,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:09,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006408833] [2022-02-15 13:09:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:09,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:10,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:10,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006408833] [2022-02-15 13:09:10,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006408833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:10,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085621421] [2022-02-15 13:09:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:10,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:10,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:10,048 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:10,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-15 13:09:10,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:10,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:10,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:10,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085621421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:10,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:10,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-02-15 13:09:10,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953499430] [2022-02-15 13:09:10,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:10,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:09:10,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:09:10,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:09:10,174 INFO L87 Difference]: Start difference. First operand 4116 states and 12935 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:10,332 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2022-02-15 13:09:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:09:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:10,342 INFO L225 Difference]: With dead ends: 4973 [2022-02-15 13:09:10,342 INFO L226 Difference]: Without dead ends: 4973 [2022-02-15 13:09:10,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:09:10,343 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:10,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 140 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:10,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2022-02-15 13:09:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2022-02-15 13:09:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 3.1423769507803123) internal successors, (13088), 4165 states have internal predecessors, (13088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2022-02-15 13:09:10,424 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2022-02-15 13:09:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:10,424 INFO L470 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2022-02-15 13:09:10,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2022-02-15 13:09:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:10,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:10,431 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:10,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-15 13:09:10,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:10,632 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash 522079187, now seen corresponding path program 226 times [2022-02-15 13:09:10,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:10,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534563672] [2022-02-15 13:09:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:10,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:10,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:10,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534563672] [2022-02-15 13:09:10,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534563672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:10,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756054117] [2022-02-15 13:09:10,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:10,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:10,685 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:10,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-15 13:09:10,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:10,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:10,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:10,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756054117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:10,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:10,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:10,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067709033] [2022-02-15 13:09:10,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:10,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:10,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:10,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:10,818 INFO L87 Difference]: Start difference. First operand 4166 states and 13088 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:11,039 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2022-02-15 13:09:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:09:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:11,047 INFO L225 Difference]: With dead ends: 4567 [2022-02-15 13:09:11,048 INFO L226 Difference]: Without dead ends: 4567 [2022-02-15 13:09:11,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:09:11,048 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:11,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 119 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2022-02-15 13:09:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2022-02-15 13:09:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 3.141798182687709) internal successors, (13139), 4182 states have internal predecessors, (13139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2022-02-15 13:09:11,122 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2022-02-15 13:09:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:11,122 INFO L470 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2022-02-15 13:09:11,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2022-02-15 13:09:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:11,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:11,129 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:11,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-02-15 13:09:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:11,330 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2082945205, now seen corresponding path program 227 times [2022-02-15 13:09:11,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:11,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725998119] [2022-02-15 13:09:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:11,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:11,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:11,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725998119] [2022-02-15 13:09:11,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725998119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:11,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529042956] [2022-02-15 13:09:11,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:11,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:11,384 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:11,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-15 13:09:11,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:09:11,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:11,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:11,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:11,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529042956] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:11,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:11,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:11,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743765538] [2022-02-15 13:09:11,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:11,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:11,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:11,542 INFO L87 Difference]: Start difference. First operand 4183 states and 13139 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:11,815 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2022-02-15 13:09:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:09:11,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:11,825 INFO L225 Difference]: With dead ends: 4690 [2022-02-15 13:09:11,825 INFO L226 Difference]: Without dead ends: 4690 [2022-02-15 13:09:11,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:09:11,826 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:11,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 103 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2022-02-15 13:09:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2022-02-15 13:09:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 3.141224100976423) internal successors, (13190), 4199 states have internal predecessors, (13190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2022-02-15 13:09:11,907 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2022-02-15 13:09:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:11,907 INFO L470 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2022-02-15 13:09:11,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2022-02-15 13:09:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:11,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:11,914 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:11,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:12,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:12,114 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:12,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:12,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1197146925, now seen corresponding path program 228 times [2022-02-15 13:09:12,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:12,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179869629] [2022-02-15 13:09:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:12,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:12,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:12,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179869629] [2022-02-15 13:09:12,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179869629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:12,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494661898] [2022-02-15 13:09:12,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:12,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:12,168 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:12,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-15 13:09:12,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:09:12,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:12,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:12,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494661898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:12,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:12,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:12,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681564283] [2022-02-15 13:09:12,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:12,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:12,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:12,314 INFO L87 Difference]: Start difference. First operand 4200 states and 13190 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:12,737 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2022-02-15 13:09:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:09:12,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:12,747 INFO L225 Difference]: With dead ends: 4708 [2022-02-15 13:09:12,747 INFO L226 Difference]: Without dead ends: 4708 [2022-02-15 13:09:12,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:09:12,747 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:12,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 139 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2022-02-15 13:09:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2022-02-15 13:09:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.1397163120567377) internal successors, (13281), 4230 states have internal predecessors, (13281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2022-02-15 13:09:12,828 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2022-02-15 13:09:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:12,828 INFO L470 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2022-02-15 13:09:12,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2022-02-15 13:09:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:12,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:12,835 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:12,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-02-15 13:09:13,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:13,035 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 909637195, now seen corresponding path program 229 times [2022-02-15 13:09:13,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:13,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90774720] [2022-02-15 13:09:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:13,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:13,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:13,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90774720] [2022-02-15 13:09:13,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90774720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:13,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698813282] [2022-02-15 13:09:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:13,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:13,089 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:13,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-15 13:09:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:13,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:13,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698813282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:13,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:13,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:13,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601748126] [2022-02-15 13:09:13,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:13,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:13,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:13,223 INFO L87 Difference]: Start difference. First operand 4231 states and 13281 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:13,753 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2022-02-15 13:09:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:09:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:13,763 INFO L225 Difference]: With dead ends: 4892 [2022-02-15 13:09:13,763 INFO L226 Difference]: Without dead ends: 4892 [2022-02-15 13:09:13,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:09:13,764 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 132 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:13,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 212 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2022-02-15 13:09:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2022-02-15 13:09:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 3.140959925442684) internal successors, (13481), 4292 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2022-02-15 13:09:13,857 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2022-02-15 13:09:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:13,857 INFO L470 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2022-02-15 13:09:13,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2022-02-15 13:09:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:13,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:13,864 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:13,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-02-15 13:09:14,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:14,065 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1239159341, now seen corresponding path program 230 times [2022-02-15 13:09:14,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:14,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146473706] [2022-02-15 13:09:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:14,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:14,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:14,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146473706] [2022-02-15 13:09:14,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146473706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:14,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693237898] [2022-02-15 13:09:14,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:14,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:14,118 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:14,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-15 13:09:14,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:14,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:14,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693237898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:14,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:14,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:14,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275592974] [2022-02-15 13:09:14,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:14,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:14,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:14,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:14,249 INFO L87 Difference]: Start difference. First operand 4293 states and 13481 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:14,805 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2022-02-15 13:09:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:09:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:14,814 INFO L225 Difference]: With dead ends: 5068 [2022-02-15 13:09:14,814 INFO L226 Difference]: Without dead ends: 5068 [2022-02-15 13:09:14,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:09:14,815 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 181 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:14,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 221 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2022-02-15 13:09:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2022-02-15 13:09:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.1475409836065573) internal successors, (13440), 4270 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2022-02-15 13:09:14,914 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2022-02-15 13:09:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:14,914 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2022-02-15 13:09:14,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2022-02-15 13:09:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:14,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:14,920 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:14,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:15,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:15,120 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -667704535, now seen corresponding path program 231 times [2022-02-15 13:09:15,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:15,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065839452] [2022-02-15 13:09:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:15,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:15,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:15,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065839452] [2022-02-15 13:09:15,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065839452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:15,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805640402] [2022-02-15 13:09:15,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:15,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:15,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:15,172 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:15,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-15 13:09:15,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:09:15,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:15,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:15,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:15,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805640402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:15,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:15,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:15,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700359438] [2022-02-15 13:09:15,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:15,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:15,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:15,305 INFO L87 Difference]: Start difference. First operand 4271 states and 13440 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:15,849 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2022-02-15 13:09:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:09:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:15,858 INFO L225 Difference]: With dead ends: 4740 [2022-02-15 13:09:15,858 INFO L226 Difference]: Without dead ends: 4734 [2022-02-15 13:09:15,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:09:15,859 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:15,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 181 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2022-02-15 13:09:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2022-02-15 13:09:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 3.137542829172785) internal successors, (12820), 4086 states have internal predecessors, (12820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2022-02-15 13:09:15,925 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2022-02-15 13:09:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:15,925 INFO L470 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2022-02-15 13:09:15,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2022-02-15 13:09:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:15,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:15,931 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:15,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-15 13:09:16,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-02-15 13:09:16,132 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1695691215, now seen corresponding path program 232 times [2022-02-15 13:09:16,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:16,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035682473] [2022-02-15 13:09:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:16,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:16,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:16,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035682473] [2022-02-15 13:09:16,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035682473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:16,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665003379] [2022-02-15 13:09:16,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:16,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:16,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:16,184 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:16,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-15 13:09:16,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:16,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:16,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:16,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665003379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:16,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:16,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:16,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58888206] [2022-02-15 13:09:16,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:16,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:16,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:16,332 INFO L87 Difference]: Start difference. First operand 4087 states and 12820 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:16,799 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2022-02-15 13:09:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:09:16,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:16,810 INFO L225 Difference]: With dead ends: 5641 [2022-02-15 13:09:16,810 INFO L226 Difference]: Without dead ends: 5629 [2022-02-15 13:09:16,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:09:16,810 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 290 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:16,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 150 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:16,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2022-02-15 13:09:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2022-02-15 13:09:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 3.1621224832214767) internal successors, (15077), 4768 states have internal predecessors, (15077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2022-02-15 13:09:16,906 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2022-02-15 13:09:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:16,906 INFO L470 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2022-02-15 13:09:16,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2022-02-15 13:09:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:16,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:16,913 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:16,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-02-15 13:09:17,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-15 13:09:17,128 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1231100111, now seen corresponding path program 233 times [2022-02-15 13:09:17,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:17,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625619025] [2022-02-15 13:09:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:17,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:17,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:17,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625619025] [2022-02-15 13:09:17,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625619025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:17,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449155322] [2022-02-15 13:09:17,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:17,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:17,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:17,179 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:17,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-15 13:09:17,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:09:17,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:17,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:17,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:17,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:17,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449155322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:17,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:17,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:17,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656963882] [2022-02-15 13:09:17,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:17,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:17,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:17,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:17,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:17,314 INFO L87 Difference]: Start difference. First operand 4769 states and 15077 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:17,790 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2022-02-15 13:09:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:09:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:17,799 INFO L225 Difference]: With dead ends: 5550 [2022-02-15 13:09:17,799 INFO L226 Difference]: Without dead ends: 5546 [2022-02-15 13:09:17,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:09:17,800 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:17,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 130 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2022-02-15 13:09:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2022-02-15 13:09:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.1385701676963813) internal successors, (14224), 4532 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2022-02-15 13:09:17,903 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2022-02-15 13:09:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:17,903 INFO L470 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2022-02-15 13:09:17,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2022-02-15 13:09:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:17,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:17,909 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:17,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-02-15 13:09:18,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-02-15 13:09:18,109 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1197500883, now seen corresponding path program 234 times [2022-02-15 13:09:18,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:18,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155143276] [2022-02-15 13:09:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:18,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:18,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:18,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155143276] [2022-02-15 13:09:18,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155143276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:18,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128595075] [2022-02-15 13:09:18,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:18,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:18,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:18,169 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:18,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-15 13:09:18,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:09:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:18,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:18,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128595075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:18,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:18,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:18,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451566837] [2022-02-15 13:09:18,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:18,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:18,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:18,303 INFO L87 Difference]: Start difference. First operand 4533 states and 14224 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:18,743 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2022-02-15 13:09:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:09:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:18,752 INFO L225 Difference]: With dead ends: 5471 [2022-02-15 13:09:18,752 INFO L226 Difference]: Without dead ends: 5463 [2022-02-15 13:09:18,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:09:18,753 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 213 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:18,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 138 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2022-02-15 13:09:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2022-02-15 13:09:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.1386861313868613) internal successors, (14620), 4658 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2022-02-15 13:09:18,829 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2022-02-15 13:09:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:18,830 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2022-02-15 13:09:18,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2022-02-15 13:09:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:18,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:18,836 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:18,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-02-15 13:09:19,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:19,037 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash 155924815, now seen corresponding path program 235 times [2022-02-15 13:09:19,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:19,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737205481] [2022-02-15 13:09:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:19,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:19,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:19,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737205481] [2022-02-15 13:09:19,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737205481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:19,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567356126] [2022-02-15 13:09:19,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:19,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:19,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:19,087 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:19,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-15 13:09:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:19,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:19,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:19,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567356126] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:19,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:19,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:19,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492219748] [2022-02-15 13:09:19,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:19,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:19,221 INFO L87 Difference]: Start difference. First operand 4659 states and 14620 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:19,603 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2022-02-15 13:09:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:09:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:19,613 INFO L225 Difference]: With dead ends: 5651 [2022-02-15 13:09:19,613 INFO L226 Difference]: Without dead ends: 5639 [2022-02-15 13:09:19,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:09:19,614 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 300 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:19,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 103 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2022-02-15 13:09:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2022-02-15 13:09:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.134668071654373) internal successors, (14874), 4745 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2022-02-15 13:09:19,701 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2022-02-15 13:09:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:19,701 INFO L470 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2022-02-15 13:09:19,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2022-02-15 13:09:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:19,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:19,708 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:19,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-02-15 13:09:19,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:19,908 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2068162221, now seen corresponding path program 236 times [2022-02-15 13:09:19,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:19,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943583992] [2022-02-15 13:09:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:19,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:19,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:19,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943583992] [2022-02-15 13:09:19,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943583992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:19,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95942689] [2022-02-15 13:09:19,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:19,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:19,960 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:19,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-15 13:09:19,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:19,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:19,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:20,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:20,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95942689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:20,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:20,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:20,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578364189] [2022-02-15 13:09:20,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:20,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:20,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:20,096 INFO L87 Difference]: Start difference. First operand 4746 states and 14874 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:20,447 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2022-02-15 13:09:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:09:20,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:20,457 INFO L225 Difference]: With dead ends: 5785 [2022-02-15 13:09:20,457 INFO L226 Difference]: Without dead ends: 5769 [2022-02-15 13:09:20,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:09:20,457 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 213 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:20,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 118 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2022-02-15 13:09:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2022-02-15 13:09:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.131064902331443) internal successors, (14907), 4761 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2022-02-15 13:09:20,537 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2022-02-15 13:09:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:20,537 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2022-02-15 13:09:20,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2022-02-15 13:09:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:20,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:20,544 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:20,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-02-15 13:09:20,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:20,745 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1999583695, now seen corresponding path program 237 times [2022-02-15 13:09:20,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:20,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040146246] [2022-02-15 13:09:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:20,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:20,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:20,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040146246] [2022-02-15 13:09:20,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040146246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:20,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878018633] [2022-02-15 13:09:20,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:20,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:20,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:20,811 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:20,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-15 13:09:20,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:20,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:20,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:20,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:20,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878018633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:20,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:20,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-02-15 13:09:20,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730047910] [2022-02-15 13:09:20,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:20,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:20,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:20,950 INFO L87 Difference]: Start difference. First operand 4762 states and 14907 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:21,243 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2022-02-15 13:09:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:09:21,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:21,251 INFO L225 Difference]: With dead ends: 5323 [2022-02-15 13:09:21,251 INFO L226 Difference]: Without dead ends: 5313 [2022-02-15 13:09:21,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 13:09:21,251 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:21,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 89 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2022-02-15 13:09:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2022-02-15 13:09:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1300147027935306) internal successors, (14902), 4761 states have internal predecessors, (14902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2022-02-15 13:09:21,319 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2022-02-15 13:09:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:21,319 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2022-02-15 13:09:21,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2022-02-15 13:09:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:21,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:21,326 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:21,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-02-15 13:09:21,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:21,526 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2018594477, now seen corresponding path program 238 times [2022-02-15 13:09:21,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:21,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143176200] [2022-02-15 13:09:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:21,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:21,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:21,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143176200] [2022-02-15 13:09:21,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143176200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:21,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131368490] [2022-02-15 13:09:21,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:21,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:21,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:21,581 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:21,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-15 13:09:21,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:21,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:21,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:21,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131368490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:21,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:21,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-02-15 13:09:21,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581286098] [2022-02-15 13:09:21,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:21,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 13:09:21,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:21,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 13:09:21,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:09:21,706 INFO L87 Difference]: Start difference. First operand 4762 states and 14902 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:21,831 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2022-02-15 13:09:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:09:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:21,840 INFO L225 Difference]: With dead ends: 5170 [2022-02-15 13:09:21,840 INFO L226 Difference]: Without dead ends: 5158 [2022-02-15 13:09:21,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:09:21,840 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:21,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 84 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2022-02-15 13:09:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2022-02-15 13:09:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1298046628859484) internal successors, (14901), 4761 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2022-02-15 13:09:21,911 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2022-02-15 13:09:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:21,911 INFO L470 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2022-02-15 13:09:21,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2022-02-15 13:09:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:21,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:21,918 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:21,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-02-15 13:09:22,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:22,118 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:22,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:22,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1328318471, now seen corresponding path program 239 times [2022-02-15 13:09:22,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:22,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862204117] [2022-02-15 13:09:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:22,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:22,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:22,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862204117] [2022-02-15 13:09:22,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862204117] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:22,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073853781] [2022-02-15 13:09:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:22,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:22,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:22,171 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:22,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-15 13:09:22,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:09:22,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:22,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:22,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:22,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073853781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:22,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:22,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-02-15 13:09:22,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131058638] [2022-02-15 13:09:22,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:22,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:22,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:22,309 INFO L87 Difference]: Start difference. First operand 4762 states and 14901 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:22,715 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2022-02-15 13:09:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:09:22,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:22,723 INFO L225 Difference]: With dead ends: 5204 [2022-02-15 13:09:22,723 INFO L226 Difference]: Without dead ends: 5204 [2022-02-15 13:09:22,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:09:22,724 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:22,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 111 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2022-02-15 13:09:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2022-02-15 13:09:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.129396984924623) internal successors, (14946), 4776 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2022-02-15 13:09:22,799 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2022-02-15 13:09:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:22,799 INFO L470 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2022-02-15 13:09:22,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2022-02-15 13:09:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:22,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:22,806 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:22,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-02-15 13:09:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:23,007 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:23,007 INFO L85 PathProgramCache]: Analyzing trace with hash -428083449, now seen corresponding path program 240 times [2022-02-15 13:09:23,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:23,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79907110] [2022-02-15 13:09:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:23,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:23,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:23,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79907110] [2022-02-15 13:09:23,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79907110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:23,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340553551] [2022-02-15 13:09:23,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:23,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:23,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:23,053 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:23,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-15 13:09:23,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:09:23,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:23,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:23,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340553551] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:23,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:23,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-02-15 13:09:23,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565542261] [2022-02-15 13:09:23,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:23,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:23,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:23,190 INFO L87 Difference]: Start difference. First operand 4777 states and 14946 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:23,539 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2022-02-15 13:09:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 13:09:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:23,549 INFO L225 Difference]: With dead ends: 5391 [2022-02-15 13:09:23,549 INFO L226 Difference]: Without dead ends: 5381 [2022-02-15 13:09:23,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:09:23,549 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 83 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:23,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 132 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-02-15 13:09:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2022-02-15 13:09:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 3.128413591828226) internal successors, (15007), 4797 states have internal predecessors, (15007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2022-02-15 13:09:23,624 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2022-02-15 13:09:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:23,624 INFO L470 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2022-02-15 13:09:23,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2022-02-15 13:09:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:23,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:23,631 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:23,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:23,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:23,831 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2147309561, now seen corresponding path program 241 times [2022-02-15 13:09:23,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:23,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059153899] [2022-02-15 13:09:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:23,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:23,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:23,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059153899] [2022-02-15 13:09:23,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059153899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:23,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004334572] [2022-02-15 13:09:23,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:23,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:23,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:23,877 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:23,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-15 13:09:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:23,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:23,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:24,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004334572] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:24,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:24,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-02-15 13:09:24,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391582182] [2022-02-15 13:09:24,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:24,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:24,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:24,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:24,029 INFO L87 Difference]: Start difference. First operand 4798 states and 15007 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:24,374 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2022-02-15 13:09:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:09:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:24,383 INFO L225 Difference]: With dead ends: 5359 [2022-02-15 13:09:24,383 INFO L226 Difference]: Without dead ends: 5349 [2022-02-15 13:09:24,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:09:24,384 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:24,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 100 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-02-15 13:09:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2022-02-15 13:09:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 3.1258828417116744) internal successors, (15048), 4814 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2022-02-15 13:09:24,468 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2022-02-15 13:09:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:24,468 INFO L470 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2022-02-15 13:09:24,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2022-02-15 13:09:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:24,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:24,475 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:24,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-02-15 13:09:24,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-02-15 13:09:24,679 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash 845272839, now seen corresponding path program 242 times [2022-02-15 13:09:24,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:24,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549395561] [2022-02-15 13:09:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:24,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:24,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:24,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549395561] [2022-02-15 13:09:24,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549395561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:24,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893169667] [2022-02-15 13:09:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:24,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:24,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:24,734 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:24,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-15 13:09:24,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:24,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:24,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:24,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893169667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:24,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:24,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-02-15 13:09:24,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328338577] [2022-02-15 13:09:24,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:24,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:24,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:24,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:24,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:24,870 INFO L87 Difference]: Start difference. First operand 4815 states and 15048 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:25,353 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2022-02-15 13:09:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:09:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:25,364 INFO L225 Difference]: With dead ends: 5632 [2022-02-15 13:09:25,364 INFO L226 Difference]: Without dead ends: 5628 [2022-02-15 13:09:25,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:09:25,364 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:25,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 160 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2022-02-15 13:09:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2022-02-15 13:09:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 3.1237562189054726) internal successors, (15069), 4824 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2022-02-15 13:09:25,442 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2022-02-15 13:09:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:25,442 INFO L470 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2022-02-15 13:09:25,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2022-02-15 13:09:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:25,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:25,449 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:25,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-02-15 13:09:25,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-02-15 13:09:25,665 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash 803260423, now seen corresponding path program 243 times [2022-02-15 13:09:25,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:25,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496400022] [2022-02-15 13:09:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:25,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:25,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:25,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496400022] [2022-02-15 13:09:25,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496400022] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:25,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854862036] [2022-02-15 13:09:25,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:25,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:25,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:25,713 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:25,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-15 13:09:25,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:09:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:25,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:25,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:25,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854862036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:25,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:25,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-02-15 13:09:25,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421223544] [2022-02-15 13:09:25,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:25,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:25,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:25,850 INFO L87 Difference]: Start difference. First operand 4825 states and 15069 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:26,385 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2022-02-15 13:09:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:09:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:26,397 INFO L225 Difference]: With dead ends: 5908 [2022-02-15 13:09:26,397 INFO L226 Difference]: Without dead ends: 5908 [2022-02-15 13:09:26,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:09:26,398 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:26,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 199 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2022-02-15 13:09:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2022-02-15 13:09:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 3.1329776318489637) internal successors, (15267), 4873 states have internal predecessors, (15267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2022-02-15 13:09:26,486 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2022-02-15 13:09:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:26,486 INFO L470 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2022-02-15 13:09:26,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2022-02-15 13:09:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:26,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:26,493 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:26,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:26,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-15 13:09:26,694 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:26,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1374715229, now seen corresponding path program 244 times [2022-02-15 13:09:26,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:26,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620911069] [2022-02-15 13:09:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:26,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:26,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:26,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620911069] [2022-02-15 13:09:26,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620911069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:26,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117643097] [2022-02-15 13:09:26,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:26,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:26,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:26,740 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:26,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-15 13:09:26,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:26,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:26,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:26,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117643097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:26,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:26,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 19 [2022-02-15 13:09:26,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468286120] [2022-02-15 13:09:26,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:26,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:26,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:26,876 INFO L87 Difference]: Start difference. First operand 4874 states and 15267 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:27,508 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2022-02-15 13:09:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:09:27,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:27,517 INFO L225 Difference]: With dead ends: 5619 [2022-02-15 13:09:27,517 INFO L226 Difference]: Without dead ends: 5607 [2022-02-15 13:09:27,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:09:27,518 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:27,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 247 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2022-02-15 13:09:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2022-02-15 13:09:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 3.120291095890411) internal successors, (14578), 4672 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2022-02-15 13:09:27,594 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2022-02-15 13:09:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:27,594 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2022-02-15 13:09:27,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2022-02-15 13:09:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:27,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:27,601 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:27,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-02-15 13:09:27,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:27,801 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1909945031, now seen corresponding path program 245 times [2022-02-15 13:09:27,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:27,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991141141] [2022-02-15 13:09:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:27,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:27,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:27,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991141141] [2022-02-15 13:09:27,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991141141] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:27,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787526950] [2022-02-15 13:09:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:27,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:27,867 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-15 13:09:27,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:09:27,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:27,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:27,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:28,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787526950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:28,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:28,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-02-15 13:09:28,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999270698] [2022-02-15 13:09:28,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:28,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:28,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:28,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:28,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:28,005 INFO L87 Difference]: Start difference. First operand 4673 states and 14578 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:28,564 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2022-02-15 13:09:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:09:28,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:28,572 INFO L225 Difference]: With dead ends: 5350 [2022-02-15 13:09:28,572 INFO L226 Difference]: Without dead ends: 5338 [2022-02-15 13:09:28,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:09:28,573 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 140 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:28,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 208 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2022-02-15 13:09:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2022-02-15 13:09:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 3.1207996597192684) internal successors, (14674), 4702 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2022-02-15 13:09:28,651 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2022-02-15 13:09:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:28,651 INFO L470 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2022-02-15 13:09:28,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2022-02-15 13:09:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:28,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:28,657 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:28,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-02-15 13:09:28,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-02-15 13:09:28,858 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash 551932499, now seen corresponding path program 246 times [2022-02-15 13:09:28,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:28,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244650149] [2022-02-15 13:09:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:28,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:28,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:28,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244650149] [2022-02-15 13:09:28,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244650149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:28,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538542575] [2022-02-15 13:09:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:28,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:28,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:28,910 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:28,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-15 13:09:28,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:09:28,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:29,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:29,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538542575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:29,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:29,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-02-15 13:09:29,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210457054] [2022-02-15 13:09:29,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:29,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:29,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:29,061 INFO L87 Difference]: Start difference. First operand 4703 states and 14674 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:29,503 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2022-02-15 13:09:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:09:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:29,512 INFO L225 Difference]: With dead ends: 5100 [2022-02-15 13:09:29,512 INFO L226 Difference]: Without dead ends: 5100 [2022-02-15 13:09:29,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:09:29,513 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:29,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 125 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2022-02-15 13:09:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2022-02-15 13:09:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.120998719590269) internal successors, (14625), 4686 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2022-02-15 13:09:29,584 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2022-02-15 13:09:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:29,585 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2022-02-15 13:09:29,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2022-02-15 13:09:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:29,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:29,591 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:29,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:29,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-02-15 13:09:29,792 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash -666976565, now seen corresponding path program 247 times [2022-02-15 13:09:29,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:29,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393534382] [2022-02-15 13:09:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:29,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:29,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:29,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393534382] [2022-02-15 13:09:29,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393534382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:29,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313968202] [2022-02-15 13:09:29,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:29,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:29,852 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:29,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-15 13:09:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:29,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:30,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313968202] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:30,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:30,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 20 [2022-02-15 13:09:30,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103509537] [2022-02-15 13:09:30,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:30,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:30,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:30,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:30,001 INFO L87 Difference]: Start difference. First operand 4687 states and 14625 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:30,407 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2022-02-15 13:09:30,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:09:30,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:30,416 INFO L225 Difference]: With dead ends: 5184 [2022-02-15 13:09:30,417 INFO L226 Difference]: Without dead ends: 5174 [2022-02-15 13:09:30,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:09:30,417 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 107 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:30,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 128 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2022-02-15 13:09:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2022-02-15 13:09:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 3.1195559350982065) internal successors, (14612), 4684 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2022-02-15 13:09:30,493 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2022-02-15 13:09:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:30,494 INFO L470 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2022-02-15 13:09:30,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2022-02-15 13:09:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:30,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:30,500 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:30,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:30,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-02-15 13:09:30,701 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1537580205, now seen corresponding path program 248 times [2022-02-15 13:09:30,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:30,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43598543] [2022-02-15 13:09:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:30,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:30,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:30,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43598543] [2022-02-15 13:09:30,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43598543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:30,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423825358] [2022-02-15 13:09:30,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:30,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:30,750 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:30,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-15 13:09:30,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:30,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:30,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:30,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:30,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423825358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:30,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:30,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-02-15 13:09:30,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953680164] [2022-02-15 13:09:30,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:30,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:30,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:30,904 INFO L87 Difference]: Start difference. First operand 4685 states and 14612 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:31,299 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2022-02-15 13:09:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:09:31,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:31,308 INFO L225 Difference]: With dead ends: 5658 [2022-02-15 13:09:31,308 INFO L226 Difference]: Without dead ends: 5652 [2022-02-15 13:09:31,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:09:31,309 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:31,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 98 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2022-02-15 13:09:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2022-02-15 13:09:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 3.117512479201331) internal successors, (14989), 4808 states have internal predecessors, (14989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2022-02-15 13:09:31,383 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2022-02-15 13:09:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:31,383 INFO L470 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2022-02-15 13:09:31,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2022-02-15 13:09:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:31,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:31,389 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:31,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-02-15 13:09:31,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:31,590 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1150022197, now seen corresponding path program 249 times [2022-02-15 13:09:31,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:31,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946079746] [2022-02-15 13:09:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:31,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:31,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:31,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946079746] [2022-02-15 13:09:31,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946079746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:31,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055501733] [2022-02-15 13:09:31,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:31,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:31,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:31,632 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:31,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-15 13:09:31,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:31,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:31,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:31,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055501733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:31,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:31,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-02-15 13:09:31,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041728865] [2022-02-15 13:09:31,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:31,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:31,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:31,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:31,803 INFO L87 Difference]: Start difference. First operand 4809 states and 14989 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:32,237 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2022-02-15 13:09:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:09:32,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:32,247 INFO L225 Difference]: With dead ends: 5753 [2022-02-15 13:09:32,247 INFO L226 Difference]: Without dead ends: 5749 [2022-02-15 13:09:32,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:09:32,247 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 156 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:32,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 182 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2022-02-15 13:09:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2022-02-15 13:09:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.117513424204874) internal successors, (15095), 4842 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2022-02-15 13:09:32,329 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2022-02-15 13:09:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:32,329 INFO L470 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2022-02-15 13:09:32,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2022-02-15 13:09:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:32,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:32,335 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:32,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:32,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:32,536 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash -306236333, now seen corresponding path program 250 times [2022-02-15 13:09:32,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:32,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897106212] [2022-02-15 13:09:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:32,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:32,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:32,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897106212] [2022-02-15 13:09:32,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897106212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:32,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034306720] [2022-02-15 13:09:32,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:32,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:32,579 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:32,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-15 13:09:32,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:32,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:32,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:32,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:32,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034306720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:32,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:32,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-02-15 13:09:32,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097036153] [2022-02-15 13:09:32,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:32,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:32,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:32,719 INFO L87 Difference]: Start difference. First operand 4843 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:33,204 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2022-02-15 13:09:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:09:33,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:33,215 INFO L225 Difference]: With dead ends: 6063 [2022-02-15 13:09:33,215 INFO L226 Difference]: Without dead ends: 6063 [2022-02-15 13:09:33,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:09:33,216 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 219 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:33,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 182 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2022-02-15 13:09:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2022-02-15 13:09:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 3.125948717948718) internal successors, (15239), 4875 states have internal predecessors, (15239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2022-02-15 13:09:33,313 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2022-02-15 13:09:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:33,314 INFO L470 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2022-02-15 13:09:33,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2022-02-15 13:09:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:33,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:33,322 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:33,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-02-15 13:09:33,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:33,522 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:33,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash 265218473, now seen corresponding path program 251 times [2022-02-15 13:09:33,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:33,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545229140] [2022-02-15 13:09:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:33,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:33,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:33,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545229140] [2022-02-15 13:09:33,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545229140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:33,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046393478] [2022-02-15 13:09:33,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:33,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:33,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:33,565 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:33,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-15 13:09:33,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:09:33,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:33,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:33,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046393478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:33,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:33,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 19 [2022-02-15 13:09:33,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243767071] [2022-02-15 13:09:33,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:33,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:33,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:33,722 INFO L87 Difference]: Start difference. First operand 4876 states and 15239 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:34,330 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2022-02-15 13:09:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:09:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:34,339 INFO L225 Difference]: With dead ends: 5817 [2022-02-15 13:09:34,339 INFO L226 Difference]: Without dead ends: 5808 [2022-02-15 13:09:34,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:09:34,340 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 173 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:34,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 191 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2022-02-15 13:09:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2022-02-15 13:09:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.1192163401417257) internal successors, (14966), 4798 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2022-02-15 13:09:34,420 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2022-02-15 13:09:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:34,420 INFO L470 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2022-02-15 13:09:34,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2022-02-15 13:09:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:34,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:34,426 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:34,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-02-15 13:09:34,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:34,627 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:34,627 INFO L85 PathProgramCache]: Analyzing trace with hash 800448275, now seen corresponding path program 252 times [2022-02-15 13:09:34,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:34,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932258394] [2022-02-15 13:09:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:34,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:34,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:34,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932258394] [2022-02-15 13:09:34,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932258394] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:34,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798640937] [2022-02-15 13:09:34,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:34,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:34,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:34,677 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:34,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-15 13:09:34,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:09:34,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:34,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:34,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:34,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:34,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798640937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:34,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:34,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 20 [2022-02-15 13:09:34,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342685256] [2022-02-15 13:09:34,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:34,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:34,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:34,822 INFO L87 Difference]: Start difference. First operand 4799 states and 14966 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:35,443 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2022-02-15 13:09:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:09:35,443 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:35,451 INFO L225 Difference]: With dead ends: 5773 [2022-02-15 13:09:35,451 INFO L226 Difference]: Without dead ends: 5755 [2022-02-15 13:09:35,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:09:35,452 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 167 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:35,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 216 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-02-15 13:09:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2022-02-15 13:09:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 3.11897174421075) internal successors, (14681), 4707 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2022-02-15 13:09:35,561 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2022-02-15 13:09:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:35,561 INFO L470 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2022-02-15 13:09:35,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2022-02-15 13:09:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:35,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:35,568 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:35,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-02-15 13:09:35,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-15 13:09:35,768 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash 212702953, now seen corresponding path program 253 times [2022-02-15 13:09:35,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:35,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125354827] [2022-02-15 13:09:35,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:35,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:35,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:35,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125354827] [2022-02-15 13:09:35,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125354827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:35,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603728468] [2022-02-15 13:09:35,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:35,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:35,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:35,820 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:35,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-15 13:09:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:35,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:35,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603728468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:35,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:35,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-02-15 13:09:35,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096217785] [2022-02-15 13:09:35,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:35,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:35,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:35,971 INFO L87 Difference]: Start difference. First operand 4708 states and 14681 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:36,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:36,510 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2022-02-15 13:09:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:09:36,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:36,518 INFO L225 Difference]: With dead ends: 5582 [2022-02-15 13:09:36,518 INFO L226 Difference]: Without dead ends: 5564 [2022-02-15 13:09:36,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:09:36,519 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:36,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 181 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2022-02-15 13:09:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2022-02-15 13:09:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 3.119737677173683) internal successors, (14747), 4727 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2022-02-15 13:09:36,594 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2022-02-15 13:09:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:36,594 INFO L470 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2022-02-15 13:09:36,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2022-02-15 13:09:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:36,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:36,601 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:36,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:36,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:36,817 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:36,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2041196153, now seen corresponding path program 254 times [2022-02-15 13:09:36,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:36,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964619463] [2022-02-15 13:09:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:36,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:36,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:36,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964619463] [2022-02-15 13:09:36,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964619463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:36,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778335939] [2022-02-15 13:09:36,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:36,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:36,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:36,870 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:36,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-15 13:09:36,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:36,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:36,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:36,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:37,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778335939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:37,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:37,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-02-15 13:09:37,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496223355] [2022-02-15 13:09:37,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:37,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:09:37,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:09:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:09:37,029 INFO L87 Difference]: Start difference. First operand 4728 states and 14747 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:37,504 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2022-02-15 13:09:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:09:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:37,512 INFO L225 Difference]: With dead ends: 5063 [2022-02-15 13:09:37,513 INFO L226 Difference]: Without dead ends: 5063 [2022-02-15 13:09:37,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:09:37,513 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:37,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 124 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2022-02-15 13:09:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2022-02-15 13:09:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.118311660626732) internal successors, (14628), 4691 states have internal predecessors, (14628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2022-02-15 13:09:37,597 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2022-02-15 13:09:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:37,597 INFO L470 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2022-02-15 13:09:37,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2022-02-15 13:09:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:37,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:37,603 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:37,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-02-15 13:09:37,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-02-15 13:09:37,804 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash 517271431, now seen corresponding path program 255 times [2022-02-15 13:09:37,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:37,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269774716] [2022-02-15 13:09:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:37,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:37,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:37,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269774716] [2022-02-15 13:09:37,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269774716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:37,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28041954] [2022-02-15 13:09:37,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:37,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:37,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:37,850 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:37,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-15 13:09:37,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:09:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:37,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:38,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28041954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:38,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:38,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2022-02-15 13:09:38,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379047727] [2022-02-15 13:09:38,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:38,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:38,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:38,008 INFO L87 Difference]: Start difference. First operand 4692 states and 14628 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:38,457 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2022-02-15 13:09:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:09:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:38,466 INFO L225 Difference]: With dead ends: 5220 [2022-02-15 13:09:38,466 INFO L226 Difference]: Without dead ends: 5210 [2022-02-15 13:09:38,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:09:38,467 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:38,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 151 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2022-02-15 13:09:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2022-02-15 13:09:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4588 states have (on average 3.1200959023539667) internal successors, (14315), 4588 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2022-02-15 13:09:38,536 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2022-02-15 13:09:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:38,536 INFO L470 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2022-02-15 13:09:38,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2022-02-15 13:09:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:38,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:38,542 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:38,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:38,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-15 13:09:38,743 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 184160647, now seen corresponding path program 256 times [2022-02-15 13:09:38,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:38,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817009023] [2022-02-15 13:09:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:38,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:38,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:38,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817009023] [2022-02-15 13:09:38,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817009023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:38,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333277597] [2022-02-15 13:09:38,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:38,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:38,784 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:38,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-15 13:09:38,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:38,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:38,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:38,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333277597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:38,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:38,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 20 [2022-02-15 13:09:38,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921472961] [2022-02-15 13:09:38,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:38,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:38,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:38,933 INFO L87 Difference]: Start difference. First operand 4589 states and 14315 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:39,368 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2022-02-15 13:09:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:09:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:39,378 INFO L225 Difference]: With dead ends: 5724 [2022-02-15 13:09:39,378 INFO L226 Difference]: Without dead ends: 5718 [2022-02-15 13:09:39,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:09:39,379 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 163 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:39,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 231 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2022-02-15 13:09:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2022-02-15 13:09:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 3.118923611111111) internal successors, (14372), 4608 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2022-02-15 13:09:39,470 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2022-02-15 13:09:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:39,470 INFO L470 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2022-02-15 13:09:39,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2022-02-15 13:09:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:39,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:39,476 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:39,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:39,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-02-15 13:09:39,677 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1420341127, now seen corresponding path program 257 times [2022-02-15 13:09:39,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:39,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584952093] [2022-02-15 13:09:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:39,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:39,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:39,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584952093] [2022-02-15 13:09:39,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584952093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:39,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763388102] [2022-02-15 13:09:39,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:39,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:39,715 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:39,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-15 13:09:39,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:09:39,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:39,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:39,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:39,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:39,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763388102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:39,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:39,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-02-15 13:09:39,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255869593] [2022-02-15 13:09:39,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:39,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:39,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:39,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:39,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:39,861 INFO L87 Difference]: Start difference. First operand 4609 states and 14372 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:40,293 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2022-02-15 13:09:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:09:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:40,304 INFO L225 Difference]: With dead ends: 6302 [2022-02-15 13:09:40,304 INFO L226 Difference]: Without dead ends: 6300 [2022-02-15 13:09:40,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:09:40,305 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:40,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 210 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2022-02-15 13:09:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2022-02-15 13:09:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.1176590538336053) internal successors, (15289), 4904 states have internal predecessors, (15289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2022-02-15 13:09:40,388 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2022-02-15 13:09:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:40,388 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2022-02-15 13:09:40,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2022-02-15 13:09:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:40,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:40,395 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:40,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-02-15 13:09:40,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-02-15 13:09:40,595 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash -340897401, now seen corresponding path program 258 times [2022-02-15 13:09:40,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:40,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934245510] [2022-02-15 13:09:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:40,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:40,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:40,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934245510] [2022-02-15 13:09:40,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934245510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:40,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962459607] [2022-02-15 13:09:40,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:40,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:40,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:40,634 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:40,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-15 13:09:40,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:09:40,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:40,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962459607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:40,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:40,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-02-15 13:09:40,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565280035] [2022-02-15 13:09:40,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:40,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:40,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:40,777 INFO L87 Difference]: Start difference. First operand 4905 states and 15289 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:41,229 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2022-02-15 13:09:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:09:41,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:41,242 INFO L225 Difference]: With dead ends: 6307 [2022-02-15 13:09:41,242 INFO L226 Difference]: Without dead ends: 6307 [2022-02-15 13:09:41,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:09:41,243 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:41,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 163 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2022-02-15 13:09:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2022-02-15 13:09:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 3.1271336080047085) internal successors, (15939), 5097 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2022-02-15 13:09:41,343 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2022-02-15 13:09:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:41,343 INFO L470 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2022-02-15 13:09:41,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2022-02-15 13:09:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:41,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:41,351 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:41,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-02-15 13:09:41,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:41,551 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash 230557405, now seen corresponding path program 259 times [2022-02-15 13:09:41,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:41,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93518666] [2022-02-15 13:09:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:41,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:41,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:41,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93518666] [2022-02-15 13:09:41,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93518666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:41,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711885726] [2022-02-15 13:09:41,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:41,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:41,590 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:41,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-15 13:09:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:41,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:41,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711885726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:41,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:41,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 19 [2022-02-15 13:09:41,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866900189] [2022-02-15 13:09:41,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:41,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:41,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:41,761 INFO L87 Difference]: Start difference. First operand 5098 states and 15939 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:42,437 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2022-02-15 13:09:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:09:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:42,450 INFO L225 Difference]: With dead ends: 6203 [2022-02-15 13:09:42,450 INFO L226 Difference]: Without dead ends: 6194 [2022-02-15 13:09:42,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:09:42,451 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 189 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:42,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 171 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:42,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2022-02-15 13:09:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2022-02-15 13:09:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 3.122859418558343) internal successors, (15683), 5022 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2022-02-15 13:09:42,548 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2022-02-15 13:09:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:42,548 INFO L470 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2022-02-15 13:09:42,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2022-02-15 13:09:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:42,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:42,556 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:42,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-02-15 13:09:42,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:42,756 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash 765787207, now seen corresponding path program 260 times [2022-02-15 13:09:42,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:42,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538016816] [2022-02-15 13:09:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:42,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:42,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:42,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538016816] [2022-02-15 13:09:42,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538016816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:42,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714715291] [2022-02-15 13:09:42,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:42,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:42,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:42,799 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:42,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-15 13:09:42,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:42,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:42,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:42,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:42,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714715291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:42,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:42,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 20 [2022-02-15 13:09:42,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771667222] [2022-02-15 13:09:42,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:42,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:42,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:42,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:42,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:42,945 INFO L87 Difference]: Start difference. First operand 5023 states and 15683 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:43,605 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2022-02-15 13:09:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:09:43,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:43,618 INFO L225 Difference]: With dead ends: 6188 [2022-02-15 13:09:43,618 INFO L226 Difference]: Without dead ends: 6176 [2022-02-15 13:09:43,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:09:43,618 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 218 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:43,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 157 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2022-02-15 13:09:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2022-02-15 13:09:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 3.1220535357570913) internal successors, (15629), 5006 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2022-02-15 13:09:43,740 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2022-02-15 13:09:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:43,740 INFO L470 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2022-02-15 13:09:43,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2022-02-15 13:09:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:43,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:43,748 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:43,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-02-15 13:09:43,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:43,949 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:43,949 INFO L85 PathProgramCache]: Analyzing trace with hash 178041885, now seen corresponding path program 261 times [2022-02-15 13:09:43,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:43,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103560195] [2022-02-15 13:09:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:43,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:43,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:43,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103560195] [2022-02-15 13:09:43,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103560195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:43,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108633725] [2022-02-15 13:09:43,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:43,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:43,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:44,000 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:44,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-15 13:09:44,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:44,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:44,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:44,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108633725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:44,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:44,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2022-02-15 13:09:44,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301817567] [2022-02-15 13:09:44,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:44,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:44,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:44,157 INFO L87 Difference]: Start difference. First operand 5007 states and 15629 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:44,774 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2022-02-15 13:09:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:09:44,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:44,784 INFO L225 Difference]: With dead ends: 6237 [2022-02-15 13:09:44,785 INFO L226 Difference]: Without dead ends: 6219 [2022-02-15 13:09:44,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:09:44,786 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:44,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 200 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2022-02-15 13:09:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2022-02-15 13:09:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 3.1240047770700636) internal successors, (15695), 5024 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2022-02-15 13:09:44,869 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2022-02-15 13:09:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:44,869 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2022-02-15 13:09:44,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2022-02-15 13:09:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:44,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:44,875 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:44,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:45,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:45,076 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash -862193913, now seen corresponding path program 262 times [2022-02-15 13:09:45,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:45,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572092143] [2022-02-15 13:09:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:45,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:45,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:45,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572092143] [2022-02-15 13:09:45,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572092143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:45,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751566438] [2022-02-15 13:09:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:45,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:45,151 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:45,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-15 13:09:45,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:45,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:45,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:45,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:45,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751566438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:45,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:45,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-02-15 13:09:45,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467161917] [2022-02-15 13:09:45,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:45,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:09:45,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:09:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:09:45,330 INFO L87 Difference]: Start difference. First operand 5025 states and 15695 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:45,869 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2022-02-15 13:09:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:09:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 13:09:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:45,881 INFO L225 Difference]: With dead ends: 6089 [2022-02-15 13:09:45,881 INFO L226 Difference]: Without dead ends: 6065 [2022-02-15 13:09:45,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:09:45,882 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:45,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 116 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2022-02-15 13:09:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2022-02-15 13:09:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 3.125619179710719) internal successors, (15775), 5047 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2022-02-15 13:09:45,996 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2022-02-15 13:09:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:45,996 INFO L470 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2022-02-15 13:09:45,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2022-02-15 13:09:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:46,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:46,004 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:46,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:46,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-02-15 13:09:46,205 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash -823805741, now seen corresponding path program 263 times [2022-02-15 13:09:46,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:46,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058748024] [2022-02-15 13:09:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:46,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:46,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:46,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058748024] [2022-02-15 13:09:46,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058748024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:46,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420351346] [2022-02-15 13:09:46,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:46,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:46,262 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:46,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-15 13:09:46,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:09:46,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:46,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:46,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:46,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:46,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420351346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:46,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:46,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-02-15 13:09:46,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834624254] [2022-02-15 13:09:46,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:46,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:09:46,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:09:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:09:46,439 INFO L87 Difference]: Start difference. First operand 5048 states and 15775 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:09:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:46,985 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2022-02-15 13:09:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:09:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 22 [2022-02-15 13:09:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:46,996 INFO L225 Difference]: With dead ends: 5685 [2022-02-15 13:09:46,996 INFO L226 Difference]: Without dead ends: 5685 [2022-02-15 13:09:46,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:09:46,997 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:46,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 145 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2022-02-15 13:09:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2022-02-15 13:09:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 3.1196547665751275) internal successors, (15904), 5098 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2022-02-15 13:09:47,093 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2022-02-15 13:09:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:47,093 INFO L470 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2022-02-15 13:09:47,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:09:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2022-02-15 13:09:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:47,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:47,101 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:47,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-15 13:09:47,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:47,302 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:47,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1425746357, now seen corresponding path program 264 times [2022-02-15 13:09:47,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:47,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74397150] [2022-02-15 13:09:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:47,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:47,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:47,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74397150] [2022-02-15 13:09:47,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74397150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:47,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23465655] [2022-02-15 13:09:47,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:47,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:47,351 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:47,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-15 13:09:47,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:09:47,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:47,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:47,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:47,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23465655] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:47,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:47,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 22 [2022-02-15 13:09:47,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564550469] [2022-02-15 13:09:47,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:47,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:09:47,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:09:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:09:47,524 INFO L87 Difference]: Start difference. First operand 5099 states and 15904 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:09:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:48,022 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2022-02-15 13:09:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:09:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 22 [2022-02-15 13:09:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:48,036 INFO L225 Difference]: With dead ends: 6196 [2022-02-15 13:09:48,037 INFO L226 Difference]: Without dead ends: 6196 [2022-02-15 13:09:48,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:09:48,037 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:48,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 242 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2022-02-15 13:09:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2022-02-15 13:09:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.119420068676078) internal successors, (16352), 5242 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2022-02-15 13:09:48,161 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2022-02-15 13:09:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:48,161 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2022-02-15 13:09:48,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:09:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2022-02-15 13:09:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:48,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:48,169 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:48,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-02-15 13:09:48,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-15 13:09:48,369 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2018519507, now seen corresponding path program 265 times [2022-02-15 13:09:48,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:48,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607198318] [2022-02-15 13:09:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:48,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:48,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:48,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607198318] [2022-02-15 13:09:48,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607198318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:48,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533822159] [2022-02-15 13:09:48,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:48,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:48,413 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:48,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-15 13:09:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:48,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:48,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:48,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:48,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533822159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:48,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:48,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2022-02-15 13:09:48,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337036266] [2022-02-15 13:09:48,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:48,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:48,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:48,578 INFO L87 Difference]: Start difference. First operand 5243 states and 16352 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) [2022-02-15 13:09:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:49,077 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2022-02-15 13:09:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 13:09:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22 [2022-02-15 13:09:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:49,089 INFO L225 Difference]: With dead ends: 6611 [2022-02-15 13:09:49,089 INFO L226 Difference]: Without dead ends: 6611 [2022-02-15 13:09:49,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:09:49,090 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 153 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:49,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 301 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2022-02-15 13:09:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2022-02-15 13:09:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 3.1225055432372506) internal successors, (16899), 5412 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2022-02-15 13:09:49,179 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2022-02-15 13:09:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:49,180 INFO L470 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2022-02-15 13:09:49,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) [2022-02-15 13:09:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2022-02-15 13:09:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:49,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:49,187 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:49,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-02-15 13:09:49,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-15 13:09:49,387 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash -502774453, now seen corresponding path program 266 times [2022-02-15 13:09:49,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:49,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441238084] [2022-02-15 13:09:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:49,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:49,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:49,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441238084] [2022-02-15 13:09:49,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441238084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:49,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536736154] [2022-02-15 13:09:49,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:49,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:49,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:49,426 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:49,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-15 13:09:49,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:49,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:49,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:49,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:49,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536736154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:49,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:49,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 20 [2022-02-15 13:09:49,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41061951] [2022-02-15 13:09:49,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:49,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:49,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:49,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:49,577 INFO L87 Difference]: Start difference. First operand 5413 states and 16899 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2022-02-15 13:09:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:50,054 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2022-02-15 13:09:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:09:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2022-02-15 13:09:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:50,071 INFO L225 Difference]: With dead ends: 7182 [2022-02-15 13:09:50,072 INFO L226 Difference]: Without dead ends: 7182 [2022-02-15 13:09:50,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:09:50,072 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 165 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:50,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 226 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2022-02-15 13:09:50,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2022-02-15 13:09:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.128416257883672) internal successors, (17857), 5708 states have internal predecessors, (17857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2022-02-15 13:09:50,230 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2022-02-15 13:09:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2022-02-15 13:09:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2022-02-15 13:09:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2022-02-15 13:09:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:50,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:50,239 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:50,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-02-15 13:09:50,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-15 13:09:50,440 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1415390509, now seen corresponding path program 267 times [2022-02-15 13:09:50,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:50,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91702119] [2022-02-15 13:09:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:50,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:50,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91702119] [2022-02-15 13:09:50,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91702119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:50,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820874677] [2022-02-15 13:09:50,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:50,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:50,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:50,478 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:50,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-15 13:09:50,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:50,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:50,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:50,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:50,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820874677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:50,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:50,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-02-15 13:09:50,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904653623] [2022-02-15 13:09:50,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:50,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:50,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:50,626 INFO L87 Difference]: Start difference. First operand 5709 states and 17857 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:09:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:51,105 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2022-02-15 13:09:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:09:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2022-02-15 13:09:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:51,121 INFO L225 Difference]: With dead ends: 8455 [2022-02-15 13:09:51,121 INFO L226 Difference]: Without dead ends: 8455 [2022-02-15 13:09:51,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:09:51,121 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 215 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:51,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 181 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2022-02-15 13:09:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2022-02-15 13:09:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6969 states have (on average 3.147366910604104) internal successors, (21934), 6969 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2022-02-15 13:09:51,253 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2022-02-15 13:09:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:51,253 INFO L470 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2022-02-15 13:09:51,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:09:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2022-02-15 13:09:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:51,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:51,264 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:51,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:51,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:51,464 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash -843935703, now seen corresponding path program 268 times [2022-02-15 13:09:51,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:51,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329020931] [2022-02-15 13:09:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:51,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:51,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:51,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329020931] [2022-02-15 13:09:51,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329020931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:51,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816728128] [2022-02-15 13:09:51,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:51,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:51,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:51,500 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:51,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-15 13:09:51,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:51,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:51,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816728128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:51,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:51,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 19 [2022-02-15 13:09:51,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438060718] [2022-02-15 13:09:51,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:51,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:51,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:51,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:51,648 INFO L87 Difference]: Start difference. First operand 6970 states and 21934 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:09:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:52,402 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2022-02-15 13:09:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:09:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2022-02-15 13:09:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:52,416 INFO L225 Difference]: With dead ends: 8123 [2022-02-15 13:09:52,416 INFO L226 Difference]: Without dead ends: 8117 [2022-02-15 13:09:52,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 13:09:52,418 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 198 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:52,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 175 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2022-02-15 13:09:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2022-02-15 13:09:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 3.1440323278972433) internal successors, (21785), 6929 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2022-02-15 13:09:52,560 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2022-02-15 13:09:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:52,560 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2022-02-15 13:09:52,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-02-15 13:09:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2022-02-15 13:09:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:52,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:52,571 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:52,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-02-15 13:09:52,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:52,771 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash -308705901, now seen corresponding path program 269 times [2022-02-15 13:09:52,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:52,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856856975] [2022-02-15 13:09:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:52,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:52,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:52,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856856975] [2022-02-15 13:09:52,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856856975] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:52,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061951832] [2022-02-15 13:09:52,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:52,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:52,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:52,812 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:52,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-15 13:09:52,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:09:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:52,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:52,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:52,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:52,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061951832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:52,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:52,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 20 [2022-02-15 13:09:52,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61192319] [2022-02-15 13:09:52,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:52,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:52,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:52,961 INFO L87 Difference]: Start difference. First operand 6930 states and 21785 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2022-02-15 13:09:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:53,646 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2022-02-15 13:09:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:09:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2022-02-15 13:09:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:53,660 INFO L225 Difference]: With dead ends: 8123 [2022-02-15 13:09:53,660 INFO L226 Difference]: Without dead ends: 8111 [2022-02-15 13:09:53,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:09:53,661 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:53,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 167 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2022-02-15 13:09:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2022-02-15 13:09:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 3.1453941669073058) internal successors, (21785), 6926 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2022-02-15 13:09:53,778 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2022-02-15 13:09:53,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:53,778 INFO L470 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2022-02-15 13:09:53,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2022-02-15 13:09:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2022-02-15 13:09:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:53,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:53,788 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:53,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:53,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-02-15 13:09:53,988 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash -896451223, now seen corresponding path program 270 times [2022-02-15 13:09:53,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:53,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329650270] [2022-02-15 13:09:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:53,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:54,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:54,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329650270] [2022-02-15 13:09:54,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329650270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:54,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648436419] [2022-02-15 13:09:54,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:54,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:54,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:54,041 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:54,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-15 13:09:54,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:09:54,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:54,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:54,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:54,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:54,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648436419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:54,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:54,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2022-02-15 13:09:54,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845554303] [2022-02-15 13:09:54,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:54,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:54,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:54,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:54,197 INFO L87 Difference]: Start difference. First operand 6927 states and 21785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) [2022-02-15 13:09:54,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:54,837 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2022-02-15 13:09:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:09:54,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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 22 [2022-02-15 13:09:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:54,849 INFO L225 Difference]: With dead ends: 8230 [2022-02-15 13:09:54,849 INFO L226 Difference]: Without dead ends: 8212 [2022-02-15 13:09:54,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:09:54,850 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 186 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:54,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 157 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2022-02-15 13:09:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2022-02-15 13:09:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.148927159796725) internal successors, (22307), 7084 states have internal predecessors, (22307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2022-02-15 13:09:54,974 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2022-02-15 13:09:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:54,975 INFO L470 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2022-02-15 13:09:54,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) [2022-02-15 13:09:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2022-02-15 13:09:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:54,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:54,984 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:55,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:55,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:55,185 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:55,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1936687021, now seen corresponding path program 271 times [2022-02-15 13:09:55,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:55,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468916943] [2022-02-15 13:09:55,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:55,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:55,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:55,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468916943] [2022-02-15 13:09:55,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468916943] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:55,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410798168] [2022-02-15 13:09:55,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:55,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:55,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:55,234 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:55,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-15 13:09:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:55,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:55,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410798168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:55,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:55,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 22 [2022-02-15 13:09:55,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575098595] [2022-02-15 13:09:55,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:55,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:09:55,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:09:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:09:55,392 INFO L87 Difference]: Start difference. First operand 7085 states and 22307 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:09:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:55,985 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2022-02-15 13:09:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:09:55,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 22 [2022-02-15 13:09:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:56,000 INFO L225 Difference]: With dead ends: 8473 [2022-02-15 13:09:56,000 INFO L226 Difference]: Without dead ends: 8449 [2022-02-15 13:09:56,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:09:56,001 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 164 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:56,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 202 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2022-02-15 13:09:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2022-02-15 13:09:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7304 states have (on average 3.1519715224534504) internal successors, (23022), 7304 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2022-02-15 13:09:56,174 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2022-02-15 13:09:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:56,174 INFO L470 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2022-02-15 13:09:56,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:09:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2022-02-15 13:09:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 13:09:56,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:56,184 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:56,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-02-15 13:09:56,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:56,385 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:56,385 INFO L85 PathProgramCache]: Analyzing trace with hash 175741609, now seen corresponding path program 272 times [2022-02-15 13:09:56,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:56,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022999373] [2022-02-15 13:09:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:56,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:56,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:56,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022999373] [2022-02-15 13:09:56,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022999373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:56,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130274650] [2022-02-15 13:09:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:56,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:56,439 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:56,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-15 13:09:56,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:56,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-15 13:09:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:56,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:56,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130274650] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:56,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:56,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-02-15 13:09:56,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526759362] [2022-02-15 13:09:56,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:56,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:09:56,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:09:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:09:56,605 INFO L87 Difference]: Start difference. First operand 7305 states and 23022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:09:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:57,111 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2022-02-15 13:09:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:09:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 22 [2022-02-15 13:09:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:57,125 INFO L225 Difference]: With dead ends: 8382 [2022-02-15 13:09:57,125 INFO L226 Difference]: Without dead ends: 8352 [2022-02-15 13:09:57,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:09:57,126 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:57,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 129 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:09:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2022-02-15 13:09:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2022-02-15 13:09:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.1509793253536453) internal successors, (23166), 7352 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2022-02-15 13:09:57,250 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2022-02-15 13:09:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:57,250 INFO L470 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2022-02-15 13:09:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:09:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2022-02-15 13:09:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:09:57,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:57,261 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:57,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-02-15 13:09:57,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-02-15 13:09:57,461 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:57,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1983045351, now seen corresponding path program 273 times [2022-02-15 13:09:57,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:57,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286225694] [2022-02-15 13:09:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:57,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:57,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:57,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286225694] [2022-02-15 13:09:57,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286225694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:57,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976617269] [2022-02-15 13:09:57,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:57,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:57,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:57,619 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:57,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-15 13:09:57,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:57,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:09:57,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:57,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:58,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976617269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:58,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:58,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-02-15 13:09:58,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517522200] [2022-02-15 13:09:58,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:58,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:09:58,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:09:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:09:58,104 INFO L87 Difference]: Start difference. First operand 7353 states and 23166 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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) [2022-02-15 13:09:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:58,786 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2022-02-15 13:09:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:09:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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 23 [2022-02-15 13:09:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:58,801 INFO L225 Difference]: With dead ends: 7724 [2022-02-15 13:09:58,801 INFO L226 Difference]: Without dead ends: 7695 [2022-02-15 13:09:58,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:09:58,801 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 158 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:58,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 859 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:09:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2022-02-15 13:09:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2022-02-15 13:09:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.140099878526117) internal successors, (23265), 7409 states have internal predecessors, (23265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2022-02-15 13:09:58,912 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2022-02-15 13:09:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:58,912 INFO L470 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2022-02-15 13:09:58,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 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) [2022-02-15 13:09:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2022-02-15 13:09:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:09:58,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:58,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:58,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-02-15 13:09:59,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:59,122 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:09:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1192842795, now seen corresponding path program 274 times [2022-02-15 13:09:59,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:59,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060030835] [2022-02-15 13:09:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:59,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:59,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:59,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060030835] [2022-02-15 13:09:59,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060030835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:59,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8193023] [2022-02-15 13:09:59,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:59,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:59,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:59,255 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:59,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-15 13:09:59,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:59,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:59,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:09:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:59,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:59,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8193023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:59,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:59,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-15 13:09:59,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293967969] [2022-02-15 13:09:59,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:59,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:09:59,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:09:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:09:59,808 INFO L87 Difference]: Start difference. First operand 7410 states and 23265 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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) [2022-02-15 13:10:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:00,269 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2022-02-15 13:10:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:10:00,270 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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 23 [2022-02-15 13:10:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:00,284 INFO L225 Difference]: With dead ends: 7815 [2022-02-15 13:10:00,284 INFO L226 Difference]: Without dead ends: 7808 [2022-02-15 13:10:00,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:10:00,285 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 215 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:00,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 780 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:00,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2022-02-15 13:10:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2022-02-15 13:10:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.1443985613427468) internal successors, (23605), 7507 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2022-02-15 13:10:00,414 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2022-02-15 13:10:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:00,414 INFO L470 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2022-02-15 13:10:00,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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) [2022-02-15 13:10:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2022-02-15 13:10:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:00,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:00,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:00,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-02-15 13:10:00,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-02-15 13:10:00,625 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:00,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1487421777, now seen corresponding path program 275 times [2022-02-15 13:10:00,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:00,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45327136] [2022-02-15 13:10:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:00,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:00,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:00,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45327136] [2022-02-15 13:10:00,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45327136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:00,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080034398] [2022-02-15 13:10:00,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:00,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:00,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:00,764 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:00,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-15 13:10:00,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:10:00,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:01,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:01,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080034398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:01,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:01,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-15 13:10:01,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973150750] [2022-02-15 13:10:01,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:01,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:10:01,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:10:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:10:01,355 INFO L87 Difference]: Start difference. First operand 7508 states and 23605 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:01,866 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2022-02-15 13:10:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:10:01,866 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:01,883 INFO L225 Difference]: With dead ends: 7801 [2022-02-15 13:10:01,884 INFO L226 Difference]: Without dead ends: 7785 [2022-02-15 13:10:01,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:10:01,884 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 215 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:01,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 740 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2022-02-15 13:10:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2022-02-15 13:10:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-02-15 13:10:02,063 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-02-15 13:10:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:02,063 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-02-15 13:10:02,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-02-15 13:10:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:02,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:02,076 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:02,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-02-15 13:10:02,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-02-15 13:10:02,277 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1764297601, now seen corresponding path program 276 times [2022-02-15 13:10:02,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:02,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903761901] [2022-02-15 13:10:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:02,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:02,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:02,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903761901] [2022-02-15 13:10:02,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903761901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:02,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375464704] [2022-02-15 13:10:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:02,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:02,419 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:02,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-15 13:10:02,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:10:02,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:02,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:02,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:02,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375464704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:02,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:02,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-15 13:10:02,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82439680] [2022-02-15 13:10:02,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:02,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:02,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:02,999 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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) [2022-02-15 13:10:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:03,493 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2022-02-15 13:10:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:10:03,493 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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 23 [2022-02-15 13:10:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:03,511 INFO L225 Difference]: With dead ends: 7734 [2022-02-15 13:10:03,511 INFO L226 Difference]: Without dead ends: 7727 [2022-02-15 13:10:03,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:10:03,511 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 226 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:03,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 725 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2022-02-15 13:10:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2022-02-15 13:10:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-02-15 13:10:03,668 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-02-15 13:10:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:03,669 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-02-15 13:10:03,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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) [2022-02-15 13:10:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-02-15 13:10:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:03,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:03,682 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:03,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:03,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-02-15 13:10:03,882 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:03,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1995439893, now seen corresponding path program 277 times [2022-02-15 13:10:03,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:03,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012775481] [2022-02-15 13:10:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:03,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:04,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:04,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012775481] [2022-02-15 13:10:04,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012775481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:04,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983440801] [2022-02-15 13:10:04,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:04,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:04,030 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:04,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-15 13:10:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:04,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983440801] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:04,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:04,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-02-15 13:10:04,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512839236] [2022-02-15 13:10:04,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:04,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:10:04,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:10:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:10:04,604 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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) [2022-02-15 13:10:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:05,199 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2022-02-15 13:10:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:10:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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 23 [2022-02-15 13:10:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:05,216 INFO L225 Difference]: With dead ends: 7751 [2022-02-15 13:10:05,217 INFO L226 Difference]: Without dead ends: 7744 [2022-02-15 13:10:05,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:10:05,217 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 174 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:05,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 844 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2022-02-15 13:10:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2022-02-15 13:10:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-02-15 13:10:05,369 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-02-15 13:10:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:05,369 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-02-15 13:10:05,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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) [2022-02-15 13:10:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-02-15 13:10:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:05,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:05,383 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:05,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-02-15 13:10:05,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:05,583 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1711782081, now seen corresponding path program 278 times [2022-02-15 13:10:05,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:05,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630508251] [2022-02-15 13:10:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:05,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:05,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:05,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630508251] [2022-02-15 13:10:05,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630508251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:05,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725575820] [2022-02-15 13:10:05,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:05,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:05,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:05,746 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:05,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-15 13:10:05,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:05,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:06,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725575820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:06,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:06,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-02-15 13:10:06,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818496873] [2022-02-15 13:10:06,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:10:06,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:10:06,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:10:06,326 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:06,943 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2022-02-15 13:10:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:10:06,943 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:06,960 INFO L225 Difference]: With dead ends: 7771 [2022-02-15 13:10:06,960 INFO L226 Difference]: Without dead ends: 7764 [2022-02-15 13:10:06,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:10:06,960 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 166 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:06,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 815 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2022-02-15 13:10:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2022-02-15 13:10:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-02-15 13:10:07,116 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-02-15 13:10:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:07,116 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-02-15 13:10:07,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-02-15 13:10:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:07,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:07,129 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:07,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:07,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:07,330 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:07,330 INFO L85 PathProgramCache]: Analyzing trace with hash 671546283, now seen corresponding path program 279 times [2022-02-15 13:10:07,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:07,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011018550] [2022-02-15 13:10:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:07,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:07,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:07,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011018550] [2022-02-15 13:10:07,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011018550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:07,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674534143] [2022-02-15 13:10:07,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:07,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:07,501 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:07,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-15 13:10:07,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:10:07,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:07,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:07,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:08,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674534143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:08,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:08,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-02-15 13:10:08,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933894553] [2022-02-15 13:10:08,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:08,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:10:08,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:10:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:10:08,028 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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) [2022-02-15 13:10:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:08,678 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2022-02-15 13:10:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:10:08,678 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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 23 [2022-02-15 13:10:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:08,694 INFO L225 Difference]: With dead ends: 7671 [2022-02-15 13:10:08,694 INFO L226 Difference]: Without dead ends: 7664 [2022-02-15 13:10:08,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:10:08,694 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 149 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:08,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 766 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:08,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2022-02-15 13:10:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2022-02-15 13:10:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2022-02-15 13:10:08,838 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2022-02-15 13:10:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:08,838 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2022-02-15 13:10:08,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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) [2022-02-15 13:10:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2022-02-15 13:10:08,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:08,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:08,851 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:08,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-02-15 13:10:09,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-02-15 13:10:09,051 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1836712423, now seen corresponding path program 280 times [2022-02-15 13:10:09,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:09,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446748108] [2022-02-15 13:10:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:09,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:09,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:09,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446748108] [2022-02-15 13:10:09,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446748108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:09,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143800102] [2022-02-15 13:10:09,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:09,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:09,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:09,204 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:09,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-15 13:10:09,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:09,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:09,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:09,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:09,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:09,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143800102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:09,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:09,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 30 [2022-02-15 13:10:09,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798391276] [2022-02-15 13:10:09,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:10:09,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:10:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:10:09,793 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 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) [2022-02-15 13:10:10,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:10,237 INFO L93 Difference]: Finished difference Result 7746 states and 24061 transitions. [2022-02-15 13:10:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:10:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 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 23 [2022-02-15 13:10:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:10,255 INFO L225 Difference]: With dead ends: 7746 [2022-02-15 13:10:10,255 INFO L226 Difference]: Without dead ends: 7739 [2022-02-15 13:10:10,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:10,255 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 118 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:10,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 746 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2022-02-15 13:10:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7502. [2022-02-15 13:10:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1463804826023196) internal successors, (23601), 7501 states have internal predecessors, (23601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23601 transitions. [2022-02-15 13:10:10,430 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23601 transitions. Word has length 23 [2022-02-15 13:10:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:10,430 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 23601 transitions. [2022-02-15 13:10:10,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 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) [2022-02-15 13:10:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23601 transitions. [2022-02-15 13:10:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:10,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:10,443 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:10,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-02-15 13:10:10,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:10,644 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash -843552149, now seen corresponding path program 281 times [2022-02-15 13:10:10,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:10,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201802694] [2022-02-15 13:10:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:10,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:10,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:10,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201802694] [2022-02-15 13:10:10,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201802694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:10,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467920337] [2022-02-15 13:10:10,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:10,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:10,783 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:10,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-15 13:10:10,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:10:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:11,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:11,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467920337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:11,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:11,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 31 [2022-02-15 13:10:11,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877623982] [2022-02-15 13:10:11,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:11,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:10:11,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:10:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:10:11,385 INFO L87 Difference]: Start difference. First operand 7502 states and 23601 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:11,779 INFO L93 Difference]: Finished difference Result 7747 states and 24058 transitions. [2022-02-15 13:10:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:10:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:11,796 INFO L225 Difference]: With dead ends: 7747 [2022-02-15 13:10:11,796 INFO L226 Difference]: Without dead ends: 7738 [2022-02-15 13:10:11,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:11,796 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 110 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:11,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 610 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2022-02-15 13:10:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7502. [2022-02-15 13:10:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2022-02-15 13:10:11,939 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2022-02-15 13:10:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:11,939 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2022-02-15 13:10:11,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2022-02-15 13:10:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:11,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:11,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:11,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-02-15 13:10:12,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:12,152 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1372121319, now seen corresponding path program 282 times [2022-02-15 13:10:12,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:12,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653948001] [2022-02-15 13:10:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:12,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:12,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:12,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653948001] [2022-02-15 13:10:12,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653948001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:12,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704692149] [2022-02-15 13:10:12,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:12,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:12,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:12,317 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:12,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-15 13:10:12,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:10:12,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:12,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:12,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:12,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704692149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:12,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:12,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-02-15 13:10:12,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032586908] [2022-02-15 13:10:12,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:12,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:12,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:12,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:12,952 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2022-02-15 13:10:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:13,383 INFO L93 Difference]: Finished difference Result 7686 states and 23919 transitions. [2022-02-15 13:10:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:10:13,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 23 [2022-02-15 13:10:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:13,399 INFO L225 Difference]: With dead ends: 7686 [2022-02-15 13:10:13,399 INFO L226 Difference]: Without dead ends: 7679 [2022-02-15 13:10:13,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:13,400 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 129 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:13,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 651 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2022-02-15 13:10:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7502. [2022-02-15 13:10:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2022-02-15 13:10:13,550 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2022-02-15 13:10:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:13,550 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2022-02-15 13:10:13,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2022-02-15 13:10:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2022-02-15 13:10:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:13,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:13,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:13,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:13,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:13,763 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash 321834411, now seen corresponding path program 283 times [2022-02-15 13:10:13,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:13,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735530121] [2022-02-15 13:10:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:13,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:13,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:13,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735530121] [2022-02-15 13:10:13,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735530121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:13,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984562477] [2022-02-15 13:10:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:13,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:13,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:13,897 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:13,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-15 13:10:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:14,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:14,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984562477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:14,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:14,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 30 [2022-02-15 13:10:14,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568622721] [2022-02-15 13:10:14,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:14,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:10:14,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:10:14,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:10:14,524 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-02-15 13:10:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:15,005 INFO L93 Difference]: Finished difference Result 8082 states and 25035 transitions. [2022-02-15 13:10:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:10:15,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 23 [2022-02-15 13:10:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:15,055 INFO L225 Difference]: With dead ends: 8082 [2022-02-15 13:10:15,055 INFO L226 Difference]: Without dead ends: 8065 [2022-02-15 13:10:15,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:15,056 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 178 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:15,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 739 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-02-15 13:10:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7691. [2022-02-15 13:10:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.15370611183355) internal successors, (24252), 7690 states have internal predecessors, (24252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 24252 transitions. [2022-02-15 13:10:15,192 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 24252 transitions. Word has length 23 [2022-02-15 13:10:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:15,192 INFO L470 AbstractCegarLoop]: Abstraction has 7691 states and 24252 transitions. [2022-02-15 13:10:15,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-02-15 13:10:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 24252 transitions. [2022-02-15 13:10:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:15,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:15,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:15,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:15,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:15,406 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1936537135, now seen corresponding path program 284 times [2022-02-15 13:10:15,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:15,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51830826] [2022-02-15 13:10:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:15,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:15,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:15,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51830826] [2022-02-15 13:10:15,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51830826] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:15,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742112161] [2022-02-15 13:10:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:15,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:15,550 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:15,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-15 13:10:15,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:15,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:15,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:16,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742112161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:16,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:16,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 31 [2022-02-15 13:10:16,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879632186] [2022-02-15 13:10:16,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:16,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:10:16,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:16,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:10:16,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:10:16,147 INFO L87 Difference]: Start difference. First operand 7691 states and 24252 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:16,625 INFO L93 Difference]: Finished difference Result 8086 states and 25005 transitions. [2022-02-15 13:10:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:10:16,626 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:16,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:16,644 INFO L225 Difference]: With dead ends: 8086 [2022-02-15 13:10:16,644 INFO L226 Difference]: Without dead ends: 8068 [2022-02-15 13:10:16,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:10:16,645 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 198 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:16,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 747 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2022-02-15 13:10:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7641. [2022-02-15 13:10:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7641 states, 7640 states have (on average 3.148167539267016) internal successors, (24052), 7640 states have internal predecessors, (24052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 24052 transitions. [2022-02-15 13:10:16,802 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 24052 transitions. Word has length 23 [2022-02-15 13:10:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:16,802 INFO L470 AbstractCegarLoop]: Abstraction has 7641 states and 24052 transitions. [2022-02-15 13:10:16,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 24052 transitions. [2022-02-15 13:10:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:16,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:16,816 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:16,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-02-15 13:10:17,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:17,019 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash -142756693, now seen corresponding path program 285 times [2022-02-15 13:10:17,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:17,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751816510] [2022-02-15 13:10:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:17,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:17,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:17,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751816510] [2022-02-15 13:10:17,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751816510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:17,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493367389] [2022-02-15 13:10:17,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:17,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:17,156 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:17,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-15 13:10:17,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:10:17,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:17,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:17,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:17,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493367389] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:17,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:17,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 29 [2022-02-15 13:10:17,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211166280] [2022-02-15 13:10:17,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:17,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:17,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:17,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:17,761 INFO L87 Difference]: Start difference. First operand 7641 states and 24052 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:18,262 INFO L93 Difference]: Finished difference Result 7976 states and 24675 transitions. [2022-02-15 13:10:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:10:18,262 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-02-15 13:10:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:18,278 INFO L225 Difference]: With dead ends: 7976 [2022-02-15 13:10:18,279 INFO L226 Difference]: Without dead ends: 7954 [2022-02-15 13:10:18,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:18,279 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 176 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:18,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 737 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2022-02-15 13:10:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7625. [2022-02-15 13:10:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2022-02-15 13:10:18,402 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2022-02-15 13:10:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:18,402 INFO L470 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2022-02-15 13:10:18,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2022-02-15 13:10:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:18,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:18,413 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:18,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-02-15 13:10:18,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:18,613 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:18,613 INFO L85 PathProgramCache]: Analyzing trace with hash -176355921, now seen corresponding path program 286 times [2022-02-15 13:10:18,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:18,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51454404] [2022-02-15 13:10:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:18,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:18,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:18,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51454404] [2022-02-15 13:10:18,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51454404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:18,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867618786] [2022-02-15 13:10:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:18,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:18,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:18,756 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:18,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-15 13:10:18,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:18,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:19,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867618786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:19,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:19,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-02-15 13:10:19,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780705485] [2022-02-15 13:10:19,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:10:19,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:10:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:10:19,313 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:19,874 INFO L93 Difference]: Finished difference Result 7875 states and 24443 transitions. [2022-02-15 13:10:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:10:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:19,889 INFO L225 Difference]: With dead ends: 7875 [2022-02-15 13:10:19,889 INFO L226 Difference]: Without dead ends: 7868 [2022-02-15 13:10:19,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:19,889 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 120 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:19,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 752 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-02-15 13:10:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7625. [2022-02-15 13:10:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2022-02-15 13:10:20,016 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2022-02-15 13:10:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:20,016 INFO L470 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2022-02-15 13:10:20,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2022-02-15 13:10:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:20,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:20,029 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:20,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-02-15 13:10:20,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-02-15 13:10:20,229 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:20,229 INFO L85 PathProgramCache]: Analyzing trace with hash 851276801, now seen corresponding path program 287 times [2022-02-15 13:10:20,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:20,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994101598] [2022-02-15 13:10:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:20,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:20,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:20,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994101598] [2022-02-15 13:10:20,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994101598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:20,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118870585] [2022-02-15 13:10:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:20,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:20,372 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:20,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-15 13:10:20,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:10:20,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:20,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:20,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:20,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:20,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118870585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:20,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:20,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-02-15 13:10:20,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545043696] [2022-02-15 13:10:20,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:20,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:20,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:20,942 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:21,266 INFO L93 Difference]: Finished difference Result 7842 states and 24373 transitions. [2022-02-15 13:10:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:10:21,266 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-02-15 13:10:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:21,279 INFO L225 Difference]: With dead ends: 7842 [2022-02-15 13:10:21,279 INFO L226 Difference]: Without dead ends: 7829 [2022-02-15 13:10:21,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:21,279 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 142 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:21,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 479 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:10:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2022-02-15 13:10:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7608. [2022-02-15 13:10:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7607 states have (on average 3.1456553174707507) internal successors, (23929), 7607 states have internal predecessors, (23929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 23929 transitions. [2022-02-15 13:10:21,391 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 23929 transitions. Word has length 23 [2022-02-15 13:10:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:21,391 INFO L470 AbstractCegarLoop]: Abstraction has 7608 states and 23929 transitions. [2022-02-15 13:10:21,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 23929 transitions. [2022-02-15 13:10:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:21,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:21,402 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:21,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-15 13:10:21,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-02-15 13:10:21,603 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 605256295, now seen corresponding path program 288 times [2022-02-15 13:10:21,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:21,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240442538] [2022-02-15 13:10:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:21,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:21,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:21,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240442538] [2022-02-15 13:10:21,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240442538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:21,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426688244] [2022-02-15 13:10:21,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:21,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:21,753 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:21,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-15 13:10:21,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:10:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:22,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:22,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426688244] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:22,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:22,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 30 [2022-02-15 13:10:22,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948315897] [2022-02-15 13:10:22,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:22,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:10:22,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:22,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:10:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:10:22,331 INFO L87 Difference]: Start difference. First operand 7608 states and 23929 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:22,813 INFO L93 Difference]: Finished difference Result 8242 states and 25517 transitions. [2022-02-15 13:10:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:10:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:22,827 INFO L225 Difference]: With dead ends: 8242 [2022-02-15 13:10:22,827 INFO L226 Difference]: Without dead ends: 8225 [2022-02-15 13:10:22,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:22,828 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 194 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:22,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 849 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2022-02-15 13:10:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 7836. [2022-02-15 13:10:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.1537970644543716) internal successors, (24710), 7835 states have internal predecessors, (24710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 24710 transitions. [2022-02-15 13:10:22,938 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 24710 transitions. Word has length 23 [2022-02-15 13:10:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:22,938 INFO L470 AbstractCegarLoop]: Abstraction has 7836 states and 24710 transitions. [2022-02-15 13:10:22,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 24710 transitions. [2022-02-15 13:10:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:22,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:22,948 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:22,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-02-15 13:10:23,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-02-15 13:10:23,149 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2075008277, now seen corresponding path program 289 times [2022-02-15 13:10:23,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:23,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759693087] [2022-02-15 13:10:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:23,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:23,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:23,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759693087] [2022-02-15 13:10:23,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759693087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:23,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243254358] [2022-02-15 13:10:23,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:23,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:23,284 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:23,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-15 13:10:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:23,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:23,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243254358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:23,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:23,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 31 [2022-02-15 13:10:23,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805347777] [2022-02-15 13:10:23,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:23,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:10:23,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:23,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:10:23,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:10:23,851 INFO L87 Difference]: Start difference. First operand 7836 states and 24710 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2022-02-15 13:10:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:24,411 INFO L93 Difference]: Finished difference Result 8244 states and 25471 transitions. [2022-02-15 13:10:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:10:24,455 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 23 [2022-02-15 13:10:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:24,476 INFO L225 Difference]: With dead ends: 8244 [2022-02-15 13:10:24,476 INFO L226 Difference]: Without dead ends: 8226 [2022-02-15 13:10:24,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:10:24,476 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 150 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:24,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1031 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2022-02-15 13:10:24,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 7776. [2022-02-15 13:10:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 3.1481672025723473) internal successors, (24477), 7775 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 24477 transitions. [2022-02-15 13:10:24,600 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 24477 transitions. Word has length 23 [2022-02-15 13:10:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:24,600 INFO L470 AbstractCegarLoop]: Abstraction has 7776 states and 24477 transitions. [2022-02-15 13:10:24,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2022-02-15 13:10:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 24477 transitions. [2022-02-15 13:10:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:24,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:24,611 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:24,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-02-15 13:10:24,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-02-15 13:10:24,814 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash 140665191, now seen corresponding path program 290 times [2022-02-15 13:10:24,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:24,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605319388] [2022-02-15 13:10:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:24,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:24,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:24,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605319388] [2022-02-15 13:10:24,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605319388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:24,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749293982] [2022-02-15 13:10:24,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:24,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:24,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:24,950 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:24,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-15 13:10:24,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:24,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:25,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:25,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749293982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:25,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:25,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 29 [2022-02-15 13:10:25,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413048262] [2022-02-15 13:10:25,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:25,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:25,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:25,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:25,498 INFO L87 Difference]: Start difference. First operand 7776 states and 24477 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:25,970 INFO L93 Difference]: Finished difference Result 8185 states and 25224 transitions. [2022-02-15 13:10:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:10:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:25,988 INFO L225 Difference]: With dead ends: 8185 [2022-02-15 13:10:25,988 INFO L226 Difference]: Without dead ends: 8163 [2022-02-15 13:10:25,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:25,989 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 189 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:25,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 718 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2022-02-15 13:10:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 7750. [2022-02-15 13:10:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 3.145438121047877) internal successors, (24374), 7749 states have internal predecessors, (24374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 24374 transitions. [2022-02-15 13:10:26,121 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 24374 transitions. Word has length 23 [2022-02-15 13:10:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:26,121 INFO L470 AbstractCegarLoop]: Abstraction has 7750 states and 24374 transitions. [2022-02-15 13:10:26,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 24374 transitions. [2022-02-15 13:10:26,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:26,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:26,133 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:26,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-02-15 13:10:26,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:26,333 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash 107065963, now seen corresponding path program 291 times [2022-02-15 13:10:26,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:26,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116116666] [2022-02-15 13:10:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:26,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:26,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:26,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116116666] [2022-02-15 13:10:26,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116116666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:26,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858227599] [2022-02-15 13:10:26,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:26,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:26,544 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:26,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-15 13:10:26,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:10:26,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:26,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:27,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858227599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:27,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:27,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 28 [2022-02-15 13:10:27,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904540012] [2022-02-15 13:10:27,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:27,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:10:27,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:10:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:10:27,068 INFO L87 Difference]: Start difference. First operand 7750 states and 24374 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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) [2022-02-15 13:10:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:27,592 INFO L93 Difference]: Finished difference Result 8091 states and 24993 transitions. [2022-02-15 13:10:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:10:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 23 [2022-02-15 13:10:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:27,609 INFO L225 Difference]: With dead ends: 8091 [2022-02-15 13:10:27,609 INFO L226 Difference]: Without dead ends: 8065 [2022-02-15 13:10:27,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:27,610 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 152 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:27,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 719 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-02-15 13:10:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7731. [2022-02-15 13:10:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2022-02-15 13:10:27,741 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2022-02-15 13:10:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:27,741 INFO L470 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2022-02-15 13:10:27,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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) [2022-02-15 13:10:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2022-02-15 13:10:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:27,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:27,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:27,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-02-15 13:10:27,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-02-15 13:10:27,954 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:27,954 INFO L85 PathProgramCache]: Analyzing trace with hash -934510105, now seen corresponding path program 292 times [2022-02-15 13:10:27,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:27,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321174795] [2022-02-15 13:10:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:27,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:28,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:28,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321174795] [2022-02-15 13:10:28,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321174795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:28,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928599277] [2022-02-15 13:10:28,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:28,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:28,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:28,098 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:28,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-15 13:10:28,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:28,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:28,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:28,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:28,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928599277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:28,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:28,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 27 [2022-02-15 13:10:28,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441877807] [2022-02-15 13:10:28,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:28,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:10:28,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:10:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:10:28,634 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 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) [2022-02-15 13:10:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:29,211 INFO L93 Difference]: Finished difference Result 7972 states and 24730 transitions. [2022-02-15 13:10:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:10:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 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 23 [2022-02-15 13:10:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:29,225 INFO L225 Difference]: With dead ends: 7972 [2022-02-15 13:10:29,225 INFO L226 Difference]: Without dead ends: 7965 [2022-02-15 13:10:29,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:29,226 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 149 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:29,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 742 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2022-02-15 13:10:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7731. [2022-02-15 13:10:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2022-02-15 13:10:29,355 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2022-02-15 13:10:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:29,355 INFO L470 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2022-02-15 13:10:29,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 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) [2022-02-15 13:10:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2022-02-15 13:10:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:29,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:29,366 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:29,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-02-15 13:10:29,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-02-15 13:10:29,566 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:29,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2020496965, now seen corresponding path program 293 times [2022-02-15 13:10:29,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:29,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415514987] [2022-02-15 13:10:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:29,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:29,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:29,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415514987] [2022-02-15 13:10:29,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415514987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:29,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110094458] [2022-02-15 13:10:29,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:29,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:29,702 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:29,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-15 13:10:29,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:10:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:29,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:30,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110094458] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:30,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:30,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-02-15 13:10:30,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637256202] [2022-02-15 13:10:30,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:30,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:30,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:30,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:30,272 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:30,608 INFO L93 Difference]: Finished difference Result 7915 states and 24623 transitions. [2022-02-15 13:10:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:10:30,609 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-02-15 13:10:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:30,624 INFO L225 Difference]: With dead ends: 7915 [2022-02-15 13:10:30,624 INFO L226 Difference]: Without dead ends: 7902 [2022-02-15 13:10:30,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:30,625 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 216 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:30,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 529 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:10:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2022-02-15 13:10:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7707. [2022-02-15 13:10:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.1418375291980274) internal successors, (24211), 7706 states have internal predecessors, (24211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 24211 transitions. [2022-02-15 13:10:30,761 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 24211 transitions. Word has length 23 [2022-02-15 13:10:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:30,761 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 24211 transitions. [2022-02-15 13:10:30,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 24211 transitions. [2022-02-15 13:10:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:30,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:30,772 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:30,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-02-15 13:10:30,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:30,973 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 801400107, now seen corresponding path program 294 times [2022-02-15 13:10:30,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:30,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728553596] [2022-02-15 13:10:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:30,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:31,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:31,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728553596] [2022-02-15 13:10:31,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728553596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:31,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919836108] [2022-02-15 13:10:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:31,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:31,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:31,120 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:31,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-15 13:10:31,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:10:31,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:31,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:31,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:31,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919836108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:31,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:31,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 30 [2022-02-15 13:10:31,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202594616] [2022-02-15 13:10:31,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:31,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:10:31,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:10:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:10:31,654 INFO L87 Difference]: Start difference. First operand 7707 states and 24211 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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) [2022-02-15 13:10:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:32,148 INFO L93 Difference]: Finished difference Result 8283 states and 25598 transitions. [2022-02-15 13:10:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:10:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23 [2022-02-15 13:10:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:32,163 INFO L225 Difference]: With dead ends: 8283 [2022-02-15 13:10:32,163 INFO L226 Difference]: Without dead ends: 8266 [2022-02-15 13:10:32,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:32,164 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 202 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:32,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 883 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2022-02-15 13:10:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 7931. [2022-02-15 13:10:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.1479192938209333) internal successors, (24963), 7930 states have internal predecessors, (24963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 24963 transitions. [2022-02-15 13:10:32,298 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 24963 transitions. Word has length 23 [2022-02-15 13:10:32,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:32,298 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 24963 transitions. [2022-02-15 13:10:32,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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) [2022-02-15 13:10:32,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 24963 transitions. [2022-02-15 13:10:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:32,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:32,310 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:32,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-02-15 13:10:32,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:32,510 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1878864465, now seen corresponding path program 295 times [2022-02-15 13:10:32,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:32,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541615836] [2022-02-15 13:10:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:32,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:32,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:32,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541615836] [2022-02-15 13:10:32,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541615836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:32,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460914790] [2022-02-15 13:10:32,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:32,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:32,654 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:32,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-15 13:10:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:32,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:32,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:32,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:33,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460914790] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:33,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:33,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2022-02-15 13:10:33,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726749628] [2022-02-15 13:10:33,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:33,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:10:33,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:33,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:10:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:10:33,269 INFO L87 Difference]: Start difference. First operand 7931 states and 24963 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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) [2022-02-15 13:10:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:33,844 INFO L93 Difference]: Finished difference Result 8281 states and 25535 transitions. [2022-02-15 13:10:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:10:33,844 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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 23 [2022-02-15 13:10:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:33,861 INFO L225 Difference]: With dead ends: 8281 [2022-02-15 13:10:33,861 INFO L226 Difference]: Without dead ends: 8263 [2022-02-15 13:10:33,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:10:33,862 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 206 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:33,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 959 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2022-02-15 13:10:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7865. [2022-02-15 13:10:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 3.1434384537131232) internal successors, (24720), 7864 states have internal predecessors, (24720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 24720 transitions. [2022-02-15 13:10:34,014 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 24720 transitions. Word has length 23 [2022-02-15 13:10:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:34,014 INFO L470 AbstractCegarLoop]: Abstraction has 7865 states and 24720 transitions. [2022-02-15 13:10:34,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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) [2022-02-15 13:10:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 24720 transitions. [2022-02-15 13:10:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:34,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:34,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:34,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-02-15 13:10:34,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:34,228 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash 336809003, now seen corresponding path program 296 times [2022-02-15 13:10:34,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:34,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984644633] [2022-02-15 13:10:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:34,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:34,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:34,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984644633] [2022-02-15 13:10:34,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984644633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:34,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328683991] [2022-02-15 13:10:34,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:34,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:34,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:34,365 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:34,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-15 13:10:34,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:34,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:34,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:34,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:34,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328683991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:34,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:34,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 29 [2022-02-15 13:10:34,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240416322] [2022-02-15 13:10:34,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:34,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:34,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:34,917 INFO L87 Difference]: Start difference. First operand 7865 states and 24720 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2022-02-15 13:10:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:35,452 INFO L93 Difference]: Finished difference Result 8238 states and 25326 transitions. [2022-02-15 13:10:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:10:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 23 [2022-02-15 13:10:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:35,471 INFO L225 Difference]: With dead ends: 8238 [2022-02-15 13:10:35,471 INFO L226 Difference]: Without dead ends: 8216 [2022-02-15 13:10:35,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:35,471 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 206 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:35,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 823 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2022-02-15 13:10:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 7840. [2022-02-15 13:10:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7839 states have (on average 3.1408342900880215) internal successors, (24621), 7839 states have internal predecessors, (24621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 24621 transitions. [2022-02-15 13:10:35,636 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 24621 transitions. Word has length 23 [2022-02-15 13:10:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:35,636 INFO L470 AbstractCegarLoop]: Abstraction has 7840 states and 24621 transitions. [2022-02-15 13:10:35,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2022-02-15 13:10:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 24621 transitions. [2022-02-15 13:10:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:35,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:35,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:35,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:35,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:35,850 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 303209775, now seen corresponding path program 297 times [2022-02-15 13:10:35,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:35,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240088328] [2022-02-15 13:10:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:35,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:36,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:36,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240088328] [2022-02-15 13:10:36,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240088328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:36,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033488431] [2022-02-15 13:10:36,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:36,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:36,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:36,019 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:36,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-15 13:10:36,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:10:36,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:36,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:36,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:36,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033488431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:36,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:36,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 28 [2022-02-15 13:10:36,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896558981] [2022-02-15 13:10:36,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:10:36,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:10:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:10:36,551 INFO L87 Difference]: Start difference. First operand 7840 states and 24621 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:10:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:37,133 INFO L93 Difference]: Finished difference Result 8244 states and 25274 transitions. [2022-02-15 13:10:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:10:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 23 [2022-02-15 13:10:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:37,152 INFO L225 Difference]: With dead ends: 8244 [2022-02-15 13:10:37,152 INFO L226 Difference]: Without dead ends: 8218 [2022-02-15 13:10:37,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:37,153 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 152 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:37,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 811 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2022-02-15 13:10:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 7816. [2022-02-15 13:10:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7816 states, 7815 states have (on average 3.1396033269353807) internal successors, (24536), 7815 states have internal predecessors, (24536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 24536 transitions. [2022-02-15 13:10:37,318 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 24536 transitions. Word has length 23 [2022-02-15 13:10:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:37,318 INFO L470 AbstractCegarLoop]: Abstraction has 7816 states and 24536 transitions. [2022-02-15 13:10:37,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:10:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 24536 transitions. [2022-02-15 13:10:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:37,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:37,331 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:37,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-02-15 13:10:37,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-02-15 13:10:37,532 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash -738366293, now seen corresponding path program 298 times [2022-02-15 13:10:37,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:37,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491605454] [2022-02-15 13:10:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:37,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:37,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:37,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491605454] [2022-02-15 13:10:37,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491605454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:37,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752037859] [2022-02-15 13:10:37,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:37,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:37,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:37,682 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:37,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-15 13:10:37,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:37,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:38,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752037859] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:38,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:38,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2022-02-15 13:10:38,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692276713] [2022-02-15 13:10:38,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:38,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:10:38,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:38,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:10:38,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:10:38,224 INFO L87 Difference]: Start difference. First operand 7816 states and 24536 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2022-02-15 13:10:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:38,933 INFO L93 Difference]: Finished difference Result 8147 states and 25070 transitions. [2022-02-15 13:10:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:10:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 23 [2022-02-15 13:10:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:38,950 INFO L225 Difference]: With dead ends: 8147 [2022-02-15 13:10:38,950 INFO L226 Difference]: Without dead ends: 8117 [2022-02-15 13:10:38,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:38,950 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 131 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:38,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 907 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2022-02-15 13:10:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7795. [2022-02-15 13:10:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 3.1395945599178856) internal successors, (24470), 7794 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 24470 transitions. [2022-02-15 13:10:39,113 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 24470 transitions. Word has length 23 [2022-02-15 13:10:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:39,114 INFO L470 AbstractCegarLoop]: Abstraction has 7795 states and 24470 transitions. [2022-02-15 13:10:39,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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) [2022-02-15 13:10:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 24470 transitions. [2022-02-15 13:10:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:39,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:39,127 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:39,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:39,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-02-15 13:10:39,328 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1332513967, now seen corresponding path program 299 times [2022-02-15 13:10:39,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:39,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230329071] [2022-02-15 13:10:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:39,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:39,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:39,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230329071] [2022-02-15 13:10:39,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230329071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:39,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779942371] [2022-02-15 13:10:39,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:39,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:39,513 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:39,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-15 13:10:39,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:10:39,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:39,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:40,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779942371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:40,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:40,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2022-02-15 13:10:40,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371348401] [2022-02-15 13:10:40,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:40,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:10:40,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:10:40,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:10:40,003 INFO L87 Difference]: Start difference. First operand 7795 states and 24470 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-02-15 13:10:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:40,595 INFO L93 Difference]: Finished difference Result 8028 states and 24837 transitions. [2022-02-15 13:10:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:10:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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 23 [2022-02-15 13:10:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:40,612 INFO L225 Difference]: With dead ends: 8028 [2022-02-15 13:10:40,612 INFO L226 Difference]: Without dead ends: 8021 [2022-02-15 13:10:40,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:40,612 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 140 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:40,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 768 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2022-02-15 13:10:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7797. [2022-02-15 13:10:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 7796 states have (on average 3.1391739353514625) internal successors, (24473), 7796 states have internal predecessors, (24473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 24473 transitions. [2022-02-15 13:10:40,779 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 24473 transitions. Word has length 23 [2022-02-15 13:10:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:40,779 INFO L470 AbstractCegarLoop]: Abstraction has 7797 states and 24473 transitions. [2022-02-15 13:10:40,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 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) [2022-02-15 13:10:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 24473 transitions. [2022-02-15 13:10:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:40,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:40,791 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:40,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:40,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-15 13:10:40,991 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:40,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash -388383615, now seen corresponding path program 300 times [2022-02-15 13:10:40,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:40,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504587851] [2022-02-15 13:10:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:40,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:41,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:41,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504587851] [2022-02-15 13:10:41,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504587851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:41,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629930198] [2022-02-15 13:10:41,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:41,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:41,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:41,126 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:41,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-15 13:10:41,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:10:41,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:41,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:41,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:41,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:41,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629930198] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:41,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:41,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-02-15 13:10:41,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32823929] [2022-02-15 13:10:41,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:41,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:41,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:41,703 INFO L87 Difference]: Start difference. First operand 7797 states and 24473 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:42,089 INFO L93 Difference]: Finished difference Result 7916 states and 24667 transitions. [2022-02-15 13:10:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:10:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 23 [2022-02-15 13:10:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:42,106 INFO L225 Difference]: With dead ends: 7916 [2022-02-15 13:10:42,106 INFO L226 Difference]: Without dead ends: 7903 [2022-02-15 13:10:42,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:42,107 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 110 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:42,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 572 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2022-02-15 13:10:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7773. [2022-02-15 13:10:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 3.139475038600103) internal successors, (24400), 7772 states have internal predecessors, (24400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 24400 transitions. [2022-02-15 13:10:42,265 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 24400 transitions. Word has length 23 [2022-02-15 13:10:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:42,265 INFO L470 AbstractCegarLoop]: Abstraction has 7773 states and 24400 transitions. [2022-02-15 13:10:42,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) [2022-02-15 13:10:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 24400 transitions. [2022-02-15 13:10:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:42,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:42,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:42,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-02-15 13:10:42,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:42,479 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1708076313, now seen corresponding path program 301 times [2022-02-15 13:10:42,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:42,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544196907] [2022-02-15 13:10:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:42,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:42,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:42,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544196907] [2022-02-15 13:10:42,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544196907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:42,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20181980] [2022-02-15 13:10:42,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:42,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:42,611 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:42,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-15 13:10:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:42,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:43,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20181980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:43,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:43,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-15 13:10:43,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805591604] [2022-02-15 13:10:43,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:43,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:10:43,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:10:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:10:43,168 INFO L87 Difference]: Start difference. First operand 7773 states and 24400 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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) [2022-02-15 13:10:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:43,804 INFO L93 Difference]: Finished difference Result 8383 states and 25880 transitions. [2022-02-15 13:10:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:10:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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 23 [2022-02-15 13:10:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:43,824 INFO L225 Difference]: With dead ends: 8383 [2022-02-15 13:10:43,824 INFO L226 Difference]: Without dead ends: 8366 [2022-02-15 13:10:43,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:43,824 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 160 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:43,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1128 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8366 states. [2022-02-15 13:10:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8366 to 8073. [2022-02-15 13:10:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.1385034687809714) internal successors, (25334), 8072 states have internal predecessors, (25334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 25334 transitions. [2022-02-15 13:10:43,995 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 25334 transitions. Word has length 23 [2022-02-15 13:10:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:43,995 INFO L470 AbstractCegarLoop]: Abstraction has 8073 states and 25334 transitions. [2022-02-15 13:10:43,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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) [2022-02-15 13:10:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 25334 transitions. [2022-02-15 13:10:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:44,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:44,009 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:44,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-02-15 13:10:44,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-02-15 13:10:44,209 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:44,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash -93373589, now seen corresponding path program 302 times [2022-02-15 13:10:44,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:44,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841230049] [2022-02-15 13:10:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:44,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:44,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:44,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841230049] [2022-02-15 13:10:44,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841230049] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:44,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110475165] [2022-02-15 13:10:44,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:44,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:44,348 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:44,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-15 13:10:44,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:44,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:44,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110475165] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:44,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:44,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-15 13:10:44,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146458772] [2022-02-15 13:10:44,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:44,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:10:44,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:10:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:10:44,924 INFO L87 Difference]: Start difference. First operand 8073 states and 25334 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:45,511 INFO L93 Difference]: Finished difference Result 8381 states and 25825 transitions. [2022-02-15 13:10:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:10:45,511 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:45,530 INFO L225 Difference]: With dead ends: 8381 [2022-02-15 13:10:45,530 INFO L226 Difference]: Without dead ends: 8365 [2022-02-15 13:10:45,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:10:45,530 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 153 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:45,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1120 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2022-02-15 13:10:45,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 8044. [2022-02-15 13:10:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.134526917816735) internal successors, (25211), 8043 states have internal predecessors, (25211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25211 transitions. [2022-02-15 13:10:45,718 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25211 transitions. Word has length 23 [2022-02-15 13:10:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:45,718 INFO L470 AbstractCegarLoop]: Abstraction has 8044 states and 25211 transitions. [2022-02-15 13:10:45,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25211 transitions. [2022-02-15 13:10:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:45,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:45,732 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:45,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-02-15 13:10:45,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-02-15 13:10:45,932 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2122299879, now seen corresponding path program 303 times [2022-02-15 13:10:45,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:45,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462157873] [2022-02-15 13:10:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:45,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:46,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:46,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462157873] [2022-02-15 13:10:46,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462157873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:46,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449944739] [2022-02-15 13:10:46,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:46,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:46,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:46,073 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:46,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-15 13:10:46,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:10:46,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:46,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:46,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:46,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449944739] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:46,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:46,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-15 13:10:46,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003508644] [2022-02-15 13:10:46,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:46,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:46,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:46,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:46,628 INFO L87 Difference]: Start difference. First operand 8044 states and 25211 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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) [2022-02-15 13:10:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:47,265 INFO L93 Difference]: Finished difference Result 8378 states and 25745 transitions. [2022-02-15 13:10:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:10:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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 23 [2022-02-15 13:10:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:47,284 INFO L225 Difference]: With dead ends: 8378 [2022-02-15 13:10:47,284 INFO L226 Difference]: Without dead ends: 8360 [2022-02-15 13:10:47,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:47,284 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 158 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:47,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1050 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2022-02-15 13:10:47,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8008. [2022-02-15 13:10:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 3.129511677282378) internal successors, (25058), 8007 states have internal predecessors, (25058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 25058 transitions. [2022-02-15 13:10:47,448 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 25058 transitions. Word has length 23 [2022-02-15 13:10:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:47,448 INFO L470 AbstractCegarLoop]: Abstraction has 8008 states and 25058 transitions. [2022-02-15 13:10:47,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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) [2022-02-15 13:10:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 25058 transitions. [2022-02-15 13:10:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:47,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:47,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:47,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-02-15 13:10:47,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-02-15 13:10:47,662 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:47,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2088700651, now seen corresponding path program 304 times [2022-02-15 13:10:47,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:47,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350468215] [2022-02-15 13:10:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:47,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:47,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:47,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350468215] [2022-02-15 13:10:47,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350468215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:47,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761068646] [2022-02-15 13:10:47,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:47,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:47,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:47,811 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:47,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-15 13:10:47,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:47,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:48,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:48,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761068646] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:48,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:48,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-02-15 13:10:48,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033155874] [2022-02-15 13:10:48,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:48,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:10:48,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:10:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:10:48,364 INFO L87 Difference]: Start difference. First operand 8008 states and 25058 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-02-15 13:10:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:48,944 INFO L93 Difference]: Finished difference Result 8369 states and 25633 transitions. [2022-02-15 13:10:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:10:48,944 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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 23 [2022-02-15 13:10:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:48,959 INFO L225 Difference]: With dead ends: 8369 [2022-02-15 13:10:48,959 INFO L226 Difference]: Without dead ends: 8349 [2022-02-15 13:10:48,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:48,960 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 186 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:48,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 852 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2022-02-15 13:10:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 7964. [2022-02-15 13:10:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 3.126585457742057) internal successors, (24897), 7963 states have internal predecessors, (24897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 24897 transitions. [2022-02-15 13:10:49,119 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 24897 transitions. Word has length 23 [2022-02-15 13:10:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:49,120 INFO L470 AbstractCegarLoop]: Abstraction has 7964 states and 24897 transitions. [2022-02-15 13:10:49,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-02-15 13:10:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 24897 transitions. [2022-02-15 13:10:49,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:49,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:49,133 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:49,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-02-15 13:10:49,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2022-02-15 13:10:49,334 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1047124583, now seen corresponding path program 305 times [2022-02-15 13:10:49,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:49,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735390955] [2022-02-15 13:10:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:49,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:49,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:49,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735390955] [2022-02-15 13:10:49,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735390955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:49,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524788713] [2022-02-15 13:10:49,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:49,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:49,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:49,485 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:49,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-15 13:10:49,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:10:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:49,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:49,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:50,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524788713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:50,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:50,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-02-15 13:10:50,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182520571] [2022-02-15 13:10:50,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:50,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:10:50,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:10:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:10:50,012 INFO L87 Difference]: Start difference. First operand 7964 states and 24897 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-02-15 13:10:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:50,650 INFO L93 Difference]: Finished difference Result 8358 states and 25520 transitions. [2022-02-15 13:10:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:10:50,650 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 23 [2022-02-15 13:10:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:50,701 INFO L225 Difference]: With dead ends: 8358 [2022-02-15 13:10:50,701 INFO L226 Difference]: Without dead ends: 8336 [2022-02-15 13:10:50,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:50,702 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 178 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:50,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 841 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2022-02-15 13:10:50,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7922. [2022-02-15 13:10:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7922 states, 7921 states have (on average 3.1249842191642467) internal successors, (24753), 7921 states have internal predecessors, (24753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 24753 transitions. [2022-02-15 13:10:50,849 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 24753 transitions. Word has length 23 [2022-02-15 13:10:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:50,849 INFO L470 AbstractCegarLoop]: Abstraction has 7922 states and 24753 transitions. [2022-02-15 13:10:50,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-02-15 13:10:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 24753 transitions. [2022-02-15 13:10:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:50,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:50,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:50,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-02-15 13:10:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:51,062 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:51,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1176962453, now seen corresponding path program 306 times [2022-02-15 13:10:51,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:51,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348161180] [2022-02-15 13:10:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:51,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:51,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:51,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348161180] [2022-02-15 13:10:51,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348161180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:51,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570945443] [2022-02-15 13:10:51,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:51,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:51,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:51,222 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:51,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-15 13:10:51,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:10:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:51,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:51,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:51,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:51,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570945443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:51,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:51,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-02-15 13:10:51,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049925326] [2022-02-15 13:10:51,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:51,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:10:51,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:51,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:10:51,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:10:51,720 INFO L87 Difference]: Start difference. First operand 7922 states and 24753 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:52,472 INFO L93 Difference]: Finished difference Result 8208 states and 25204 transitions. [2022-02-15 13:10:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:10:52,472 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:52,490 INFO L225 Difference]: With dead ends: 8208 [2022-02-15 13:10:52,490 INFO L226 Difference]: Without dead ends: 8184 [2022-02-15 13:10:52,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:10:52,491 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 130 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:52,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 976 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:10:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2022-02-15 13:10:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7881. [2022-02-15 13:10:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 3.1266497461928933) internal successors, (24638), 7880 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 24638 transitions. [2022-02-15 13:10:52,703 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 24638 transitions. Word has length 23 [2022-02-15 13:10:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:52,704 INFO L470 AbstractCegarLoop]: Abstraction has 7881 states and 24638 transitions. [2022-02-15 13:10:52,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 24638 transitions. [2022-02-15 13:10:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:52,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:52,716 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:52,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-02-15 13:10:52,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:52,917 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1404183833, now seen corresponding path program 307 times [2022-02-15 13:10:52,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:52,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639049208] [2022-02-15 13:10:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:52,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:53,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:53,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639049208] [2022-02-15 13:10:53,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639049208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:53,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776372527] [2022-02-15 13:10:53,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:53,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:53,080 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:53,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-15 13:10:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:53,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:53,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776372527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:53,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:53,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-02-15 13:10:53,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042745476] [2022-02-15 13:10:53,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:53,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:10:53,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:10:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:10:53,570 INFO L87 Difference]: Start difference. First operand 7881 states and 24638 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-02-15 13:10:54,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:54,194 INFO L93 Difference]: Finished difference Result 8087 states and 24955 transitions. [2022-02-15 13:10:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:10:54,195 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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 23 [2022-02-15 13:10:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:54,213 INFO L225 Difference]: With dead ends: 8087 [2022-02-15 13:10:54,213 INFO L226 Difference]: Without dead ends: 8080 [2022-02-15 13:10:54,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:54,213 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 137 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:54,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 778 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2022-02-15 13:10:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7893. [2022-02-15 13:10:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7892 states have (on average 3.124176381145464) internal successors, (24656), 7892 states have internal predecessors, (24656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 24656 transitions. [2022-02-15 13:10:54,376 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 24656 transitions. Word has length 23 [2022-02-15 13:10:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:54,376 INFO L470 AbstractCegarLoop]: Abstraction has 7893 states and 24656 transitions. [2022-02-15 13:10:54,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2022-02-15 13:10:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 24656 transitions. [2022-02-15 13:10:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:54,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:54,390 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:54,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-02-15 13:10:54,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-02-15 13:10:54,590 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1674274927, now seen corresponding path program 308 times [2022-02-15 13:10:54,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:54,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113112457] [2022-02-15 13:10:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:54,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:54,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:54,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113112457] [2022-02-15 13:10:54,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113112457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:54,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105241208] [2022-02-15 13:10:54,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:54,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:54,729 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:54,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-15 13:10:54,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:54,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:54,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:55,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105241208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:55,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:55,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 30 [2022-02-15 13:10:55,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450576449] [2022-02-15 13:10:55,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:55,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:10:55,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:10:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:10:55,352 INFO L87 Difference]: Start difference. First operand 7893 states and 24656 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-02-15 13:10:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:55,721 INFO L93 Difference]: Finished difference Result 8261 states and 25496 transitions. [2022-02-15 13:10:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:10:55,721 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 23 [2022-02-15 13:10:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:55,737 INFO L225 Difference]: With dead ends: 8261 [2022-02-15 13:10:55,737 INFO L226 Difference]: Without dead ends: 8251 [2022-02-15 13:10:55,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:10:55,738 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 165 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:55,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 606 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2022-02-15 13:10:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 7953. [2022-02-15 13:10:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7952 states have (on average 3.1281438631790746) internal successors, (24875), 7952 states have internal predecessors, (24875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 24875 transitions. [2022-02-15 13:10:55,874 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 24875 transitions. Word has length 23 [2022-02-15 13:10:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:55,875 INFO L470 AbstractCegarLoop]: Abstraction has 7953 states and 24875 transitions. [2022-02-15 13:10:55,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) [2022-02-15 13:10:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 24875 transitions. [2022-02-15 13:10:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:55,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:55,887 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:55,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-02-15 13:10:56,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-02-15 13:10:56,087 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:56,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1005989645, now seen corresponding path program 309 times [2022-02-15 13:10:56,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:56,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135077710] [2022-02-15 13:10:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:56,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:56,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:56,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135077710] [2022-02-15 13:10:56,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135077710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:56,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93335183] [2022-02-15 13:10:56,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:56,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:56,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:56,227 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:56,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-15 13:10:56,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:10:56,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:56,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:56,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93335183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:56,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:56,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 31 [2022-02-15 13:10:56,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005382219] [2022-02-15 13:10:56,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:56,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:10:56,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:10:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:10:56,840 INFO L87 Difference]: Start difference. First operand 7953 states and 24875 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:57,209 INFO L93 Difference]: Finished difference Result 8243 states and 25454 transitions. [2022-02-15 13:10:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:10:57,210 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:57,228 INFO L225 Difference]: With dead ends: 8243 [2022-02-15 13:10:57,228 INFO L226 Difference]: Without dead ends: 8236 [2022-02-15 13:10:57,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:10:57,229 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 167 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:57,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 605 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2022-02-15 13:10:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 7951. [2022-02-15 13:10:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.127924528301887) internal successors, (24867), 7950 states have internal predecessors, (24867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 24867 transitions. [2022-02-15 13:10:57,425 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 24867 transitions. Word has length 23 [2022-02-15 13:10:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:57,425 INFO L470 AbstractCegarLoop]: Abstraction has 7951 states and 24867 transitions. [2022-02-15 13:10:57,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 24867 transitions. [2022-02-15 13:10:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:57,438 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:57,438 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:57,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:57,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-02-15 13:10:57,643 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2049237563, now seen corresponding path program 310 times [2022-02-15 13:10:57,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:57,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063886186] [2022-02-15 13:10:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:57,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:57,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:57,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063886186] [2022-02-15 13:10:57,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063886186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:57,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474544675] [2022-02-15 13:10:57,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:57,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:57,785 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:57,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-15 13:10:57,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:57,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:57,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:58,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:58,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474544675] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:58,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:58,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 29 [2022-02-15 13:10:58,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863569074] [2022-02-15 13:10:58,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:58,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:10:58,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:10:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:10:58,388 INFO L87 Difference]: Start difference. First operand 7951 states and 24867 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:58,721 INFO L93 Difference]: Finished difference Result 8146 states and 25212 transitions. [2022-02-15 13:10:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:10:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:10:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:58,736 INFO L225 Difference]: With dead ends: 8146 [2022-02-15 13:10:58,736 INFO L226 Difference]: Without dead ends: 8139 [2022-02-15 13:10:58,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:10:58,737 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 168 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:58,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 543 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:10:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2022-02-15 13:10:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7950. [2022-02-15 13:10:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7949 states have (on average 3.127940621461819) internal successors, (24864), 7949 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 24864 transitions. [2022-02-15 13:10:58,869 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 24864 transitions. Word has length 23 [2022-02-15 13:10:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:58,869 INFO L470 AbstractCegarLoop]: Abstraction has 7950 states and 24864 transitions. [2022-02-15 13:10:58,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 24864 transitions. [2022-02-15 13:10:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:10:58,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:58,881 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:58,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-02-15 13:10:59,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-02-15 13:10:59,082 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:10:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash -847019033, now seen corresponding path program 311 times [2022-02-15 13:10:59,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:59,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867759580] [2022-02-15 13:10:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:59,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:59,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:59,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867759580] [2022-02-15 13:10:59,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867759580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:59,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362052652] [2022-02-15 13:10:59,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:59,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:59,214 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:59,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-15 13:10:59,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:10:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:59,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:10:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:59,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:59,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362052652] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:59,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:59,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 30 [2022-02-15 13:10:59,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346296482] [2022-02-15 13:10:59,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:59,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:10:59,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:10:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:10:59,778 INFO L87 Difference]: Start difference. First operand 7950 states and 24864 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:00,206 INFO L93 Difference]: Finished difference Result 8403 states and 25974 transitions. [2022-02-15 13:11:00,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:11:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:11:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:00,222 INFO L225 Difference]: With dead ends: 8403 [2022-02-15 13:11:00,222 INFO L226 Difference]: Without dead ends: 8393 [2022-02-15 13:11:00,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:00,222 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 190 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:00,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 705 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:00,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-02-15 13:11:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8044. [2022-02-15 13:11:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.133034937212483) internal successors, (25199), 8043 states have internal predecessors, (25199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25199 transitions. [2022-02-15 13:11:00,363 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25199 transitions. Word has length 23 [2022-02-15 13:11:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:00,363 INFO L470 AbstractCegarLoop]: Abstraction has 8044 states and 25199 transitions. [2022-02-15 13:11:00,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25199 transitions. [2022-02-15 13:11:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:00,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:00,375 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:00,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-02-15 13:11:00,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-02-15 13:11:00,575 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash 767683691, now seen corresponding path program 312 times [2022-02-15 13:11:00,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:00,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056763351] [2022-02-15 13:11:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:00,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:00,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:00,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056763351] [2022-02-15 13:11:00,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056763351] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:00,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442631769] [2022-02-15 13:11:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:00,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:00,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:00,708 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:00,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-15 13:11:00,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:11:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:00,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:00,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:01,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442631769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:01,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:01,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 31 [2022-02-15 13:11:01,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049026946] [2022-02-15 13:11:01,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:01,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:11:01,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:01,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:11:01,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:11:01,284 INFO L87 Difference]: Start difference. First operand 8044 states and 25199 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2022-02-15 13:11:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:01,709 INFO L93 Difference]: Finished difference Result 8384 states and 25924 transitions. [2022-02-15 13:11:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:11:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 23 [2022-02-15 13:11:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:01,729 INFO L225 Difference]: With dead ends: 8384 [2022-02-15 13:11:01,729 INFO L226 Difference]: Without dead ends: 8377 [2022-02-15 13:11:01,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:11:01,729 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 172 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:01,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 711 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2022-02-15 13:11:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 8041. [2022-02-15 13:11:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 3.1327114427860696) internal successors, (25187), 8040 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 25187 transitions. [2022-02-15 13:11:01,931 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 25187 transitions. Word has length 23 [2022-02-15 13:11:01,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:01,931 INFO L470 AbstractCegarLoop]: Abstraction has 8041 states and 25187 transitions. [2022-02-15 13:11:01,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2022-02-15 13:11:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 25187 transitions. [2022-02-15 13:11:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:01,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:01,945 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:01,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-02-15 13:11:02,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-02-15 13:11:02,145 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash -275564227, now seen corresponding path program 313 times [2022-02-15 13:11:02,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:02,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3756859] [2022-02-15 13:11:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:02,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:02,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:02,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3756859] [2022-02-15 13:11:02,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3756859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:02,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514079602] [2022-02-15 13:11:02,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:02,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:02,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:02,285 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:02,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-15 13:11:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:02,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:02,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514079602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:02,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:02,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 29 [2022-02-15 13:11:02,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042276863] [2022-02-15 13:11:02,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:02,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:11:02,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:02,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:11:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:11:02,874 INFO L87 Difference]: Start difference. First operand 8041 states and 25187 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2022-02-15 13:11:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:03,298 INFO L93 Difference]: Finished difference Result 8323 states and 25762 transitions. [2022-02-15 13:11:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:11:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 23 [2022-02-15 13:11:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:03,316 INFO L225 Difference]: With dead ends: 8323 [2022-02-15 13:11:03,317 INFO L226 Difference]: Without dead ends: 8310 [2022-02-15 13:11:03,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:03,317 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 176 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:03,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 592 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8310 states. [2022-02-15 13:11:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 8045. [2022-02-15 13:11:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.131775236200895) internal successors, (25192), 8044 states have internal predecessors, (25192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 25192 transitions. [2022-02-15 13:11:03,485 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 25192 transitions. Word has length 23 [2022-02-15 13:11:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:03,486 INFO L470 AbstractCegarLoop]: Abstraction has 8045 states and 25192 transitions. [2022-02-15 13:11:03,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2022-02-15 13:11:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 25192 transitions. [2022-02-15 13:11:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:03,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:03,499 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:03,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-02-15 13:11:03,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:03,700 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:03,700 INFO L85 PathProgramCache]: Analyzing trace with hash 259665575, now seen corresponding path program 314 times [2022-02-15 13:11:03,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:03,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101890295] [2022-02-15 13:11:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:03,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:03,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:03,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101890295] [2022-02-15 13:11:03,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101890295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:03,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891618351] [2022-02-15 13:11:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:03,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:03,848 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:03,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-15 13:11:03,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:03,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:04,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:04,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891618351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:04,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:04,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-02-15 13:11:04,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895154903] [2022-02-15 13:11:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:04,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:11:04,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:11:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:11:04,444 INFO L87 Difference]: Start difference. First operand 8045 states and 25192 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:11:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:04,865 INFO L93 Difference]: Finished difference Result 8231 states and 25513 transitions. [2022-02-15 13:11:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:11:04,866 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 23 [2022-02-15 13:11:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:04,884 INFO L225 Difference]: With dead ends: 8231 [2022-02-15 13:11:04,884 INFO L226 Difference]: Without dead ends: 8224 [2022-02-15 13:11:04,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:11:04,884 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 151 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:04,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 579 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2022-02-15 13:11:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 8043. [2022-02-15 13:11:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8043 states, 8042 states have (on average 3.1318080079582193) internal successors, (25186), 8042 states have internal predecessors, (25186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 25186 transitions. [2022-02-15 13:11:05,046 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 25186 transitions. Word has length 23 [2022-02-15 13:11:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:05,047 INFO L470 AbstractCegarLoop]: Abstraction has 8043 states and 25186 transitions. [2022-02-15 13:11:05,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:11:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 25186 transitions. [2022-02-15 13:11:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:05,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:05,060 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:05,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-02-15 13:11:05,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:05,260 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1476834137, now seen corresponding path program 315 times [2022-02-15 13:11:05,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:05,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502178122] [2022-02-15 13:11:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:05,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:05,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:05,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502178122] [2022-02-15 13:11:05,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502178122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:05,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936850012] [2022-02-15 13:11:05,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:05,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:05,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:05,405 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:05,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-15 13:11:05,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:11:05,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:05,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:06,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936850012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:06,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:06,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-02-15 13:11:06,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342795478] [2022-02-15 13:11:06,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:06,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:11:06,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:11:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:11:06,008 INFO L87 Difference]: Start difference. First operand 8043 states and 25186 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:11:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:06,357 INFO L93 Difference]: Finished difference Result 8179 states and 25417 transitions. [2022-02-15 13:11:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:11:06,358 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 23 [2022-02-15 13:11:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:06,375 INFO L225 Difference]: With dead ends: 8179 [2022-02-15 13:11:06,375 INFO L226 Difference]: Without dead ends: 8163 [2022-02-15 13:11:06,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:11:06,376 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 174 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:06,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 403 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2022-02-15 13:11:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8022. [2022-02-15 13:11:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 3.132153098117442) internal successors, (25123), 8021 states have internal predecessors, (25123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 25123 transitions. [2022-02-15 13:11:06,569 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 25123 transitions. Word has length 23 [2022-02-15 13:11:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:06,569 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 25123 transitions. [2022-02-15 13:11:06,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:11:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 25123 transitions. [2022-02-15 13:11:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:06,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:06,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:06,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:06,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:06,784 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1697720465, now seen corresponding path program 316 times [2022-02-15 13:11:06,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:06,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753539151] [2022-02-15 13:11:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:06,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:06,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:06,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753539151] [2022-02-15 13:11:06,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753539151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:06,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742260683] [2022-02-15 13:11:06,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:06,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:06,930 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:06,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-15 13:11:06,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:06,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:07,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:07,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742260683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:07,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:07,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 30 [2022-02-15 13:11:07,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615541561] [2022-02-15 13:11:07,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:07,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:11:07,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:11:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:11:07,509 INFO L87 Difference]: Start difference. First operand 8022 states and 25123 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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) [2022-02-15 13:11:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:07,899 INFO L93 Difference]: Finished difference Result 8489 states and 26222 transitions. [2022-02-15 13:11:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:11:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23 [2022-02-15 13:11:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:07,918 INFO L225 Difference]: With dead ends: 8489 [2022-02-15 13:11:07,918 INFO L226 Difference]: Without dead ends: 8479 [2022-02-15 13:11:07,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:07,919 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 209 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:07,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 603 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2022-02-15 13:11:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8124. [2022-02-15 13:11:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.1368952357503384) internal successors, (25481), 8123 states have internal predecessors, (25481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 25481 transitions. [2022-02-15 13:11:08,088 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 25481 transitions. Word has length 23 [2022-02-15 13:11:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:08,088 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 25481 transitions. [2022-02-15 13:11:08,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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) [2022-02-15 13:11:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 25481 transitions. [2022-02-15 13:11:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:08,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:08,102 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:08,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-02-15 13:11:08,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:08,302 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash -83017741, now seen corresponding path program 317 times [2022-02-15 13:11:08,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:08,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461961565] [2022-02-15 13:11:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:08,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:08,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:08,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461961565] [2022-02-15 13:11:08,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461961565] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:08,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962351294] [2022-02-15 13:11:08,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:08,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:08,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:08,440 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:08,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-15 13:11:08,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:11:08,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:08,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:08,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:08,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:09,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962351294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:09,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:09,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 31 [2022-02-15 13:11:09,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728824137] [2022-02-15 13:11:09,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:09,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:11:09,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:11:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:11:09,062 INFO L87 Difference]: Start difference. First operand 8124 states and 25481 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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) [2022-02-15 13:11:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:09,575 INFO L93 Difference]: Finished difference Result 8470 states and 26170 transitions. [2022-02-15 13:11:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:11:09,576 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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 23 [2022-02-15 13:11:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:09,595 INFO L225 Difference]: With dead ends: 8470 [2022-02-15 13:11:09,595 INFO L226 Difference]: Without dead ends: 8463 [2022-02-15 13:11:09,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:11:09,595 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 161 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:09,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 819 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:11:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2022-02-15 13:11:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8120. [2022-02-15 13:11:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.1364700086217514) internal successors, (25465), 8119 states have internal predecessors, (25465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25465 transitions. [2022-02-15 13:11:09,776 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25465 transitions. Word has length 23 [2022-02-15 13:11:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:09,777 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 25465 transitions. [2022-02-15 13:11:09,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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) [2022-02-15 13:11:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25465 transitions. [2022-02-15 13:11:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:09,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:09,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:09,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-02-15 13:11:09,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:09,989 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1126265659, now seen corresponding path program 318 times [2022-02-15 13:11:09,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:09,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287817734] [2022-02-15 13:11:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:09,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:10,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:10,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287817734] [2022-02-15 13:11:10,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287817734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:10,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125720864] [2022-02-15 13:11:10,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:10,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:10,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:10,128 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:10,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-15 13:11:10,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:11:10,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:10,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:10,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:10,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125720864] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:10,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:10,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 29 [2022-02-15 13:11:10,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865957996] [2022-02-15 13:11:10,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:10,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:11:10,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:11:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:11:10,708 INFO L87 Difference]: Start difference. First operand 8120 states and 25465 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 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) [2022-02-15 13:11:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:11,168 INFO L93 Difference]: Finished difference Result 8466 states and 26134 transitions. [2022-02-15 13:11:11,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:11:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 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 23 [2022-02-15 13:11:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:11,184 INFO L225 Difference]: With dead ends: 8466 [2022-02-15 13:11:11,184 INFO L226 Difference]: Without dead ends: 8453 [2022-02-15 13:11:11,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:11,184 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 168 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:11,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 735 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2022-02-15 13:11:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 8117. [2022-02-15 13:11:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.13590438639724) internal successors, (25451), 8116 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25451 transitions. [2022-02-15 13:11:11,317 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25451 transitions. Word has length 23 [2022-02-15 13:11:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:11,317 INFO L470 AbstractCegarLoop]: Abstraction has 8117 states and 25451 transitions. [2022-02-15 13:11:11,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 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) [2022-02-15 13:11:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25451 transitions. [2022-02-15 13:11:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:11,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:11,329 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:11,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:11,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-02-15 13:11:11,529 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash -591035857, now seen corresponding path program 319 times [2022-02-15 13:11:11,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:11,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134006214] [2022-02-15 13:11:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:11,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:11,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:11,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134006214] [2022-02-15 13:11:11,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134006214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:11,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003826899] [2022-02-15 13:11:11,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:11,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:11,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:11,668 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:11,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-15 13:11:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:11,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:12,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003826899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:12,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:12,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 28 [2022-02-15 13:11:12,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521832329] [2022-02-15 13:11:12,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:12,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:11:12,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:11:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:11:12,233 INFO L87 Difference]: Start difference. First operand 8117 states and 25451 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 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) [2022-02-15 13:11:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:12,711 INFO L93 Difference]: Finished difference Result 8405 states and 25973 transitions. [2022-02-15 13:11:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:12,711 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 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 23 [2022-02-15 13:11:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:12,727 INFO L225 Difference]: With dead ends: 8405 [2022-02-15 13:11:12,727 INFO L226 Difference]: Without dead ends: 8389 [2022-02-15 13:11:12,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:12,727 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:12,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 674 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2022-02-15 13:11:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8120. [2022-02-15 13:11:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.134745658332307) internal successors, (25451), 8119 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25451 transitions. [2022-02-15 13:11:12,891 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25451 transitions. Word has length 23 [2022-02-15 13:11:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:12,891 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 25451 transitions. [2022-02-15 13:11:12,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 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) [2022-02-15 13:11:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25451 transitions. [2022-02-15 13:11:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:12,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:12,905 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:12,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-02-15 13:11:13,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:13,105 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1178781179, now seen corresponding path program 320 times [2022-02-15 13:11:13,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:13,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690406343] [2022-02-15 13:11:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:13,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:13,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:13,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690406343] [2022-02-15 13:11:13,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690406343] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:13,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726409260] [2022-02-15 13:11:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:13,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:13,257 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:13,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-15 13:11:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:13,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:13,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:13,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:13,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726409260] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:13,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:13,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 27 [2022-02-15 13:11:13,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083743363] [2022-02-15 13:11:13,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:13,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:11:13,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:13,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:11:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:11:13,808 INFO L87 Difference]: Start difference. First operand 8120 states and 25451 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-02-15 13:11:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:14,328 INFO L93 Difference]: Finished difference Result 8334 states and 25817 transitions. [2022-02-15 13:11:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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 23 [2022-02-15 13:11:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:14,347 INFO L225 Difference]: With dead ends: 8334 [2022-02-15 13:11:14,347 INFO L226 Difference]: Without dead ends: 8327 [2022-02-15 13:11:14,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:11:14,348 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 119 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:14,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 688 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:11:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2022-02-15 13:11:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8117. [2022-02-15 13:11:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.1347954657466732) internal successors, (25442), 8116 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25442 transitions. [2022-02-15 13:11:14,550 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25442 transitions. Word has length 23 [2022-02-15 13:11:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:14,550 INFO L470 AbstractCegarLoop]: Abstraction has 8117 states and 25442 transitions. [2022-02-15 13:11:14,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-02-15 13:11:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25442 transitions. [2022-02-15 13:11:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:14,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:14,563 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:14,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:14,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-02-15 13:11:14,764 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash 526249639, now seen corresponding path program 321 times [2022-02-15 13:11:14,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:14,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497258122] [2022-02-15 13:11:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:14,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:14,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:14,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497258122] [2022-02-15 13:11:14,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497258122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:14,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629016199] [2022-02-15 13:11:14,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:14,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:14,909 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:14,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-15 13:11:14,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:11:14,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:15,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:15,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629016199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:15,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:15,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 14] total 28 [2022-02-15 13:11:15,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179492963] [2022-02-15 13:11:15,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:15,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:11:15,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:11:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:11:15,494 INFO L87 Difference]: Start difference. First operand 8117 states and 25442 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:11:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:15,863 INFO L93 Difference]: Finished difference Result 8376 states and 25895 transitions. [2022-02-15 13:11:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:11:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 23 [2022-02-15 13:11:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:15,881 INFO L225 Difference]: With dead ends: 8376 [2022-02-15 13:11:15,882 INFO L226 Difference]: Without dead ends: 8360 [2022-02-15 13:11:15,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:11:15,882 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 174 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:15,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 432 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2022-02-15 13:11:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8101. [2022-02-15 13:11:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8101 states, 8100 states have (on average 3.1339506172839506) internal successors, (25385), 8100 states have internal predecessors, (25385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 25385 transitions. [2022-02-15 13:11:16,044 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 25385 transitions. Word has length 23 [2022-02-15 13:11:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:16,045 INFO L470 AbstractCegarLoop]: Abstraction has 8101 states and 25385 transitions. [2022-02-15 13:11:16,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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) [2022-02-15 13:11:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 25385 transitions. [2022-02-15 13:11:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:16,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:16,058 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:16,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-02-15 13:11:16,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-02-15 13:11:16,260 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash 824302597, now seen corresponding path program 322 times [2022-02-15 13:11:16,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:16,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359770025] [2022-02-15 13:11:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:16,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:16,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:16,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359770025] [2022-02-15 13:11:16,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359770025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:16,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500538369] [2022-02-15 13:11:16,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:16,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:16,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:16,413 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:16,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-15 13:11:16,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:16,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:16,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500538369] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:16,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:16,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 27 [2022-02-15 13:11:16,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787087904] [2022-02-15 13:11:16,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:16,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:11:16,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:16,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:11:16,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:11:16,981 INFO L87 Difference]: Start difference. First operand 8101 states and 25385 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-02-15 13:11:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:17,426 INFO L93 Difference]: Finished difference Result 8270 states and 25679 transitions. [2022-02-15 13:11:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:11:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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 23 [2022-02-15 13:11:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:17,445 INFO L225 Difference]: With dead ends: 8270 [2022-02-15 13:11:17,445 INFO L226 Difference]: Without dead ends: 8251 [2022-02-15 13:11:17,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:11:17,445 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 91 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:17,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 508 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2022-02-15 13:11:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8085. [2022-02-15 13:11:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 8084 states have (on average 3.13421573478476) internal successors, (25337), 8084 states have internal predecessors, (25337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 25337 transitions. [2022-02-15 13:11:17,629 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 25337 transitions. Word has length 23 [2022-02-15 13:11:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:17,630 INFO L470 AbstractCegarLoop]: Abstraction has 8085 states and 25337 transitions. [2022-02-15 13:11:17,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 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) [2022-02-15 13:11:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 25337 transitions. [2022-02-15 13:11:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:17,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:17,644 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:17,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-02-15 13:11:17,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:17,844 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:17,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1995306215, now seen corresponding path program 323 times [2022-02-15 13:11:17,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:17,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935653886] [2022-02-15 13:11:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:17,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:17,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:17,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935653886] [2022-02-15 13:11:17,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935653886] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:17,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178114817] [2022-02-15 13:11:17,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:17,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:17,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:17,973 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:17,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-15 13:11:17,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:11:17,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:17,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:18,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:18,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178114817] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:18,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:18,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 30 [2022-02-15 13:11:18,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947106249] [2022-02-15 13:11:18,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:18,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:11:18,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:11:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:11:18,529 INFO L87 Difference]: Start difference. First operand 8085 states and 25337 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2022-02-15 13:11:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:18,980 INFO L93 Difference]: Finished difference Result 8595 states and 26485 transitions. [2022-02-15 13:11:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:11:18,980 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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 23 [2022-02-15 13:11:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:19,000 INFO L225 Difference]: With dead ends: 8595 [2022-02-15 13:11:19,000 INFO L226 Difference]: Without dead ends: 8585 [2022-02-15 13:11:19,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:19,001 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 215 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:19,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 710 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2022-02-15 13:11:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8181. [2022-02-15 13:11:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8180 states have (on average 3.1383863080684598) internal successors, (25672), 8180 states have internal predecessors, (25672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 25672 transitions. [2022-02-15 13:11:19,169 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 25672 transitions. Word has length 23 [2022-02-15 13:11:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:19,169 INFO L470 AbstractCegarLoop]: Abstraction has 8181 states and 25672 transitions. [2022-02-15 13:11:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2022-02-15 13:11:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 25672 transitions. [2022-02-15 13:11:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:19,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:19,182 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:19,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-02-15 13:11:19,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:19,383 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:19,383 INFO L85 PathProgramCache]: Analyzing trace with hash -684958357, now seen corresponding path program 324 times [2022-02-15 13:11:19,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:19,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083583898] [2022-02-15 13:11:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:19,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:19,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:19,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083583898] [2022-02-15 13:11:19,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083583898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:19,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520502294] [2022-02-15 13:11:19,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:19,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:19,523 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:19,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-15 13:11:19,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:11:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:19,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:20,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520502294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:20,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:20,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2022-02-15 13:11:20,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627656679] [2022-02-15 13:11:20,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:20,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:11:20,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:11:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:11:20,099 INFO L87 Difference]: Start difference. First operand 8181 states and 25672 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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) [2022-02-15 13:11:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:20,566 INFO L93 Difference]: Finished difference Result 8579 states and 26445 transitions. [2022-02-15 13:11:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:11:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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 23 [2022-02-15 13:11:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:20,586 INFO L225 Difference]: With dead ends: 8579 [2022-02-15 13:11:20,586 INFO L226 Difference]: Without dead ends: 8572 [2022-02-15 13:11:20,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:11:20,586 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 227 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:20,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 687 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2022-02-15 13:11:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8170. [2022-02-15 13:11:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 3.138082996694822) internal successors, (25635), 8169 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 25635 transitions. [2022-02-15 13:11:20,753 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 25635 transitions. Word has length 23 [2022-02-15 13:11:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:20,753 INFO L470 AbstractCegarLoop]: Abstraction has 8170 states and 25635 transitions. [2022-02-15 13:11:20,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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) [2022-02-15 13:11:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 25635 transitions. [2022-02-15 13:11:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:20,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:20,767 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:20,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-02-15 13:11:20,968 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1728206275, now seen corresponding path program 325 times [2022-02-15 13:11:20,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:20,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727520460] [2022-02-15 13:11:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:20,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:21,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:21,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727520460] [2022-02-15 13:11:21,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727520460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:21,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626989975] [2022-02-15 13:11:21,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:21,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:21,112 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:21,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-15 13:11:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:21,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:21,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:21,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626989975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:21,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:21,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 29 [2022-02-15 13:11:21,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015029904] [2022-02-15 13:11:21,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:21,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:11:21,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:21,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:11:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:11:21,674 INFO L87 Difference]: Start difference. First operand 8170 states and 25635 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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) [2022-02-15 13:11:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:22,176 INFO L93 Difference]: Finished difference Result 8583 states and 26428 transitions. [2022-02-15 13:11:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:11:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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 23 [2022-02-15 13:11:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:22,196 INFO L225 Difference]: With dead ends: 8583 [2022-02-15 13:11:22,196 INFO L226 Difference]: Without dead ends: 8570 [2022-02-15 13:11:22,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:22,197 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 189 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:22,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 749 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:11:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2022-02-15 13:11:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8166. [2022-02-15 13:11:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 3.1375382731169625) internal successors, (25618), 8165 states have internal predecessors, (25618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 25618 transitions. [2022-02-15 13:11:22,372 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 25618 transitions. Word has length 23 [2022-02-15 13:11:22,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:22,372 INFO L470 AbstractCegarLoop]: Abstraction has 8166 states and 25618 transitions. [2022-02-15 13:11:22,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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) [2022-02-15 13:11:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 25618 transitions. [2022-02-15 13:11:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:22,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:22,386 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:22,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-02-15 13:11:22,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-02-15 13:11:22,589 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1192976473, now seen corresponding path program 326 times [2022-02-15 13:11:22,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:22,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077436754] [2022-02-15 13:11:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:22,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:22,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077436754] [2022-02-15 13:11:22,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077436754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:22,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368227561] [2022-02-15 13:11:22,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:22,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:22,737 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:22,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-15 13:11:22,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:22,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:22,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:23,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368227561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:23,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:23,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 28 [2022-02-15 13:11:23,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008451931] [2022-02-15 13:11:23,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:23,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:11:23,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:11:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:11:23,312 INFO L87 Difference]: Start difference. First operand 8166 states and 25618 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-02-15 13:11:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:23,820 INFO L93 Difference]: Finished difference Result 8591 states and 26411 transitions. [2022-02-15 13:11:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:11:23,821 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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 23 [2022-02-15 13:11:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:23,840 INFO L225 Difference]: With dead ends: 8591 [2022-02-15 13:11:23,840 INFO L226 Difference]: Without dead ends: 8575 [2022-02-15 13:11:23,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:23,841 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 250 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:23,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 676 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:11:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2022-02-15 13:11:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8162. [2022-02-15 13:11:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 3.1371155495650043) internal successors, (25602), 8161 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:24,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 25602 transitions. [2022-02-15 13:11:24,007 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 25602 transitions. Word has length 23 [2022-02-15 13:11:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:24,007 INFO L470 AbstractCegarLoop]: Abstraction has 8162 states and 25602 transitions. [2022-02-15 13:11:24,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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) [2022-02-15 13:11:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 25602 transitions. [2022-02-15 13:11:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:24,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:24,021 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:24,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:24,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:24,221 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1780721795, now seen corresponding path program 327 times [2022-02-15 13:11:24,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:24,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389150626] [2022-02-15 13:11:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:24,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:24,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:24,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389150626] [2022-02-15 13:11:24,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389150626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:24,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378651256] [2022-02-15 13:11:24,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:24,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:24,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:24,372 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:24,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-15 13:11:24,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:11:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:24,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:24,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378651256] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:24,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:24,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2022-02-15 13:11:24,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950387027] [2022-02-15 13:11:24,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:24,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:11:24,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:11:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:11:24,915 INFO L87 Difference]: Start difference. First operand 8162 states and 25602 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-02-15 13:11:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:25,481 INFO L93 Difference]: Finished difference Result 8522 states and 26260 transitions. [2022-02-15 13:11:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:11:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 23 [2022-02-15 13:11:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:25,500 INFO L225 Difference]: With dead ends: 8522 [2022-02-15 13:11:25,500 INFO L226 Difference]: Without dead ends: 8503 [2022-02-15 13:11:25,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:11:25,501 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 150 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:25,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 719 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:11:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2022-02-15 13:11:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 8158. [2022-02-15 13:11:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 3.136815005516734) internal successors, (25587), 8157 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 25587 transitions. [2022-02-15 13:11:25,724 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 25587 transitions. Word has length 23 [2022-02-15 13:11:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:25,724 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 25587 transitions. [2022-02-15 13:11:25,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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) [2022-02-15 13:11:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 25587 transitions. [2022-02-15 13:11:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:11:25,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:25,737 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:25,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-02-15 13:11:25,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:25,938 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1474009703, now seen corresponding path program 328 times [2022-02-15 13:11:25,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:25,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400435430] [2022-02-15 13:11:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:25,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:26,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400435430] [2022-02-15 13:11:26,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400435430] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:26,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330204651] [2022-02-15 13:11:26,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:26,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:26,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:26,098 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:26,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-15 13:11:26,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-15 13:11:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:26,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330204651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:26,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:26,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2022-02-15 13:11:26,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018474261] [2022-02-15 13:11:26,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:26,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:11:26,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:11:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:11:26,615 INFO L87 Difference]: Start difference. First operand 8158 states and 25587 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:27,109 INFO L93 Difference]: Finished difference Result 8435 states and 26072 transitions. [2022-02-15 13:11:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:11:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:11:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:27,128 INFO L225 Difference]: With dead ends: 8435 [2022-02-15 13:11:27,129 INFO L226 Difference]: Without dead ends: 8428 [2022-02-15 13:11:27,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:11:27,129 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 175 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:27,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 565 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2022-02-15 13:11:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8154. [2022-02-15 13:11:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 3.1368821292775664) internal successors, (25575), 8153 states have internal predecessors, (25575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 25575 transitions. [2022-02-15 13:11:27,296 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 25575 transitions. Word has length 23 [2022-02-15 13:11:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:27,296 INFO L470 AbstractCegarLoop]: Abstraction has 8154 states and 25575 transitions. [2022-02-15 13:11:27,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 25575 transitions. [2022-02-15 13:11:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:27,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:27,311 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:27,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-02-15 13:11:27,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:27,511 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1371483671, now seen corresponding path program 329 times [2022-02-15 13:11:27,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:27,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361508195] [2022-02-15 13:11:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:27,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:27,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:27,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361508195] [2022-02-15 13:11:27,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361508195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:27,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603128684] [2022-02-15 13:11:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:27,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:27,578 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:27,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-15 13:11:27,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:11:27,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:27,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:27,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:27,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603128684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:27,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:27,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-02-15 13:11:27,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975716841] [2022-02-15 13:11:27,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:27,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:11:27,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:11:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:11:27,731 INFO L87 Difference]: Start difference. First operand 8154 states and 25575 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:27,930 INFO L93 Difference]: Finished difference Result 11007 states and 33833 transitions. [2022-02-15 13:11:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:11:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:27,957 INFO L225 Difference]: With dead ends: 11007 [2022-02-15 13:11:27,957 INFO L226 Difference]: Without dead ends: 10984 [2022-02-15 13:11:27,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:11:27,958 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:27,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 119 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:27,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2022-02-15 13:11:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8149. [2022-02-15 13:11:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 3.1375797741777123) internal successors, (25565), 8148 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 25565 transitions. [2022-02-15 13:11:28,205 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 25565 transitions. Word has length 24 [2022-02-15 13:11:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:28,205 INFO L470 AbstractCegarLoop]: Abstraction has 8149 states and 25565 transitions. [2022-02-15 13:11:28,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 25565 transitions. [2022-02-15 13:11:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:28,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:28,219 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:28,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:28,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-02-15 13:11:28,419 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1727557625, now seen corresponding path program 330 times [2022-02-15 13:11:28,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:28,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419492964] [2022-02-15 13:11:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:28,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:28,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419492964] [2022-02-15 13:11:28,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419492964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:28,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833728056] [2022-02-15 13:11:28,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:28,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:28,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:28,487 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:28,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-15 13:11:28,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:11:28,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:28,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:28,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833728056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:28,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:28,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-02-15 13:11:28,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574672690] [2022-02-15 13:11:28,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:28,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:11:28,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:11:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:11:28,632 INFO L87 Difference]: Start difference. First operand 8149 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:28,798 INFO L93 Difference]: Finished difference Result 11150 states and 34266 transitions. [2022-02-15 13:11:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:11:28,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:28,824 INFO L225 Difference]: With dead ends: 11150 [2022-02-15 13:11:28,825 INFO L226 Difference]: Without dead ends: 11150 [2022-02-15 13:11:28,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:11:28,825 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:28,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 88 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11150 states. [2022-02-15 13:11:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11150 to 8243. [2022-02-15 13:11:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8243 states, 8242 states have (on average 3.1360106770201406) internal successors, (25847), 8242 states have internal predecessors, (25847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 25847 transitions. [2022-02-15 13:11:29,023 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 25847 transitions. Word has length 24 [2022-02-15 13:11:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:29,024 INFO L470 AbstractCegarLoop]: Abstraction has 8243 states and 25847 transitions. [2022-02-15 13:11:29,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 25847 transitions. [2022-02-15 13:11:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:29,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:29,038 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:29,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:29,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-02-15 13:11:29,238 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:29,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:29,238 INFO L85 PathProgramCache]: Analyzing trace with hash -513773813, now seen corresponding path program 331 times [2022-02-15 13:11:29,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:29,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694737668] [2022-02-15 13:11:29,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:29,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:29,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:29,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694737668] [2022-02-15 13:11:29,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694737668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:29,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074462921] [2022-02-15 13:11:29,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:29,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:29,318 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:29,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-15 13:11:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:29,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:29,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:29,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074462921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:29,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:29,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:29,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487702725] [2022-02-15 13:11:29,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:29,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:29,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:29,497 INFO L87 Difference]: Start difference. First operand 8243 states and 25847 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:30,194 INFO L93 Difference]: Finished difference Result 12726 states and 38747 transitions. [2022-02-15 13:11:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:11:30,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:30,228 INFO L225 Difference]: With dead ends: 12726 [2022-02-15 13:11:30,228 INFO L226 Difference]: Without dead ends: 12716 [2022-02-15 13:11:30,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:11:30,229 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 327 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:30,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 138 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2022-02-15 13:11:30,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 9550. [2022-02-15 13:11:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9549 states have (on average 3.163472614933501) internal successors, (30208), 9549 states have internal predecessors, (30208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 30208 transitions. [2022-02-15 13:11:30,479 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 30208 transitions. Word has length 24 [2022-02-15 13:11:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:30,479 INFO L470 AbstractCegarLoop]: Abstraction has 9550 states and 30208 transitions. [2022-02-15 13:11:30,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 30208 transitions. [2022-02-15 13:11:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:30,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:30,521 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:30,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-02-15 13:11:30,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-02-15 13:11:30,722 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:30,722 INFO L85 PathProgramCache]: Analyzing trace with hash 57680993, now seen corresponding path program 332 times [2022-02-15 13:11:30,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:30,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843921560] [2022-02-15 13:11:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:30,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:30,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843921560] [2022-02-15 13:11:30,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843921560] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:30,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346965753] [2022-02-15 13:11:30,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:30,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:30,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:30,787 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:30,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-15 13:11:30,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:30,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:30,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:30,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346965753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:30,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:30,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:30,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143962484] [2022-02-15 13:11:30,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:30,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:30,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:30,962 INFO L87 Difference]: Start difference. First operand 9550 states and 30208 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:31,667 INFO L93 Difference]: Finished difference Result 12601 states and 38222 transitions. [2022-02-15 13:11:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:11:31,667 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:31,693 INFO L225 Difference]: With dead ends: 12601 [2022-02-15 13:11:31,694 INFO L226 Difference]: Without dead ends: 12595 [2022-02-15 13:11:31,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:11:31,695 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 294 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 184 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2022-02-15 13:11:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9022. [2022-02-15 13:11:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 3.1354617004766654) internal successors, (28285), 9021 states have internal predecessors, (28285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 28285 transitions. [2022-02-15 13:11:31,899 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 28285 transitions. Word has length 24 [2022-02-15 13:11:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:31,899 INFO L470 AbstractCegarLoop]: Abstraction has 9022 states and 28285 transitions. [2022-02-15 13:11:31,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 28285 transitions. [2022-02-15 13:11:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:31,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:31,912 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:31,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-02-15 13:11:32,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-02-15 13:11:32,113 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1873890553, now seen corresponding path program 333 times [2022-02-15 13:11:32,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:32,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314038905] [2022-02-15 13:11:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:32,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:32,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:32,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314038905] [2022-02-15 13:11:32,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314038905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:32,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577379601] [2022-02-15 13:11:32,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:32,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:32,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:32,179 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:32,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-15 13:11:32,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:11:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:32,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:32,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577379601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:32,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:32,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:32,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059650661] [2022-02-15 13:11:32,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:32,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:32,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:32,336 INFO L87 Difference]: Start difference. First operand 9022 states and 28285 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:33,187 INFO L93 Difference]: Finished difference Result 11076 states and 33757 transitions. [2022-02-15 13:11:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:11:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:33,209 INFO L225 Difference]: With dead ends: 11076 [2022-02-15 13:11:33,209 INFO L226 Difference]: Without dead ends: 11076 [2022-02-15 13:11:33,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 13:11:33,210 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 214 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:33,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 306 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:11:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2022-02-15 13:11:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9541. [2022-02-15 13:11:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.1517819706498953) internal successors, (30068), 9540 states have internal predecessors, (30068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 30068 transitions. [2022-02-15 13:11:33,414 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 30068 transitions. Word has length 24 [2022-02-15 13:11:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:33,414 INFO L470 AbstractCegarLoop]: Abstraction has 9541 states and 30068 transitions. [2022-02-15 13:11:33,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 30068 transitions. [2022-02-15 13:11:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:33,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:33,427 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:33,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-02-15 13:11:33,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:33,628 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1956485639, now seen corresponding path program 334 times [2022-02-15 13:11:33,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:33,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884273527] [2022-02-15 13:11:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:33,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:33,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884273527] [2022-02-15 13:11:33,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884273527] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:33,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286838596] [2022-02-15 13:11:33,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:33,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:33,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:33,692 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:33,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-15 13:11:33,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:33,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286838596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:33,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:33,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:33,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670186711] [2022-02-15 13:11:33,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:33,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:33,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:33,843 INFO L87 Difference]: Start difference. First operand 9541 states and 30068 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:11:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:34,651 INFO L93 Difference]: Finished difference Result 10620 states and 32666 transitions. [2022-02-15 13:11:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 13:11:34,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:11:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:34,671 INFO L225 Difference]: With dead ends: 10620 [2022-02-15 13:11:34,671 INFO L226 Difference]: Without dead ends: 10616 [2022-02-15 13:11:34,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 13:11:34,672 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 151 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:34,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 236 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2022-02-15 13:11:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8587. [2022-02-15 13:11:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 8586 states have (on average 3.1179827626368506) internal successors, (26771), 8586 states have internal predecessors, (26771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 26771 transitions. [2022-02-15 13:11:34,837 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 26771 transitions. Word has length 24 [2022-02-15 13:11:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:34,837 INFO L470 AbstractCegarLoop]: Abstraction has 8587 states and 26771 transitions. [2022-02-15 13:11:34,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:11:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 26771 transitions. [2022-02-15 13:11:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:34,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:34,849 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:34,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:35,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2022-02-15 13:11:35,050 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash 592910795, now seen corresponding path program 335 times [2022-02-15 13:11:35,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:35,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824386922] [2022-02-15 13:11:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:35,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:35,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:35,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824386922] [2022-02-15 13:11:35,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824386922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:35,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779207927] [2022-02-15 13:11:35,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:35,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:35,113 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:35,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-15 13:11:35,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:11:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:35,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:35,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:35,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779207927] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:35,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:35,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:35,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387652948] [2022-02-15 13:11:35,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:35,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:35,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:35,269 INFO L87 Difference]: Start difference. First operand 8587 states and 26771 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:35,921 INFO L93 Difference]: Finished difference Result 11811 states and 35428 transitions. [2022-02-15 13:11:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:11:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:35,944 INFO L225 Difference]: With dead ends: 11811 [2022-02-15 13:11:35,944 INFO L226 Difference]: Without dead ends: 11802 [2022-02-15 13:11:35,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:11:35,945 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 312 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:35,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 158 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2022-02-15 13:11:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 8719. [2022-02-15 13:11:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.118261069052535) internal successors, (27185), 8718 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 27185 transitions. [2022-02-15 13:11:36,151 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 27185 transitions. Word has length 24 [2022-02-15 13:11:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:36,151 INFO L470 AbstractCegarLoop]: Abstraction has 8719 states and 27185 transitions. [2022-02-15 13:11:36,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 27185 transitions. [2022-02-15 13:11:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:36,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:36,165 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:36,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-02-15 13:11:36,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-02-15 13:11:36,365 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:36,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash 5165473, now seen corresponding path program 336 times [2022-02-15 13:11:36,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:36,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036951958] [2022-02-15 13:11:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:36,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:36,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:36,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036951958] [2022-02-15 13:11:36,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036951958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:36,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231055679] [2022-02-15 13:11:36,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:36,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:36,429 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:36,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-15 13:11:36,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:11:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:36,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:36,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:36,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231055679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:36,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:36,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:36,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142278351] [2022-02-15 13:11:36,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:36,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:36,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:36,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:36,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:36,584 INFO L87 Difference]: Start difference. First operand 8719 states and 27185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:37,174 INFO L93 Difference]: Finished difference Result 11970 states and 35970 transitions. [2022-02-15 13:11:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:11:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:37,197 INFO L225 Difference]: With dead ends: 11970 [2022-02-15 13:11:37,197 INFO L226 Difference]: Without dead ends: 11958 [2022-02-15 13:11:37,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:11:37,198 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 292 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:37,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 170 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2022-02-15 13:11:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 8793. [2022-02-15 13:11:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 3.1199954504094634) internal successors, (27431), 8792 states have internal predecessors, (27431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 27431 transitions. [2022-02-15 13:11:37,376 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 27431 transitions. Word has length 24 [2022-02-15 13:11:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:37,376 INFO L470 AbstractCegarLoop]: Abstraction has 8793 states and 27431 transitions. [2022-02-15 13:11:37,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 27431 transitions. [2022-02-15 13:11:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:37,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:37,389 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:37,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-02-15 13:11:37,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-02-15 13:11:37,589 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1035070325, now seen corresponding path program 337 times [2022-02-15 13:11:37,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:37,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007281041] [2022-02-15 13:11:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:37,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:37,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007281041] [2022-02-15 13:11:37,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007281041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:37,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671843617] [2022-02-15 13:11:37,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:37,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:37,652 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:37,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-15 13:11:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:37,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671843617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:37,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:37,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:37,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196147914] [2022-02-15 13:11:37,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:37,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:37,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:37,808 INFO L87 Difference]: Start difference. First operand 8793 states and 27431 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:38,347 INFO L93 Difference]: Finished difference Result 12336 states and 37268 transitions. [2022-02-15 13:11:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:11:38,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:38,371 INFO L225 Difference]: With dead ends: 12336 [2022-02-15 13:11:38,372 INFO L226 Difference]: Without dead ends: 12321 [2022-02-15 13:11:38,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:11:38,372 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 220 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:38,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 152 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2022-02-15 13:11:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8832. [2022-02-15 13:11:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8831 states have (on average 3.1192390442758464) internal successors, (27546), 8831 states have internal predecessors, (27546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 27546 transitions. [2022-02-15 13:11:38,589 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 27546 transitions. Word has length 24 [2022-02-15 13:11:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:38,589 INFO L470 AbstractCegarLoop]: Abstraction has 8832 states and 27546 transitions. [2022-02-15 13:11:38,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 27546 transitions. [2022-02-15 13:11:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:38,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:38,602 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:38,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-02-15 13:11:38,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:38,802 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:38,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1077358305, now seen corresponding path program 338 times [2022-02-15 13:11:38,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:38,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707070239] [2022-02-15 13:11:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:38,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:38,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:38,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707070239] [2022-02-15 13:11:38,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707070239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:38,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359400175] [2022-02-15 13:11:38,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:38,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:38,867 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:38,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-15 13:11:38,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:38,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:39,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359400175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:39,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:39,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:39,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357517539] [2022-02-15 13:11:39,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:39,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:39,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:39,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:39,023 INFO L87 Difference]: Start difference. First operand 8832 states and 27546 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:39,535 INFO L93 Difference]: Finished difference Result 12564 states and 38035 transitions. [2022-02-15 13:11:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:11:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:39,560 INFO L225 Difference]: With dead ends: 12564 [2022-02-15 13:11:39,560 INFO L226 Difference]: Without dead ends: 12546 [2022-02-15 13:11:39,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:11:39,561 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 209 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:39,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 178 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2022-02-15 13:11:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 8863. [2022-02-15 13:11:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.116339426765967) internal successors, (27617), 8862 states have internal predecessors, (27617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27617 transitions. [2022-02-15 13:11:39,746 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27617 transitions. Word has length 24 [2022-02-15 13:11:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:39,746 INFO L470 AbstractCegarLoop]: Abstraction has 8863 states and 27617 transitions. [2022-02-15 13:11:39,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:39,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27617 transitions. [2022-02-15 13:11:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:39,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:39,759 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:39,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:39,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:39,959 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2138136395, now seen corresponding path program 339 times [2022-02-15 13:11:39,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:39,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546364942] [2022-02-15 13:11:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:39,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:40,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546364942] [2022-02-15 13:11:40,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546364942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:40,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490084626] [2022-02-15 13:11:40,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:40,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:40,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:40,025 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:40,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-15 13:11:40,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:11:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:40,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490084626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:40,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:40,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:11:40,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453762074] [2022-02-15 13:11:40,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:40,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:40,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:40,192 INFO L87 Difference]: Start difference. First operand 8863 states and 27617 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:40,562 INFO L93 Difference]: Finished difference Result 11519 states and 34816 transitions. [2022-02-15 13:11:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:11:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:40,584 INFO L225 Difference]: With dead ends: 11519 [2022-02-15 13:11:40,584 INFO L226 Difference]: Without dead ends: 11501 [2022-02-15 13:11:40,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:11:40,584 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 180 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:40,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 149 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:11:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2022-02-15 13:11:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 8863. [2022-02-15 13:11:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.115662378695554) internal successors, (27611), 8862 states have internal predecessors, (27611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27611 transitions. [2022-02-15 13:11:40,812 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27611 transitions. Word has length 24 [2022-02-15 13:11:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:40,813 INFO L470 AbstractCegarLoop]: Abstraction has 8863 states and 27611 transitions. [2022-02-15 13:11:40,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27611 transitions. [2022-02-15 13:11:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:40,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:40,828 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:40,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-02-15 13:11:41,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:41,028 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:41,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash 906198731, now seen corresponding path program 340 times [2022-02-15 13:11:41,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:41,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051913410] [2022-02-15 13:11:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:41,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:41,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:41,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051913410] [2022-02-15 13:11:41,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051913410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:41,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533527183] [2022-02-15 13:11:41,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:41,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:41,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:41,090 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:41,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-15 13:11:41,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:41,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:41,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:41,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:41,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533527183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:41,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:41,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:11:41,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054579656] [2022-02-15 13:11:41,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:41,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:41,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:41,256 INFO L87 Difference]: Start difference. First operand 8863 states and 27611 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:11:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:42,074 INFO L93 Difference]: Finished difference Result 10540 states and 31822 transitions. [2022-02-15 13:11:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:11:42,075 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 24 [2022-02-15 13:11:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:42,099 INFO L225 Difference]: With dead ends: 10540 [2022-02-15 13:11:42,099 INFO L226 Difference]: Without dead ends: 10528 [2022-02-15 13:11:42,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:11:42,100 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 226 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:42,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 234 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2022-02-15 13:11:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 9379. [2022-02-15 13:11:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.1330774152271275) internal successors, (29382), 9378 states have internal predecessors, (29382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 29382 transitions. [2022-02-15 13:11:42,284 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 29382 transitions. Word has length 24 [2022-02-15 13:11:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:42,284 INFO L470 AbstractCegarLoop]: Abstraction has 9379 states and 29382 transitions. [2022-02-15 13:11:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:11:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 29382 transitions. [2022-02-15 13:11:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:42,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:42,297 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:42,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-02-15 13:11:42,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-02-15 13:11:42,498 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:42,498 INFO L85 PathProgramCache]: Analyzing trace with hash 441607627, now seen corresponding path program 341 times [2022-02-15 13:11:42,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:42,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322367180] [2022-02-15 13:11:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:42,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:42,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:42,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322367180] [2022-02-15 13:11:42,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322367180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:42,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310652352] [2022-02-15 13:11:42,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:42,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:42,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:42,557 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:42,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-15 13:11:42,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:11:42,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:42,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:42,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310652352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:42,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:42,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:11:42,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116726754] [2022-02-15 13:11:42,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:42,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:42,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:42,716 INFO L87 Difference]: Start difference. First operand 9379 states and 29382 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:43,602 INFO L93 Difference]: Finished difference Result 10146 states and 30795 transitions. [2022-02-15 13:11:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:11:43,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:43,621 INFO L225 Difference]: With dead ends: 10146 [2022-02-15 13:11:43,622 INFO L226 Difference]: Without dead ends: 10136 [2022-02-15 13:11:43,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 13:11:43,623 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 209 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:43,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 301 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2022-02-15 13:11:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8546. [2022-02-15 13:11:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 8545 states have (on average 3.1049736688121707) internal successors, (26532), 8545 states have internal predecessors, (26532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:43,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 26532 transitions. [2022-02-15 13:11:43,807 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 26532 transitions. Word has length 24 [2022-02-15 13:11:43,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:43,807 INFO L470 AbstractCegarLoop]: Abstraction has 8546 states and 26532 transitions. [2022-02-15 13:11:43,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 26532 transitions. [2022-02-15 13:11:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:43,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:43,819 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:43,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-02-15 13:11:44,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:44,026 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:44,026 INFO L85 PathProgramCache]: Analyzing trace with hash 408008399, now seen corresponding path program 342 times [2022-02-15 13:11:44,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:44,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470078110] [2022-02-15 13:11:44,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:44,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:44,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:44,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470078110] [2022-02-15 13:11:44,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470078110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:44,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563688166] [2022-02-15 13:11:44,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:44,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:44,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:44,090 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:44,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-15 13:11:44,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:11:44,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:44,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:44,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:44,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563688166] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:44,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:44,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-02-15 13:11:44,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504909860] [2022-02-15 13:11:44,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:44,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:11:44,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:11:44,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:11:44,251 INFO L87 Difference]: Start difference. First operand 8546 states and 26532 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:45,022 INFO L93 Difference]: Finished difference Result 9224 states and 27859 transitions. [2022-02-15 13:11:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 13:11:45,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:45,038 INFO L225 Difference]: With dead ends: 9224 [2022-02-15 13:11:45,038 INFO L226 Difference]: Without dead ends: 9216 [2022-02-15 13:11:45,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:11:45,039 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 171 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:45,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 205 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2022-02-15 13:11:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8570. [2022-02-15 13:11:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8570 states, 8569 states have (on average 3.104212860310421) internal successors, (26600), 8569 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8570 states to 8570 states and 26600 transitions. [2022-02-15 13:11:45,181 INFO L78 Accepts]: Start accepts. Automaton has 8570 states and 26600 transitions. Word has length 24 [2022-02-15 13:11:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:45,181 INFO L470 AbstractCegarLoop]: Abstraction has 8570 states and 26600 transitions. [2022-02-15 13:11:45,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 8570 states and 26600 transitions. [2022-02-15 13:11:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:45,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:45,193 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:45,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-02-15 13:11:45,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-02-15 13:11:45,394 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1189620615, now seen corresponding path program 343 times [2022-02-15 13:11:45,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:45,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751150190] [2022-02-15 13:11:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:45,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:45,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:45,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751150190] [2022-02-15 13:11:45,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751150190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:45,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99229879] [2022-02-15 13:11:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:45,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:45,450 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:45,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-15 13:11:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:45,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:45,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99229879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:45,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:45,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-02-15 13:11:45,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510094634] [2022-02-15 13:11:45,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:45,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:45,615 INFO L87 Difference]: Start difference. First operand 8570 states and 26600 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:11:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:46,364 INFO L93 Difference]: Finished difference Result 10464 states and 31357 transitions. [2022-02-15 13:11:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:11:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2022-02-15 13:11:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:46,384 INFO L225 Difference]: With dead ends: 10464 [2022-02-15 13:11:46,384 INFO L226 Difference]: Without dead ends: 10443 [2022-02-15 13:11:46,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:11:46,385 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:46,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 230 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2022-02-15 13:11:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9099. [2022-02-15 13:11:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9099 states, 9098 states have (on average 3.1227742360958453) internal successors, (28411), 9098 states have internal predecessors, (28411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 28411 transitions. [2022-02-15 13:11:46,582 INFO L78 Accepts]: Start accepts. Automaton has 9099 states and 28411 transitions. Word has length 24 [2022-02-15 13:11:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:46,582 INFO L470 AbstractCegarLoop]: Abstraction has 9099 states and 28411 transitions. [2022-02-15 13:11:46,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:11:46,582 INFO L276 IsEmpty]: Start isEmpty. Operand 9099 states and 28411 transitions. [2022-02-15 13:11:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:46,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:46,595 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:46,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:46,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-02-15 13:11:46,796 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash 725029511, now seen corresponding path program 344 times [2022-02-15 13:11:46,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:46,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625753849] [2022-02-15 13:11:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:46,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:46,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:46,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625753849] [2022-02-15 13:11:46,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625753849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:46,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757459377] [2022-02-15 13:11:46,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:46,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:46,850 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:46,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-15 13:11:46,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:46,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:46,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:46,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:47,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757459377] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:47,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:47,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-02-15 13:11:47,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712556280] [2022-02-15 13:11:47,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:47,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:47,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:47,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:47,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:47,014 INFO L87 Difference]: Start difference. First operand 9099 states and 28411 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:47,907 INFO L93 Difference]: Finished difference Result 9961 states and 30084 transitions. [2022-02-15 13:11:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:11:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:47,926 INFO L225 Difference]: With dead ends: 9961 [2022-02-15 13:11:47,926 INFO L226 Difference]: Without dead ends: 9953 [2022-02-15 13:11:47,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:11:47,927 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 234 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:47,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 255 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2022-02-15 13:11:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8603. [2022-02-15 13:11:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8603 states, 8602 states have (on average 3.106370611485701) internal successors, (26721), 8602 states have internal predecessors, (26721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 26721 transitions. [2022-02-15 13:11:48,079 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 26721 transitions. Word has length 24 [2022-02-15 13:11:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:48,079 INFO L470 AbstractCegarLoop]: Abstraction has 8603 states and 26721 transitions. [2022-02-15 13:11:48,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 26721 transitions. [2022-02-15 13:11:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:48,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:48,091 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:48,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:48,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2022-02-15 13:11:48,292 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash 691430283, now seen corresponding path program 345 times [2022-02-15 13:11:48,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:48,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898370489] [2022-02-15 13:11:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:48,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:48,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:48,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898370489] [2022-02-15 13:11:48,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898370489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:48,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422965756] [2022-02-15 13:11:48,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:48,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:48,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:48,351 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:48,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-15 13:11:48,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:11:48,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:48,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:48,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422965756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:48,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:48,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 23 [2022-02-15 13:11:48,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820352791] [2022-02-15 13:11:48,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:48,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:11:48,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:11:48,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:11:48,518 INFO L87 Difference]: Start difference. First operand 8603 states and 26721 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:49,403 INFO L93 Difference]: Finished difference Result 9572 states and 28782 transitions. [2022-02-15 13:11:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:11:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:49,417 INFO L225 Difference]: With dead ends: 9572 [2022-02-15 13:11:49,417 INFO L226 Difference]: Without dead ends: 9556 [2022-02-15 13:11:49,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:11:49,418 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 196 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:49,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 269 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2022-02-15 13:11:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8460. [2022-02-15 13:11:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 3.1066319895968793) internal successors, (26279), 8459 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 26279 transitions. [2022-02-15 13:11:49,550 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 26279 transitions. Word has length 24 [2022-02-15 13:11:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:49,550 INFO L470 AbstractCegarLoop]: Abstraction has 8460 states and 26279 transitions. [2022-02-15 13:11:49,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 26279 transitions. [2022-02-15 13:11:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:49,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:49,563 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:49,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:49,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:49,763 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -350145785, now seen corresponding path program 346 times [2022-02-15 13:11:49,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:49,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254910408] [2022-02-15 13:11:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:49,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:49,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:49,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254910408] [2022-02-15 13:11:49,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254910408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:49,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696664207] [2022-02-15 13:11:49,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:49,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:49,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:49,828 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:49,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-02-15 13:11:49,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:49,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:49,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:49,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:49,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:49,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696664207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:49,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:49,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2022-02-15 13:11:49,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095403137] [2022-02-15 13:11:49,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:49,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:11:49,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:11:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:49,999 INFO L87 Difference]: Start difference. First operand 8460 states and 26279 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:50,794 INFO L93 Difference]: Finished difference Result 9239 states and 27893 transitions. [2022-02-15 13:11:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:11:50,794 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:50,814 INFO L225 Difference]: With dead ends: 9239 [2022-02-15 13:11:50,815 INFO L226 Difference]: Without dead ends: 9227 [2022-02-15 13:11:50,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:11:50,816 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 193 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:50,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 168 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2022-02-15 13:11:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 8490. [2022-02-15 13:11:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8489 states have (on average 3.107197549770291) internal successors, (26377), 8489 states have internal predecessors, (26377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 26377 transitions. [2022-02-15 13:11:50,995 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 26377 transitions. Word has length 24 [2022-02-15 13:11:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:50,995 INFO L470 AbstractCegarLoop]: Abstraction has 8490 states and 26377 transitions. [2022-02-15 13:11:50,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 26377 transitions. [2022-02-15 13:11:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:51,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:51,009 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:51,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-02-15 13:11:51,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-02-15 13:11:51,210 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1385764427, now seen corresponding path program 347 times [2022-02-15 13:11:51,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:51,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608681564] [2022-02-15 13:11:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:51,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:51,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:51,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608681564] [2022-02-15 13:11:51,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608681564] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:51,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603176319] [2022-02-15 13:11:51,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:11:51,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:51,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:51,262 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:51,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-02-15 13:11:51,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:11:51,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:51,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:51,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603176319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:51,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:51,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-02-15 13:11:51,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423075450] [2022-02-15 13:11:51,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:51,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:51,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:51,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:51,440 INFO L87 Difference]: Start difference. First operand 8490 states and 26377 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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) [2022-02-15 13:11:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:52,193 INFO L93 Difference]: Finished difference Result 10604 states and 31742 transitions. [2022-02-15 13:11:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:11:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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 24 [2022-02-15 13:11:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:52,253 INFO L225 Difference]: With dead ends: 10604 [2022-02-15 13:11:52,253 INFO L226 Difference]: Without dead ends: 10586 [2022-02-15 13:11:52,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:11:52,253 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 293 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:52,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 176 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2022-02-15 13:11:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 8963. [2022-02-15 13:11:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 3.121513055121625) internal successors, (27975), 8962 states have internal predecessors, (27975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 27975 transitions. [2022-02-15 13:11:52,432 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 27975 transitions. Word has length 24 [2022-02-15 13:11:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:52,432 INFO L470 AbstractCegarLoop]: Abstraction has 8963 states and 27975 transitions. [2022-02-15 13:11:52,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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) [2022-02-15 13:11:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 27975 transitions. [2022-02-15 13:11:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:52,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:52,446 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:52,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:52,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:52,646 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 921173323, now seen corresponding path program 348 times [2022-02-15 13:11:52,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:52,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878591048] [2022-02-15 13:11:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:52,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:52,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:52,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878591048] [2022-02-15 13:11:52,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878591048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:52,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701556833] [2022-02-15 13:11:52,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:11:52,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:52,697 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:52,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-02-15 13:11:52,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:11:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:52,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:52,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:52,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701556833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:52,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:52,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-02-15 13:11:52,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091486518] [2022-02-15 13:11:52,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:52,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:52,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:52,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:52,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:52,871 INFO L87 Difference]: Start difference. First operand 8963 states and 27975 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:11:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:53,837 INFO L93 Difference]: Finished difference Result 9967 states and 30031 transitions. [2022-02-15 13:11:53,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:11:53,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 24 [2022-02-15 13:11:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:53,861 INFO L225 Difference]: With dead ends: 9967 [2022-02-15 13:11:53,861 INFO L226 Difference]: Without dead ends: 9961 [2022-02-15 13:11:53,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 13:11:53,862 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 248 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:53,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 208 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2022-02-15 13:11:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8724. [2022-02-15 13:11:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8724 states, 8723 states have (on average 3.112690588100424) internal successors, (27152), 8723 states have internal predecessors, (27152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 27152 transitions. [2022-02-15 13:11:54,065 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 27152 transitions. Word has length 24 [2022-02-15 13:11:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 8724 states and 27152 transitions. [2022-02-15 13:11:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:11:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 27152 transitions. [2022-02-15 13:11:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:54,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:54,080 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:54,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Ended with exit code 0 [2022-02-15 13:11:54,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:54,280 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 887574095, now seen corresponding path program 349 times [2022-02-15 13:11:54,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:54,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990272151] [2022-02-15 13:11:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:54,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:54,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:54,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990272151] [2022-02-15 13:11:54,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990272151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:54,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903427880] [2022-02-15 13:11:54,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:11:54,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:54,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:54,337 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:54,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-02-15 13:11:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:54,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:54,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:54,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903427880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:54,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:54,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 23 [2022-02-15 13:11:54,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357967230] [2022-02-15 13:11:54,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:54,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:11:54,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:54,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:11:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:11:54,517 INFO L87 Difference]: Start difference. First operand 8724 states and 27152 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-15 13:11:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:55,460 INFO L93 Difference]: Finished difference Result 9884 states and 29758 transitions. [2022-02-15 13:11:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:11:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 24 [2022-02-15 13:11:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:55,483 INFO L225 Difference]: With dead ends: 9884 [2022-02-15 13:11:55,483 INFO L226 Difference]: Without dead ends: 9874 [2022-02-15 13:11:55,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:11:55,484 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 256 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:55,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 214 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2022-02-15 13:11:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8701. [2022-02-15 13:11:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 3.1133333333333333) internal successors, (27086), 8700 states have internal predecessors, (27086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 27086 transitions. [2022-02-15 13:11:55,677 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 27086 transitions. Word has length 24 [2022-02-15 13:11:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:55,677 INFO L470 AbstractCegarLoop]: Abstraction has 8701 states and 27086 transitions. [2022-02-15 13:11:55,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-15 13:11:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 27086 transitions. [2022-02-15 13:11:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:55,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:55,692 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:55,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-02-15 13:11:55,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:55,893 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash -154001973, now seen corresponding path program 350 times [2022-02-15 13:11:55,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:55,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846662847] [2022-02-15 13:11:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:55,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:55,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:55,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846662847] [2022-02-15 13:11:55,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846662847] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:55,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959834965] [2022-02-15 13:11:55,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:11:55,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:55,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:55,955 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:55,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-02-15 13:11:55,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:11:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:55,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:56,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:11:56,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959834965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:56,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:56,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 24 [2022-02-15 13:11:56,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423352523] [2022-02-15 13:11:56,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:56,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:11:56,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:11:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:11:56,138 INFO L87 Difference]: Start difference. First operand 8701 states and 27086 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-02-15 13:11:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:57,050 INFO L93 Difference]: Finished difference Result 9922 states and 29903 transitions. [2022-02-15 13:11:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 13:11:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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 24 [2022-02-15 13:11:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:57,069 INFO L225 Difference]: With dead ends: 9922 [2022-02-15 13:11:57,069 INFO L226 Difference]: Without dead ends: 9904 [2022-02-15 13:11:57,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:11:57,071 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 215 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:57,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 244 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2022-02-15 13:11:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 8685. [2022-02-15 13:11:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 3.1182634730538923) internal successors, (27079), 8684 states have internal predecessors, (27079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 27079 transitions. [2022-02-15 13:11:57,231 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 27079 transitions. Word has length 24 [2022-02-15 13:11:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:57,232 INFO L470 AbstractCegarLoop]: Abstraction has 8685 states and 27079 transitions. [2022-02-15 13:11:57,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-02-15 13:11:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 27079 transitions. [2022-02-15 13:11:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:57,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:57,245 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:57,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:57,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2022-02-15 13:11:57,446 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1916878287, now seen corresponding path program 351 times [2022-02-15 13:11:57,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:57,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962828349] [2022-02-15 13:11:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:57,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:57,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:57,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962828349] [2022-02-15 13:11:57,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962828349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:57,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075705300] [2022-02-15 13:11:57,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:11:57,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:57,521 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:57,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-02-15 13:11:57,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:11:57,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:57,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:57,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:57,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075705300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:57,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:57,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-02-15 13:11:57,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231080987] [2022-02-15 13:11:57,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:57,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:11:57,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:57,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:11:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:11:57,718 INFO L87 Difference]: Start difference. First operand 8685 states and 27079 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:11:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:58,486 INFO L93 Difference]: Finished difference Result 9621 states and 29138 transitions. [2022-02-15 13:11:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:11:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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 24 [2022-02-15 13:11:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:58,504 INFO L225 Difference]: With dead ends: 9621 [2022-02-15 13:11:58,504 INFO L226 Difference]: Without dead ends: 9605 [2022-02-15 13:11:58,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:11:58,505 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:58,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 161 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2022-02-15 13:11:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8716. [2022-02-15 13:11:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 3.119219736087206) internal successors, (27184), 8715 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 27184 transitions. [2022-02-15 13:11:58,666 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 27184 transitions. Word has length 24 [2022-02-15 13:11:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:11:58,666 INFO L470 AbstractCegarLoop]: Abstraction has 8716 states and 27184 transitions. [2022-02-15 13:11:58,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:11:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 27184 transitions. [2022-02-15 13:11:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:11:58,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:11:58,679 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:11:58,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-02-15 13:11:58,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:58,879 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:11:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:11:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1123711993, now seen corresponding path program 352 times [2022-02-15 13:11:58,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:11:58,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088455014] [2022-02-15 13:11:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:11:58,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:11:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:11:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:58,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:11:58,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088455014] [2022-02-15 13:11:58,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088455014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:11:58,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714302674] [2022-02-15 13:11:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:11:58,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:11:58,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:11:58,925 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:11:58,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-02-15 13:11:58,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:11:58,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:11:58,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:11:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:11:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:59,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:11:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:11:59,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714302674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:11:59,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:11:59,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-02-15 13:11:59,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234920147] [2022-02-15 13:11:59,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:11:59,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:11:59,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:11:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:11:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:11:59,102 INFO L87 Difference]: Start difference. First operand 8716 states and 27184 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:11:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:11:59,807 INFO L93 Difference]: Finished difference Result 11348 states and 34100 transitions. [2022-02-15 13:11:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:11:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:11:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:11:59,828 INFO L225 Difference]: With dead ends: 11348 [2022-02-15 13:11:59,828 INFO L226 Difference]: Without dead ends: 11333 [2022-02-15 13:11:59,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:11:59,829 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 313 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:11:59,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 187 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:11:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2022-02-15 13:11:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 9625. [2022-02-15 13:11:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 3.1397547797173733) internal successors, (30217), 9624 states have internal predecessors, (30217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 30217 transitions. [2022-02-15 13:12:00,017 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 30217 transitions. Word has length 24 [2022-02-15 13:12:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:00,017 INFO L470 AbstractCegarLoop]: Abstraction has 9625 states and 30217 transitions. [2022-02-15 13:12:00,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 30217 transitions. [2022-02-15 13:12:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:00,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:00,031 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:00,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:00,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-02-15 13:12:00,231 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1588303097, now seen corresponding path program 353 times [2022-02-15 13:12:00,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:00,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851026710] [2022-02-15 13:12:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:00,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:00,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:00,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851026710] [2022-02-15 13:12:00,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851026710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:00,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453922706] [2022-02-15 13:12:00,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:12:00,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:00,277 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:00,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-02-15 13:12:00,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:12:00,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:00,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:00,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:00,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453922706] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:00,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:00,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-02-15 13:12:00,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444749610] [2022-02-15 13:12:00,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:00,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:00,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:00,448 INFO L87 Difference]: Start difference. First operand 9625 states and 30217 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:12:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:01,552 INFO L93 Difference]: Finished difference Result 10893 states and 32965 transitions. [2022-02-15 13:12:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 13:12:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2022-02-15 13:12:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:01,578 INFO L225 Difference]: With dead ends: 10893 [2022-02-15 13:12:01,578 INFO L226 Difference]: Without dead ends: 10887 [2022-02-15 13:12:01,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 13:12:01,580 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 240 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:01,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 215 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2022-02-15 13:12:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9443. [2022-02-15 13:12:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.133869942808727) internal successors, (29590), 9442 states have internal predecessors, (29590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 29590 transitions. [2022-02-15 13:12:01,796 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 29590 transitions. Word has length 24 [2022-02-15 13:12:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:01,796 INFO L470 AbstractCegarLoop]: Abstraction has 9443 states and 29590 transitions. [2022-02-15 13:12:01,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:12:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 29590 transitions. [2022-02-15 13:12:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:01,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:01,812 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:01,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-02-15 13:12:02,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-02-15 13:12:02,012 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1621902325, now seen corresponding path program 354 times [2022-02-15 13:12:02,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:02,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191683469] [2022-02-15 13:12:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:02,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:02,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:02,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191683469] [2022-02-15 13:12:02,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191683469] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:02,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484646422] [2022-02-15 13:12:02,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:12:02,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:02,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:02,064 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:02,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-02-15 13:12:02,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:12:02,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:02,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:02,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:02,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484646422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:02,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:02,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 23 [2022-02-15 13:12:02,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960931717] [2022-02-15 13:12:02,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:02,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:12:02,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:12:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:12:02,249 INFO L87 Difference]: Start difference. First operand 9443 states and 29590 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-02-15 13:12:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:03,255 INFO L93 Difference]: Finished difference Result 10963 states and 33243 transitions. [2022-02-15 13:12:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:12:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 24 [2022-02-15 13:12:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:03,277 INFO L225 Difference]: With dead ends: 10963 [2022-02-15 13:12:03,277 INFO L226 Difference]: Without dead ends: 10955 [2022-02-15 13:12:03,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 13:12:03,278 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:03,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 237 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2022-02-15 13:12:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 9488. [2022-02-15 13:12:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9488 states, 9487 states have (on average 3.1347106566880996) internal successors, (29739), 9487 states have internal predecessors, (29739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 29739 transitions. [2022-02-15 13:12:03,551 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 29739 transitions. Word has length 24 [2022-02-15 13:12:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:03,551 INFO L470 AbstractCegarLoop]: Abstraction has 9488 states and 29739 transitions. [2022-02-15 13:12:03,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-02-15 13:12:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 29739 transitions. [2022-02-15 13:12:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:03,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:03,567 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:03,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-02-15 13:12:03,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-02-15 13:12:03,768 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1631488903, now seen corresponding path program 355 times [2022-02-15 13:12:03,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:03,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645099898] [2022-02-15 13:12:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:03,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:03,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:03,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645099898] [2022-02-15 13:12:03,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645099898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:03,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360920341] [2022-02-15 13:12:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:12:03,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:03,824 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:03,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-02-15 13:12:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:03,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:03,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:04,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360920341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:04,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:04,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 24 [2022-02-15 13:12:04,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622204631] [2022-02-15 13:12:04,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:04,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:12:04,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:12:04,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:12:04,008 INFO L87 Difference]: Start difference. First operand 9488 states and 29739 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-15 13:12:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:04,922 INFO L93 Difference]: Finished difference Result 11074 states and 33620 transitions. [2022-02-15 13:12:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 13:12:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 24 [2022-02-15 13:12:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:04,950 INFO L225 Difference]: With dead ends: 11074 [2022-02-15 13:12:04,950 INFO L226 Difference]: Without dead ends: 11062 [2022-02-15 13:12:04,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 13:12:04,951 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 237 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:04,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 190 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2022-02-15 13:12:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9716. [2022-02-15 13:12:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9716 states, 9715 states have (on average 3.138548636129696) internal successors, (30491), 9715 states have internal predecessors, (30491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 30491 transitions. [2022-02-15 13:12:05,175 INFO L78 Accepts]: Start accepts. Automaton has 9716 states and 30491 transitions. Word has length 24 [2022-02-15 13:12:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:05,175 INFO L470 AbstractCegarLoop]: Abstraction has 9716 states and 30491 transitions. [2022-02-15 13:12:05,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-15 13:12:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 9716 states and 30491 transitions. [2022-02-15 13:12:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:05,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:05,192 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:05,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-02-15 13:12:05,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:05,392 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash -592598133, now seen corresponding path program 356 times [2022-02-15 13:12:05,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:05,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265817119] [2022-02-15 13:12:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:05,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:05,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:05,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265817119] [2022-02-15 13:12:05,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265817119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:05,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121245523] [2022-02-15 13:12:05,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:12:05,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:05,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:05,454 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:05,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-02-15 13:12:05,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:12:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:05,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:05,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121245523] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:05,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:05,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-02-15 13:12:05,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022636000] [2022-02-15 13:12:05,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:05,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:12:05,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:12:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:12:05,640 INFO L87 Difference]: Start difference. First operand 9716 states and 30491 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:12:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:06,492 INFO L93 Difference]: Finished difference Result 11386 states and 34650 transitions. [2022-02-15 13:12:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 13:12:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 24 [2022-02-15 13:12:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:06,513 INFO L225 Difference]: With dead ends: 11386 [2022-02-15 13:12:06,514 INFO L226 Difference]: Without dead ends: 11370 [2022-02-15 13:12:06,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:12:06,515 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 239 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:06,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 213 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2022-02-15 13:12:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 9979. [2022-02-15 13:12:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 3.1449188214070958) internal successors, (31380), 9978 states have internal predecessors, (31380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 31380 transitions. [2022-02-15 13:12:06,731 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 31380 transitions. Word has length 24 [2022-02-15 13:12:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:06,731 INFO L470 AbstractCegarLoop]: Abstraction has 9979 states and 31380 transitions. [2022-02-15 13:12:06,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:12:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 31380 transitions. [2022-02-15 13:12:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:06,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:06,746 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:06,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-02-15 13:12:06,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-02-15 13:12:06,946 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash -819819513, now seen corresponding path program 357 times [2022-02-15 13:12:06,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:06,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063628599] [2022-02-15 13:12:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:06,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:07,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:07,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063628599] [2022-02-15 13:12:07,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063628599] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:07,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767106452] [2022-02-15 13:12:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:12:07,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:07,022 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:07,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-02-15 13:12:07,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:12:07,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:07,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:07,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:07,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:07,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767106452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:07,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:07,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-02-15 13:12:07,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115063296] [2022-02-15 13:12:07,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:07,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:12:07,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:07,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:12:07,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:12:07,216 INFO L87 Difference]: Start difference. First operand 9979 states and 31380 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:12:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:07,978 INFO L93 Difference]: Finished difference Result 11190 states and 34200 transitions. [2022-02-15 13:12:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:12:07,978 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 24 [2022-02-15 13:12:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:08,005 INFO L225 Difference]: With dead ends: 11190 [2022-02-15 13:12:08,005 INFO L226 Difference]: Without dead ends: 11170 [2022-02-15 13:12:08,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:12:08,006 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 180 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:08,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 147 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11170 states. [2022-02-15 13:12:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11170 to 10023. [2022-02-15 13:12:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10023 states, 10022 states have (on average 3.1446817002594294) internal successors, (31516), 10022 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10023 states to 10023 states and 31516 transitions. [2022-02-15 13:12:08,230 INFO L78 Accepts]: Start accepts. Automaton has 10023 states and 31516 transitions. Word has length 24 [2022-02-15 13:12:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:08,230 INFO L470 AbstractCegarLoop]: Abstraction has 10023 states and 31516 transitions. [2022-02-15 13:12:08,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:12:08,230 INFO L276 IsEmpty]: Start isEmpty. Operand 10023 states and 31516 transitions. [2022-02-15 13:12:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:08,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:08,247 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:08,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:08,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2022-02-15 13:12:08,448 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:08,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1608069685, now seen corresponding path program 358 times [2022-02-15 13:12:08,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:08,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746982912] [2022-02-15 13:12:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:08,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:08,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:08,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746982912] [2022-02-15 13:12:08,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746982912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:08,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652334983] [2022-02-15 13:12:08,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:12:08,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:08,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:08,492 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:08,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-02-15 13:12:08,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:12:08,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:08,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:08,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652334983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:08,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:08,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-02-15 13:12:08,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354526968] [2022-02-15 13:12:08,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:08,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:08,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:08,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:08,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:08,680 INFO L87 Difference]: Start difference. First operand 10023 states and 31516 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:09,506 INFO L93 Difference]: Finished difference Result 14250 states and 43629 transitions. [2022-02-15 13:12:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:12:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:09,542 INFO L225 Difference]: With dead ends: 14250 [2022-02-15 13:12:09,543 INFO L226 Difference]: Without dead ends: 14238 [2022-02-15 13:12:09,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:12:09,543 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 281 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:09,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 291 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14238 states. [2022-02-15 13:12:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14238 to 11906. [2022-02-15 13:12:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11906 states, 11905 states have (on average 3.1850482990340194) internal successors, (37918), 11905 states have internal predecessors, (37918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 37918 transitions. [2022-02-15 13:12:09,836 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 37918 transitions. Word has length 24 [2022-02-15 13:12:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:09,836 INFO L470 AbstractCegarLoop]: Abstraction has 11906 states and 37918 transitions. [2022-02-15 13:12:09,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 37918 transitions. [2022-02-15 13:12:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:09,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:09,857 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:09,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:10,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:10,057 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2072660789, now seen corresponding path program 359 times [2022-02-15 13:12:10,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:10,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595459598] [2022-02-15 13:12:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:10,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:10,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:10,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595459598] [2022-02-15 13:12:10,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595459598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:10,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24372720] [2022-02-15 13:12:10,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:12:10,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:10,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:10,100 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:10,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-02-15 13:12:10,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:12:10,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:10,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:10,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:10,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24372720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:10,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:10,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-02-15 13:12:10,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520374499] [2022-02-15 13:12:10,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:10,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:10,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:10,282 INFO L87 Difference]: Start difference. First operand 11906 states and 37918 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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) [2022-02-15 13:12:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:11,508 INFO L93 Difference]: Finished difference Result 13468 states and 41406 transitions. [2022-02-15 13:12:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-15 13:12:11,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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 24 [2022-02-15 13:12:11,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:11,546 INFO L225 Difference]: With dead ends: 13468 [2022-02-15 13:12:11,547 INFO L226 Difference]: Without dead ends: 13464 [2022-02-15 13:12:11,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2022-02-15 13:12:11,549 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 293 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:11,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 193 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13464 states. [2022-02-15 13:12:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13464 to 11668. [2022-02-15 13:12:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11668 states, 11667 states have (on average 3.1784520442273076) internal successors, (37083), 11667 states have internal predecessors, (37083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 37083 transitions. [2022-02-15 13:12:11,869 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 37083 transitions. Word has length 24 [2022-02-15 13:12:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:11,869 INFO L470 AbstractCegarLoop]: Abstraction has 11668 states and 37083 transitions. [2022-02-15 13:12:11,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 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) [2022-02-15 13:12:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 37083 transitions. [2022-02-15 13:12:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:11,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:11,890 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:11,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-02-15 13:12:12,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:12,091 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:12,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2106260017, now seen corresponding path program 360 times [2022-02-15 13:12:12,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:12,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549771353] [2022-02-15 13:12:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:12,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:12,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:12,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549771353] [2022-02-15 13:12:12,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549771353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:12,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225914206] [2022-02-15 13:12:12,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:12:12,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:12,138 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:12,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-02-15 13:12:12,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:12:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:12,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:12,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225914206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:12,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:12,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 23 [2022-02-15 13:12:12,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252700142] [2022-02-15 13:12:12,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:12,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:12:12,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:12:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:12:12,325 INFO L87 Difference]: Start difference. First operand 11668 states and 37083 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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) [2022-02-15 13:12:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:13,442 INFO L93 Difference]: Finished difference Result 13667 states and 42198 transitions. [2022-02-15 13:12:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 13:12:13,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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 24 [2022-02-15 13:12:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:13,473 INFO L225 Difference]: With dead ends: 13667 [2022-02-15 13:12:13,473 INFO L226 Difference]: Without dead ends: 13659 [2022-02-15 13:12:13,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 13:12:13,474 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 306 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:13,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 199 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2022-02-15 13:12:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 11875. [2022-02-15 13:12:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11875 states, 11874 states have (on average 3.1847734546067037) internal successors, (37816), 11874 states have internal predecessors, (37816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 37816 transitions. [2022-02-15 13:12:13,737 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 37816 transitions. Word has length 24 [2022-02-15 13:12:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:13,737 INFO L470 AbstractCegarLoop]: Abstraction has 11875 states and 37816 transitions. [2022-02-15 13:12:13,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 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) [2022-02-15 13:12:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 37816 transitions. [2022-02-15 13:12:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:13,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:13,756 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:13,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:13,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:13,957 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1147131211, now seen corresponding path program 361 times [2022-02-15 13:12:13,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:13,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690229320] [2022-02-15 13:12:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:13,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:14,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:14,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690229320] [2022-02-15 13:12:14,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690229320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:14,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011796895] [2022-02-15 13:12:14,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:12:14,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:14,010 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:14,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-02-15 13:12:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:14,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:14,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:14,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011796895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:14,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:14,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 24 [2022-02-15 13:12:14,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838278939] [2022-02-15 13:12:14,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:14,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:12:14,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:12:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:12:14,220 INFO L87 Difference]: Start difference. First operand 11875 states and 37816 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2022-02-15 13:12:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:15,292 INFO L93 Difference]: Finished difference Result 14012 states and 43421 transitions. [2022-02-15 13:12:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:12:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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 24 [2022-02-15 13:12:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:15,332 INFO L225 Difference]: With dead ends: 14012 [2022-02-15 13:12:15,332 INFO L226 Difference]: Without dead ends: 14000 [2022-02-15 13:12:15,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 13:12:15,334 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 258 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:15,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 233 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2022-02-15 13:12:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 12230. [2022-02-15 13:12:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12230 states, 12229 states have (on average 3.1900400686891817) internal successors, (39011), 12229 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 39011 transitions. [2022-02-15 13:12:15,631 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 39011 transitions. Word has length 24 [2022-02-15 13:12:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:15,631 INFO L470 AbstractCegarLoop]: Abstraction has 12230 states and 39011 transitions. [2022-02-15 13:12:15,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 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) [2022-02-15 13:12:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 39011 transitions. [2022-02-15 13:12:15,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:15,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:15,653 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:15,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-02-15 13:12:15,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:15,853 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1076955825, now seen corresponding path program 362 times [2022-02-15 13:12:15,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:15,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944449358] [2022-02-15 13:12:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:15,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:15,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:15,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944449358] [2022-02-15 13:12:15,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944449358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:15,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640360564] [2022-02-15 13:12:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:12:15,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:15,912 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:15,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-02-15 13:12:15,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:12:15,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:15,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:16,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:16,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640360564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:16,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:16,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 25 [2022-02-15 13:12:16,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319482000] [2022-02-15 13:12:16,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:16,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:12:16,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:16,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:12:16,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:12:16,109 INFO L87 Difference]: Start difference. First operand 12230 states and 39011 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-15 13:12:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:17,078 INFO L93 Difference]: Finished difference Result 14528 states and 45137 transitions. [2022-02-15 13:12:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:12:17,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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 24 [2022-02-15 13:12:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:17,120 INFO L225 Difference]: With dead ends: 14528 [2022-02-15 13:12:17,120 INFO L226 Difference]: Without dead ends: 14512 [2022-02-15 13:12:17,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 13:12:17,121 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 228 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:17,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 220 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2022-02-15 13:12:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 13019. [2022-02-15 13:12:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13019 states, 13018 states have (on average 3.197649408511292) internal successors, (41627), 13018 states have internal predecessors, (41627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 41627 transitions. [2022-02-15 13:12:17,467 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 41627 transitions. Word has length 24 [2022-02-15 13:12:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:17,467 INFO L470 AbstractCegarLoop]: Abstraction has 13019 states and 41627 transitions. [2022-02-15 13:12:17,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-15 13:12:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 41627 transitions. [2022-02-15 13:12:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:17,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:17,493 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:17,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-02-15 13:12:17,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-02-15 13:12:17,694 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:17,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1304177205, now seen corresponding path program 363 times [2022-02-15 13:12:17,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:17,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523799110] [2022-02-15 13:12:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:17,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:17,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:17,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523799110] [2022-02-15 13:12:17,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523799110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:17,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949146832] [2022-02-15 13:12:17,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:12:17,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:17,759 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:17,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-02-15 13:12:17,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:12:17,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:17,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:17,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:17,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949146832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:17,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:17,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 26 [2022-02-15 13:12:17,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554453347] [2022-02-15 13:12:17,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:17,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:12:17,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:17,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:12:17,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:12:17,962 INFO L87 Difference]: Start difference. First operand 13019 states and 41627 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-15 13:12:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:18,868 INFO L93 Difference]: Finished difference Result 15354 states and 47888 transitions. [2022-02-15 13:12:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 13:12:18,868 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 24 [2022-02-15 13:12:18,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:18,911 INFO L225 Difference]: With dead ends: 15354 [2022-02-15 13:12:18,912 INFO L226 Difference]: Without dead ends: 15334 [2022-02-15 13:12:18,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:12:18,913 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 282 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:18,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 204 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2022-02-15 13:12:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 13814. [2022-02-15 13:12:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13814 states, 13813 states have (on average 3.2055310215014843) internal successors, (44278), 13813 states have internal predecessors, (44278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13814 states to 13814 states and 44278 transitions. [2022-02-15 13:12:19,201 INFO L78 Accepts]: Start accepts. Automaton has 13814 states and 44278 transitions. Word has length 24 [2022-02-15 13:12:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:19,201 INFO L470 AbstractCegarLoop]: Abstraction has 13814 states and 44278 transitions. [2022-02-15 13:12:19,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-15 13:12:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13814 states and 44278 transitions. [2022-02-15 13:12:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:19,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:19,265 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:19,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-02-15 13:12:19,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-02-15 13:12:19,465 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:19,466 INFO L85 PathProgramCache]: Analyzing trace with hash 241894607, now seen corresponding path program 364 times [2022-02-15 13:12:19,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:19,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317201321] [2022-02-15 13:12:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:19,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:19,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:19,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317201321] [2022-02-15 13:12:19,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317201321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:19,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57820422] [2022-02-15 13:12:19,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:12:19,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:19,534 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:19,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-02-15 13:12:19,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:12:19,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:19,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:19,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:19,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57820422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:19,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:19,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-02-15 13:12:19,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696252093] [2022-02-15 13:12:19,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:19,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:12:19,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:12:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:12:19,735 INFO L87 Difference]: Start difference. First operand 13814 states and 44278 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-15 13:12:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:20,502 INFO L93 Difference]: Finished difference Result 15273 states and 47830 transitions. [2022-02-15 13:12:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:12:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 24 [2022-02-15 13:12:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:20,536 INFO L225 Difference]: With dead ends: 15273 [2022-02-15 13:12:20,536 INFO L226 Difference]: Without dead ends: 15249 [2022-02-15 13:12:20,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 13:12:20,537 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:20,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 189 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2022-02-15 13:12:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 13872. [2022-02-15 13:12:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13872 states, 13871 states have (on average 3.205248359887535) internal successors, (44460), 13871 states have internal predecessors, (44460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 44460 transitions. [2022-02-15 13:12:20,817 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 44460 transitions. Word has length 24 [2022-02-15 13:12:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:20,818 INFO L470 AbstractCegarLoop]: Abstraction has 13872 states and 44460 transitions. [2022-02-15 13:12:20,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-15 13:12:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 44460 transitions. [2022-02-15 13:12:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:20,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:20,841 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:20,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:21,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:21,041 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash -569197233, now seen corresponding path program 365 times [2022-02-15 13:12:21,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:21,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853107410] [2022-02-15 13:12:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:21,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:21,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:21,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853107410] [2022-02-15 13:12:21,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853107410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:21,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960471782] [2022-02-15 13:12:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:12:21,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:21,107 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:21,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-02-15 13:12:21,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:12:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:21,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:21,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960471782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:21,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:21,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-02-15 13:12:21,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423105413] [2022-02-15 13:12:21,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:21,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:12:21,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:12:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:12:21,245 INFO L87 Difference]: Start difference. First operand 13872 states and 44460 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:21,421 INFO L93 Difference]: Finished difference Result 16092 states and 50859 transitions. [2022-02-15 13:12:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:12:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:21,454 INFO L225 Difference]: With dead ends: 16092 [2022-02-15 13:12:21,455 INFO L226 Difference]: Without dead ends: 16092 [2022-02-15 13:12:21,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:12:21,455 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 101 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:21,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 90 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:12:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2022-02-15 13:12:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 13964. [2022-02-15 13:12:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13964 states, 13963 states have (on average 3.2041108644274154) internal successors, (44739), 13963 states have internal predecessors, (44739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 44739 transitions. [2022-02-15 13:12:21,779 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 44739 transitions. Word has length 24 [2022-02-15 13:12:21,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:21,779 INFO L470 AbstractCegarLoop]: Abstraction has 13964 states and 44739 transitions. [2022-02-15 13:12:21,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 44739 transitions. [2022-02-15 13:12:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:21,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:21,802 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:21,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-02-15 13:12:22,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-02-15 13:12:22,002 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:22,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash 237042051, now seen corresponding path program 366 times [2022-02-15 13:12:22,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:22,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443726924] [2022-02-15 13:12:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:22,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:22,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:22,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443726924] [2022-02-15 13:12:22,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443726924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:22,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876366774] [2022-02-15 13:12:22,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:12:22,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:22,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:22,068 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:22,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-02-15 13:12:22,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:12:22,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:22,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:22,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:22,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876366774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:22,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:22,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:22,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164529918] [2022-02-15 13:12:22,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:22,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:22,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:22,216 INFO L87 Difference]: Start difference. First operand 13964 states and 44739 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:22,475 INFO L93 Difference]: Finished difference Result 14987 states and 47521 transitions. [2022-02-15 13:12:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:12:22,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:22,506 INFO L225 Difference]: With dead ends: 14987 [2022-02-15 13:12:22,506 INFO L226 Difference]: Without dead ends: 14987 [2022-02-15 13:12:22,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:12:22,506 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:22,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 98 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:12:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2022-02-15 13:12:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 14007. [2022-02-15 13:12:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14007 states, 14006 states have (on average 3.203484221048122) internal successors, (44868), 14006 states have internal predecessors, (44868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 44868 transitions. [2022-02-15 13:12:22,784 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 44868 transitions. Word has length 24 [2022-02-15 13:12:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:22,784 INFO L470 AbstractCegarLoop]: Abstraction has 14007 states and 44868 transitions. [2022-02-15 13:12:22,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 44868 transitions. [2022-02-15 13:12:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:22,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:22,805 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:22,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-02-15 13:12:23,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:23,006 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1085664523, now seen corresponding path program 367 times [2022-02-15 13:12:23,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:23,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664520493] [2022-02-15 13:12:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:23,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:23,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:23,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664520493] [2022-02-15 13:12:23,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664520493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:23,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966354224] [2022-02-15 13:12:23,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:12:23,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:23,079 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:23,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-02-15 13:12:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:23,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:23,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:23,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966354224] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:23,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:23,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:23,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066856839] [2022-02-15 13:12:23,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:23,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:23,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:23,262 INFO L87 Difference]: Start difference. First operand 14007 states and 44868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:23,648 INFO L93 Difference]: Finished difference Result 15501 states and 48982 transitions. [2022-02-15 13:12:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:12:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:23,682 INFO L225 Difference]: With dead ends: 15501 [2022-02-15 13:12:23,682 INFO L226 Difference]: Without dead ends: 15501 [2022-02-15 13:12:23,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:12:23,683 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:23,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 99 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:12:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2022-02-15 13:12:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 14056. [2022-02-15 13:12:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14056 states, 14055 states have (on average 3.2027748132337246) internal successors, (45015), 14055 states have internal predecessors, (45015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 45015 transitions. [2022-02-15 13:12:24,000 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 45015 transitions. Word has length 24 [2022-02-15 13:12:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:24,000 INFO L470 AbstractCegarLoop]: Abstraction has 14056 states and 45015 transitions. [2022-02-15 13:12:24,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 45015 transitions. [2022-02-15 13:12:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:24,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:24,023 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:24,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-02-15 13:12:24,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:24,224 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1519359869, now seen corresponding path program 368 times [2022-02-15 13:12:24,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:24,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32991859] [2022-02-15 13:12:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:24,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:24,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:24,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32991859] [2022-02-15 13:12:24,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32991859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:24,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155904609] [2022-02-15 13:12:24,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:12:24,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:24,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:24,289 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:24,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-02-15 13:12:24,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:12:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:24,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155904609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:24,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:24,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:24,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063461146] [2022-02-15 13:12:24,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:24,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:24,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:24,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:24,437 INFO L87 Difference]: Start difference. First operand 14056 states and 45015 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:25,011 INFO L93 Difference]: Finished difference Result 15602 states and 49176 transitions. [2022-02-15 13:12:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:12:25,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:25,044 INFO L225 Difference]: With dead ends: 15602 [2022-02-15 13:12:25,044 INFO L226 Difference]: Without dead ends: 15602 [2022-02-15 13:12:25,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:12:25,045 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:25,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 138 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2022-02-15 13:12:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 14172. [2022-02-15 13:12:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14172 states, 14171 states have (on average 3.2011149530731777) internal successors, (45363), 14171 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 45363 transitions. [2022-02-15 13:12:25,418 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 45363 transitions. Word has length 24 [2022-02-15 13:12:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:25,418 INFO L470 AbstractCegarLoop]: Abstraction has 14172 states and 45363 transitions. [2022-02-15 13:12:25,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:25,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 45363 transitions. [2022-02-15 13:12:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:25,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:25,440 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:25,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2022-02-15 13:12:25,643 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash -633561589, now seen corresponding path program 369 times [2022-02-15 13:12:25,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:25,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899910212] [2022-02-15 13:12:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:25,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:25,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:25,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899910212] [2022-02-15 13:12:25,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899910212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:25,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64812678] [2022-02-15 13:12:25,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:12:25,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:25,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:25,706 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:25,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-02-15 13:12:25,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:12:25,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:25,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:25,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64812678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:25,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:25,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:25,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507598482] [2022-02-15 13:12:25,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:25,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:25,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:25,852 INFO L87 Difference]: Start difference. First operand 14172 states and 45363 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:26,628 INFO L93 Difference]: Finished difference Result 15707 states and 49378 transitions. [2022-02-15 13:12:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:12:26,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:26,659 INFO L225 Difference]: With dead ends: 15707 [2022-02-15 13:12:26,659 INFO L226 Difference]: Without dead ends: 15707 [2022-02-15 13:12:26,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1756, Invalid=3500, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:12:26,660 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:26,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 220 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2022-02-15 13:12:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 14281. [2022-02-15 13:12:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14281 states, 14280 states have (on average 3.1997198879551823) internal successors, (45692), 14280 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14281 states to 14281 states and 45692 transitions. [2022-02-15 13:12:26,961 INFO L78 Accepts]: Start accepts. Automaton has 14281 states and 45692 transitions. Word has length 24 [2022-02-15 13:12:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:26,962 INFO L470 AbstractCegarLoop]: Abstraction has 14281 states and 45692 transitions. [2022-02-15 13:12:26,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 14281 states and 45692 transitions. [2022-02-15 13:12:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:26,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:26,985 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:27,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:27,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:27,186 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:27,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1473222531, now seen corresponding path program 370 times [2022-02-15 13:12:27,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:27,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515741947] [2022-02-15 13:12:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:27,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:27,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:27,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515741947] [2022-02-15 13:12:27,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515741947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:27,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956549578] [2022-02-15 13:12:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:12:27,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:27,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:27,253 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:27,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-02-15 13:12:27,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:12:27,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:27,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:27,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956549578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:27,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:27,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:27,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990352379] [2022-02-15 13:12:27,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:27,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:27,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:27,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:27,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:27,403 INFO L87 Difference]: Start difference. First operand 14281 states and 45692 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:28,290 INFO L93 Difference]: Finished difference Result 15913 states and 49910 transitions. [2022-02-15 13:12:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:12:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:28,325 INFO L225 Difference]: With dead ends: 15913 [2022-02-15 13:12:28,325 INFO L226 Difference]: Without dead ends: 15913 [2022-02-15 13:12:28,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2091, Invalid=4071, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:12:28,326 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 163 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:28,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 315 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:12:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2022-02-15 13:12:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 14413. [2022-02-15 13:12:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 3.1991396058839854) internal successors, (46106), 14412 states have internal predecessors, (46106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 46106 transitions. [2022-02-15 13:12:28,655 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 46106 transitions. Word has length 24 [2022-02-15 13:12:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:28,655 INFO L470 AbstractCegarLoop]: Abstraction has 14413 states and 46106 transitions. [2022-02-15 13:12:28,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 46106 transitions. [2022-02-15 13:12:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:28,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:28,678 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:28,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-02-15 13:12:28,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable383 [2022-02-15 13:12:28,879 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:28,879 INFO L85 PathProgramCache]: Analyzing trace with hash -675574005, now seen corresponding path program 371 times [2022-02-15 13:12:28,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:28,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243428164] [2022-02-15 13:12:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:28,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:28,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:28,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243428164] [2022-02-15 13:12:28,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243428164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:28,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765541740] [2022-02-15 13:12:28,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:12:28,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:28,951 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:28,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-02-15 13:12:28,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:12:28,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:28,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:29,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:29,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765541740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:29,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:29,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:29,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208626256] [2022-02-15 13:12:29,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:29,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:29,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:29,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:29,103 INFO L87 Difference]: Start difference. First operand 14413 states and 46106 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:30,001 INFO L93 Difference]: Finished difference Result 16226 states and 50863 transitions. [2022-02-15 13:12:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:12:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:30,044 INFO L225 Difference]: With dead ends: 16226 [2022-02-15 13:12:30,045 INFO L226 Difference]: Without dead ends: 16226 [2022-02-15 13:12:30,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 13:12:30,046 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 235 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:30,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 242 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:12:30,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16226 states. [2022-02-15 13:12:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16226 to 14455. [2022-02-15 13:12:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14455 states, 14454 states have (on average 3.204649232046492) internal successors, (46320), 14454 states have internal predecessors, (46320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 46320 transitions. [2022-02-15 13:12:30,400 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 46320 transitions. Word has length 24 [2022-02-15 13:12:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:30,400 INFO L470 AbstractCegarLoop]: Abstraction has 14455 states and 46320 transitions. [2022-02-15 13:12:30,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 46320 transitions. [2022-02-15 13:12:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:30,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:30,429 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:30,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:30,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:30,629 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash -104119199, now seen corresponding path program 372 times [2022-02-15 13:12:30,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:30,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333161176] [2022-02-15 13:12:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:30,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:30,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:30,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333161176] [2022-02-15 13:12:30,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333161176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:30,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753938710] [2022-02-15 13:12:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:12:30,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:30,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:30,693 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:30,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-02-15 13:12:30,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:12:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:30,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:30,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753938710] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:30,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:30,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:30,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028150065] [2022-02-15 13:12:30,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:30,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:30,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:30,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:30,845 INFO L87 Difference]: Start difference. First operand 14455 states and 46320 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:31,711 INFO L93 Difference]: Finished difference Result 15474 states and 48762 transitions. [2022-02-15 13:12:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 13:12:31,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:31,743 INFO L225 Difference]: With dead ends: 15474 [2022-02-15 13:12:31,743 INFO L226 Difference]: Without dead ends: 15468 [2022-02-15 13:12:31,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 13:12:31,745 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 171 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:31,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 203 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:12:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15468 states. [2022-02-15 13:12:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15468 to 13787. [2022-02-15 13:12:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 13786 states have (on average 3.198752357464094) internal successors, (44098), 13786 states have internal predecessors, (44098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 44098 transitions. [2022-02-15 13:12:32,025 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 44098 transitions. Word has length 24 [2022-02-15 13:12:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:32,025 INFO L470 AbstractCegarLoop]: Abstraction has 13787 states and 44098 transitions. [2022-02-15 13:12:32,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 44098 transitions. [2022-02-15 13:12:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:32,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:32,047 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:32,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-02-15 13:12:32,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:32,248 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2035690745, now seen corresponding path program 373 times [2022-02-15 13:12:32,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:32,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318478811] [2022-02-15 13:12:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:32,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:32,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:32,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318478811] [2022-02-15 13:12:32,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318478811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:32,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559860516] [2022-02-15 13:12:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:12:32,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:32,312 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:32,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-02-15 13:12:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:32,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:32,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559860516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:32,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:32,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:32,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846219483] [2022-02-15 13:12:32,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:32,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:32,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:32,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:32,474 INFO L87 Difference]: Start difference. First operand 13787 states and 44098 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:33,141 INFO L93 Difference]: Finished difference Result 17863 states and 56145 transitions. [2022-02-15 13:12:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:12:33,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:33,180 INFO L225 Difference]: With dead ends: 17863 [2022-02-15 13:12:33,181 INFO L226 Difference]: Without dead ends: 17848 [2022-02-15 13:12:33,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:12:33,181 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 337 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:33,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 129 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17848 states. [2022-02-15 13:12:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17848 to 15969. [2022-02-15 13:12:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 15968 states have (on average 3.2116107214428857) internal successors, (51283), 15968 states have internal predecessors, (51283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 51283 transitions. [2022-02-15 13:12:33,554 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 51283 transitions. Word has length 24 [2022-02-15 13:12:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:33,554 INFO L470 AbstractCegarLoop]: Abstraction has 15969 states and 51283 transitions. [2022-02-15 13:12:33,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 51283 transitions. [2022-02-15 13:12:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:33,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:33,578 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:33,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-02-15 13:12:33,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-02-15 13:12:33,779 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:33,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1794685447, now seen corresponding path program 374 times [2022-02-15 13:12:33,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:33,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176708639] [2022-02-15 13:12:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:33,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:33,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:33,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176708639] [2022-02-15 13:12:33,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176708639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:33,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847496423] [2022-02-15 13:12:33,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:12:33,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:33,850 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:33,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-02-15 13:12:33,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:12:33,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:33,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:33,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:34,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847496423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:34,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:34,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:34,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444850819] [2022-02-15 13:12:34,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:34,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:34,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:34,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:34,012 INFO L87 Difference]: Start difference. First operand 15969 states and 51283 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:34,768 INFO L93 Difference]: Finished difference Result 17633 states and 55417 transitions. [2022-02-15 13:12:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:12:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:34,822 INFO L225 Difference]: With dead ends: 17633 [2022-02-15 13:12:34,822 INFO L226 Difference]: Without dead ends: 17629 [2022-02-15 13:12:34,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:12:34,824 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 262 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:34,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 170 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2022-02-15 13:12:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 15243. [2022-02-15 13:12:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15243 states, 15242 states have (on average 3.1953811835717096) internal successors, (48704), 15242 states have internal predecessors, (48704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 48704 transitions. [2022-02-15 13:12:35,219 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 48704 transitions. Word has length 24 [2022-02-15 13:12:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:35,219 INFO L470 AbstractCegarLoop]: Abstraction has 15243 states and 48704 transitions. [2022-02-15 13:12:35,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 48704 transitions. [2022-02-15 13:12:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:35,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:35,250 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:35,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-02-15 13:12:35,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-02-15 13:12:35,450 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1761086219, now seen corresponding path program 375 times [2022-02-15 13:12:35,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:35,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111944862] [2022-02-15 13:12:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:35,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:35,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:35,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111944862] [2022-02-15 13:12:35,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111944862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:35,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521173128] [2022-02-15 13:12:35,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:12:35,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:35,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:35,516 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:35,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-02-15 13:12:35,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:12:35,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:35,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:35,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:35,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521173128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:35,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:35,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:35,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543448997] [2022-02-15 13:12:35,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:35,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:35,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:35,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:35,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:35,679 INFO L87 Difference]: Start difference. First operand 15243 states and 48704 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:36,425 INFO L93 Difference]: Finished difference Result 17307 states and 54169 transitions. [2022-02-15 13:12:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:12:36,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:36,473 INFO L225 Difference]: With dead ends: 17307 [2022-02-15 13:12:36,473 INFO L226 Difference]: Without dead ends: 17299 [2022-02-15 13:12:36,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:12:36,474 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 351 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:36,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 121 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2022-02-15 13:12:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 15525. [2022-02-15 13:12:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15525 states, 15524 states have (on average 3.1944730739500127) internal successors, (49591), 15524 states have internal predecessors, (49591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 49591 transitions. [2022-02-15 13:12:36,828 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 49591 transitions. Word has length 24 [2022-02-15 13:12:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:36,828 INFO L470 AbstractCegarLoop]: Abstraction has 15525 states and 49591 transitions. [2022-02-15 13:12:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 49591 transitions. [2022-02-15 13:12:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:36,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:36,859 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:36,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-02-15 13:12:37,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-02-15 13:12:37,060 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash 719510151, now seen corresponding path program 376 times [2022-02-15 13:12:37,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:37,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428235868] [2022-02-15 13:12:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:37,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:37,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:37,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428235868] [2022-02-15 13:12:37,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428235868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:37,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266311111] [2022-02-15 13:12:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:12:37,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:37,128 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:37,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-02-15 13:12:37,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:12:37,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:37,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:37,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:37,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266311111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:37,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:37,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:37,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784946513] [2022-02-15 13:12:37,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:37,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:37,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:37,290 INFO L87 Difference]: Start difference. First operand 15525 states and 49591 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:37,918 INFO L93 Difference]: Finished difference Result 17843 states and 55959 transitions. [2022-02-15 13:12:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:12:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:37,971 INFO L225 Difference]: With dead ends: 17843 [2022-02-15 13:12:37,971 INFO L226 Difference]: Without dead ends: 17831 [2022-02-15 13:12:37,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:12:37,972 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 372 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:37,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 126 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2022-02-15 13:12:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 15785. [2022-02-15 13:12:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15785 states, 15784 states have (on average 3.192663456664977) internal successors, (50393), 15784 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15785 states to 15785 states and 50393 transitions. [2022-02-15 13:12:38,466 INFO L78 Accepts]: Start accepts. Automaton has 15785 states and 50393 transitions. Word has length 24 [2022-02-15 13:12:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:38,466 INFO L470 AbstractCegarLoop]: Abstraction has 15785 states and 50393 transitions. [2022-02-15 13:12:38,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15785 states and 50393 transitions. [2022-02-15 13:12:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:38,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:38,499 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:38,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-02-15 13:12:38,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-02-15 13:12:38,699 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1504576885, now seen corresponding path program 377 times [2022-02-15 13:12:38,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:38,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248828262] [2022-02-15 13:12:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:38,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:38,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:38,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248828262] [2022-02-15 13:12:38,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248828262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:38,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028009013] [2022-02-15 13:12:38,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:12:38,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:38,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:38,768 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:38,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-02-15 13:12:38,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:12:38,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:38,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:38,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028009013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:38,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:38,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:38,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030219621] [2022-02-15 13:12:38,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:38,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:38,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:38,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:38,935 INFO L87 Difference]: Start difference. First operand 15785 states and 50393 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:39,543 INFO L93 Difference]: Finished difference Result 18546 states and 58331 transitions. [2022-02-15 13:12:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:12:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:39,602 INFO L225 Difference]: With dead ends: 18546 [2022-02-15 13:12:39,602 INFO L226 Difference]: Without dead ends: 18530 [2022-02-15 13:12:39,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:12:39,603 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 272 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:39,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 131 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2022-02-15 13:12:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 15941. [2022-02-15 13:12:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15941 states, 15940 states have (on average 3.1888331242158094) internal successors, (50830), 15940 states have internal predecessors, (50830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15941 states to 15941 states and 50830 transitions. [2022-02-15 13:12:40,025 INFO L78 Accepts]: Start accepts. Automaton has 15941 states and 50830 transitions. Word has length 24 [2022-02-15 13:12:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:40,025 INFO L470 AbstractCegarLoop]: Abstraction has 15941 states and 50830 transitions. [2022-02-15 13:12:40,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 15941 states and 50830 transitions. [2022-02-15 13:12:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:40,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:40,056 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:40,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:40,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2022-02-15 13:12:40,256 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1731798265, now seen corresponding path program 378 times [2022-02-15 13:12:40,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:40,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261578940] [2022-02-15 13:12:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:40,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:40,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:40,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261578940] [2022-02-15 13:12:40,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261578940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:40,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927203929] [2022-02-15 13:12:40,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:12:40,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:40,322 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:40,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-02-15 13:12:40,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:12:40,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:40,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:40,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927203929] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:40,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:40,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:40,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417535269] [2022-02-15 13:12:40,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:40,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:40,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:40,485 INFO L87 Difference]: Start difference. First operand 15941 states and 50830 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:41,028 INFO L93 Difference]: Finished difference Result 18841 states and 59191 transitions. [2022-02-15 13:12:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:12:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:41,078 INFO L225 Difference]: With dead ends: 18841 [2022-02-15 13:12:41,078 INFO L226 Difference]: Without dead ends: 18821 [2022-02-15 13:12:41,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:12:41,079 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 176 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:41,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 161 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:12:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2022-02-15 13:12:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 15970. [2022-02-15 13:12:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1873003945143714) internal successors, (50898), 15969 states have internal predecessors, (50898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50898 transitions. [2022-02-15 13:12:41,464 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50898 transitions. Word has length 24 [2022-02-15 13:12:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:41,464 INFO L470 AbstractCegarLoop]: Abstraction has 15970 states and 50898 transitions. [2022-02-15 13:12:41,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50898 transitions. [2022-02-15 13:12:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:41,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:41,489 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:41,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-02-15 13:12:41,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:41,689 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash -185726453, now seen corresponding path program 379 times [2022-02-15 13:12:41,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:41,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38630332] [2022-02-15 13:12:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:41,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:41,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:41,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38630332] [2022-02-15 13:12:41,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38630332] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:41,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851892707] [2022-02-15 13:12:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:12:41,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:41,754 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:41,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-02-15 13:12:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:41,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:41,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:41,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851892707] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:41,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:41,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-02-15 13:12:41,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701151201] [2022-02-15 13:12:41,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:41,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:41,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:41,914 INFO L87 Difference]: Start difference. First operand 15970 states and 50898 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:42,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:42,288 INFO L93 Difference]: Finished difference Result 17288 states and 54299 transitions. [2022-02-15 13:12:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:12:42,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:42,326 INFO L225 Difference]: With dead ends: 17288 [2022-02-15 13:12:42,326 INFO L226 Difference]: Without dead ends: 17276 [2022-02-15 13:12:42,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:12:42,327 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:42,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 124 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:12:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2022-02-15 13:12:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15970. [2022-02-15 13:12:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.186924666541424) internal successors, (50892), 15969 states have internal predecessors, (50892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50892 transitions. [2022-02-15 13:12:42,636 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50892 transitions. Word has length 24 [2022-02-15 13:12:42,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:42,636 INFO L470 AbstractCegarLoop]: Abstraction has 15970 states and 50892 transitions. [2022-02-15 13:12:42,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50892 transitions. [2022-02-15 13:12:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:42,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:42,661 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:42,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-02-15 13:12:42,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:42,862 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash -195198201, now seen corresponding path program 380 times [2022-02-15 13:12:42,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:42,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251934202] [2022-02-15 13:12:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:42,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:42,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:42,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251934202] [2022-02-15 13:12:42,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251934202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:42,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014498903] [2022-02-15 13:12:42,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:12:42,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:42,928 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:42,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-02-15 13:12:42,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:12:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:42,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:43,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:43,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014498903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:43,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:43,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-02-15 13:12:43,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208950763] [2022-02-15 13:12:43,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:12:43,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:12:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:12:43,081 INFO L87 Difference]: Start difference. First operand 15970 states and 50892 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:43,293 INFO L93 Difference]: Finished difference Result 17070 states and 53913 transitions. [2022-02-15 13:12:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:12:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:43,346 INFO L225 Difference]: With dead ends: 17070 [2022-02-15 13:12:43,346 INFO L226 Difference]: Without dead ends: 17056 [2022-02-15 13:12:43,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:12:43,346 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:43,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 101 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:12:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2022-02-15 13:12:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 15970. [2022-02-15 13:12:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1868620452125995) internal successors, (50891), 15969 states have internal predecessors, (50891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50891 transitions. [2022-02-15 13:12:43,809 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50891 transitions. Word has length 24 [2022-02-15 13:12:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:43,810 INFO L470 AbstractCegarLoop]: Abstraction has 15970 states and 50891 transitions. [2022-02-15 13:12:43,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50891 transitions. [2022-02-15 13:12:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:43,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:43,838 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:43,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-02-15 13:12:44,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:44,038 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:44,038 INFO L85 PathProgramCache]: Analyzing trace with hash -539343921, now seen corresponding path program 381 times [2022-02-15 13:12:44,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:44,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506100080] [2022-02-15 13:12:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:44,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:44,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:44,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506100080] [2022-02-15 13:12:44,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506100080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:44,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289819027] [2022-02-15 13:12:44,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:12:44,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:44,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:44,103 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:44,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-02-15 13:12:44,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:12:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:44,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:44,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289819027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:44,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:44,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-02-15 13:12:44,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416791962] [2022-02-15 13:12:44,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:44,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:12:44,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:12:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:12:44,267 INFO L87 Difference]: Start difference. First operand 15970 states and 50891 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:12:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:44,878 INFO L93 Difference]: Finished difference Result 17305 states and 54554 transitions. [2022-02-15 13:12:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:12:44,878 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 24 [2022-02-15 13:12:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:44,930 INFO L225 Difference]: With dead ends: 17305 [2022-02-15 13:12:44,930 INFO L226 Difference]: Without dead ends: 17305 [2022-02-15 13:12:44,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:12:44,930 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 109 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:44,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 161 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17305 states. [2022-02-15 13:12:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17305 to 16020. [2022-02-15 13:12:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16020 states, 16019 states have (on average 3.1862787939322055) internal successors, (51041), 16019 states have internal predecessors, (51041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16020 states to 16020 states and 51041 transitions. [2022-02-15 13:12:45,329 INFO L78 Accepts]: Start accepts. Automaton has 16020 states and 51041 transitions. Word has length 24 [2022-02-15 13:12:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:45,329 INFO L470 AbstractCegarLoop]: Abstraction has 16020 states and 51041 transitions. [2022-02-15 13:12:45,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:12:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16020 states and 51041 transitions. [2022-02-15 13:12:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:45,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:45,360 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:45,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-02-15 13:12:45,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:45,561 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash 846771407, now seen corresponding path program 382 times [2022-02-15 13:12:45,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:45,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616325151] [2022-02-15 13:12:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:45,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:45,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:45,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616325151] [2022-02-15 13:12:45,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616325151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:45,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524112504] [2022-02-15 13:12:45,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:12:45,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:45,622 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:45,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-02-15 13:12:45,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:12:45,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:45,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:45,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:45,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524112504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:45,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:45,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:12:45,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735541341] [2022-02-15 13:12:45,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:45,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:45,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:45,783 INFO L87 Difference]: Start difference. First operand 16020 states and 51041 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:46,318 INFO L93 Difference]: Finished difference Result 17722 states and 55602 transitions. [2022-02-15 13:12:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:12:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:46,356 INFO L225 Difference]: With dead ends: 17722 [2022-02-15 13:12:46,356 INFO L226 Difference]: Without dead ends: 17708 [2022-02-15 13:12:46,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:12:46,357 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:46,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 151 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17708 states. [2022-02-15 13:12:46,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17708 to 16053. [2022-02-15 13:12:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16053 states, 16052 states have (on average 3.185771243458759) internal successors, (51138), 16052 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 51138 transitions. [2022-02-15 13:12:46,722 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 51138 transitions. Word has length 24 [2022-02-15 13:12:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:46,722 INFO L470 AbstractCegarLoop]: Abstraction has 16053 states and 51138 transitions. [2022-02-15 13:12:46,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 51138 transitions. [2022-02-15 13:12:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:46,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:46,748 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:46,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:46,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:46,948 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash -909630513, now seen corresponding path program 383 times [2022-02-15 13:12:46,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:46,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440513345] [2022-02-15 13:12:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:46,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:47,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:47,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440513345] [2022-02-15 13:12:47,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440513345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:47,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812636980] [2022-02-15 13:12:47,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:12:47,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:47,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:47,010 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:47,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-02-15 13:12:47,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:12:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:47,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:47,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812636980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:47,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:47,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:12:47,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181274569] [2022-02-15 13:12:47,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:47,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:47,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:47,163 INFO L87 Difference]: Start difference. First operand 16053 states and 51138 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:47,655 INFO L93 Difference]: Finished difference Result 17524 states and 54984 transitions. [2022-02-15 13:12:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:12:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:47,693 INFO L225 Difference]: With dead ends: 17524 [2022-02-15 13:12:47,693 INFO L226 Difference]: Without dead ends: 17506 [2022-02-15 13:12:47,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=862, Invalid=1894, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:12:47,694 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:47,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 135 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2022-02-15 13:12:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 16094. [2022-02-15 13:12:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 3.1848008450879264) internal successors, (51253), 16093 states have internal predecessors, (51253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 51253 transitions. [2022-02-15 13:12:48,028 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 51253 transitions. Word has length 24 [2022-02-15 13:12:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:48,028 INFO L470 AbstractCegarLoop]: Abstraction has 16094 states and 51253 transitions. [2022-02-15 13:12:48,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 51253 transitions. [2022-02-15 13:12:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:48,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:48,053 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:48,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-02-15 13:12:48,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:48,254 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:48,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:48,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1666110671, now seen corresponding path program 384 times [2022-02-15 13:12:48,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:48,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032668801] [2022-02-15 13:12:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:48,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:48,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:48,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032668801] [2022-02-15 13:12:48,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032668801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:48,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437860938] [2022-02-15 13:12:48,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:12:48,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:48,311 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:48,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-02-15 13:12:48,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:12:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:48,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:48,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:48,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437860938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:48,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:48,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:12:48,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004479521] [2022-02-15 13:12:48,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:48,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:48,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:48,464 INFO L87 Difference]: Start difference. First operand 16094 states and 51253 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:49,188 INFO L93 Difference]: Finished difference Result 17741 states and 55478 transitions. [2022-02-15 13:12:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:12:49,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:49,226 INFO L225 Difference]: With dead ends: 17741 [2022-02-15 13:12:49,226 INFO L226 Difference]: Without dead ends: 17731 [2022-02-15 13:12:49,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:12:49,227 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:49,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 195 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2022-02-15 13:12:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 16203. [2022-02-15 13:12:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.1827552154055057) internal successors, (51567), 16202 states have internal predecessors, (51567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 51567 transitions. [2022-02-15 13:12:49,638 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 51567 transitions. Word has length 24 [2022-02-15 13:12:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:49,638 INFO L470 AbstractCegarLoop]: Abstraction has 16203 states and 51567 transitions. [2022-02-15 13:12:49,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 51567 transitions. [2022-02-15 13:12:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:49,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:49,666 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:49,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:49,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-02-15 13:12:49,867 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash 363725775, now seen corresponding path program 385 times [2022-02-15 13:12:49,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:49,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125109112] [2022-02-15 13:12:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:49,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:49,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:49,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125109112] [2022-02-15 13:12:49,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125109112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:49,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093520754] [2022-02-15 13:12:49,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:12:49,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:49,928 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:49,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-02-15 13:12:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:49,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:49,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:50,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:50,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093520754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:50,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:50,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:12:50,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315859714] [2022-02-15 13:12:50,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:50,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:50,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:50,092 INFO L87 Difference]: Start difference. First operand 16203 states and 51567 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:50,993 INFO L93 Difference]: Finished difference Result 18351 states and 57209 transitions. [2022-02-15 13:12:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:12:50,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:51,031 INFO L225 Difference]: With dead ends: 18351 [2022-02-15 13:12:51,032 INFO L226 Difference]: Without dead ends: 18347 [2022-02-15 13:12:51,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1920, Invalid=3780, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:12:51,032 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:51,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 210 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2022-02-15 13:12:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 16270. [2022-02-15 13:12:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16270 states, 16269 states have (on average 3.1803429835884196) internal successors, (51741), 16269 states have internal predecessors, (51741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16270 states to 16270 states and 51741 transitions. [2022-02-15 13:12:51,368 INFO L78 Accepts]: Start accepts. Automaton has 16270 states and 51741 transitions. Word has length 24 [2022-02-15 13:12:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:51,368 INFO L470 AbstractCegarLoop]: Abstraction has 16270 states and 51741 transitions. [2022-02-15 13:12:51,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 16270 states and 51741 transitions. [2022-02-15 13:12:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:51,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:51,394 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:51,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:51,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-02-15 13:12:51,594 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 321713359, now seen corresponding path program 386 times [2022-02-15 13:12:51,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:51,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934661348] [2022-02-15 13:12:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:51,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:51,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:51,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934661348] [2022-02-15 13:12:51,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934661348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:51,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140799732] [2022-02-15 13:12:51,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:12:51,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:51,653 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:51,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-02-15 13:12:51,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:12:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:51,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:51,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140799732] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:51,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:51,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:12:51,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060269708] [2022-02-15 13:12:51,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:51,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:51,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:51,808 INFO L87 Difference]: Start difference. First operand 16270 states and 51741 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:52,663 INFO L93 Difference]: Finished difference Result 18812 states and 58615 transitions. [2022-02-15 13:12:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:12:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:52,701 INFO L225 Difference]: With dead ends: 18812 [2022-02-15 13:12:52,701 INFO L226 Difference]: Without dead ends: 18812 [2022-02-15 13:12:52,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:12:52,702 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 261 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:52,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 256 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2022-02-15 13:12:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 16419. [2022-02-15 13:12:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16419 states, 16418 states have (on average 3.188451699354367) internal successors, (52348), 16418 states have internal predecessors, (52348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16419 states to 16419 states and 52348 transitions. [2022-02-15 13:12:53,091 INFO L78 Accepts]: Start accepts. Automaton has 16419 states and 52348 transitions. Word has length 24 [2022-02-15 13:12:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:53,091 INFO L470 AbstractCegarLoop]: Abstraction has 16419 states and 52348 transitions. [2022-02-15 13:12:53,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 16419 states and 52348 transitions. [2022-02-15 13:12:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:53,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:53,117 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:53,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Ended with exit code 0 [2022-02-15 13:12:53,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-02-15 13:12:53,317 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash 893168165, now seen corresponding path program 387 times [2022-02-15 13:12:53,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:53,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111826278] [2022-02-15 13:12:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:53,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:53,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:53,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111826278] [2022-02-15 13:12:53,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111826278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:53,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113924014] [2022-02-15 13:12:53,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:12:53,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:53,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:53,376 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:53,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-02-15 13:12:53,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:12:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:53,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:12:53,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113924014] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:53,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:53,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 22 [2022-02-15 13:12:53,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22703614] [2022-02-15 13:12:53,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:53,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:53,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:53,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:53,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:53,533 INFO L87 Difference]: Start difference. First operand 16419 states and 52348 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:54,484 INFO L93 Difference]: Finished difference Result 17894 states and 55882 transitions. [2022-02-15 13:12:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:12:54,484 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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 24 [2022-02-15 13:12:54,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:54,522 INFO L225 Difference]: With dead ends: 17894 [2022-02-15 13:12:54,522 INFO L226 Difference]: Without dead ends: 17879 [2022-02-15 13:12:54,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 13:12:54,524 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 220 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:54,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 259 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17879 states. [2022-02-15 13:12:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17879 to 15868. [2022-02-15 13:12:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15868 states, 15867 states have (on average 3.1803743618831537) internal successors, (50463), 15867 states have internal predecessors, (50463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 50463 transitions. [2022-02-15 13:12:54,857 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 50463 transitions. Word has length 24 [2022-02-15 13:12:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:54,857 INFO L470 AbstractCegarLoop]: Abstraction has 15868 states and 50463 transitions. [2022-02-15 13:12:54,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2022-02-15 13:12:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 50463 transitions. [2022-02-15 13:12:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:54,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:54,882 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:54,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-02-15 13:12:55,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-02-15 13:12:55,083 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1428397967, now seen corresponding path program 388 times [2022-02-15 13:12:55,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:55,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889275147] [2022-02-15 13:12:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:55,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:55,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:55,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889275147] [2022-02-15 13:12:55,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889275147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:55,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006193719] [2022-02-15 13:12:55,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:12:55,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:55,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:55,147 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:55,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-02-15 13:12:55,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:12:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:55,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:55,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:55,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006193719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:55,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:55,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-02-15 13:12:55,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499077057] [2022-02-15 13:12:55,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:55,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:12:55,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:12:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:12:55,306 INFO L87 Difference]: Start difference. First operand 15868 states and 50463 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:12:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:56,154 INFO L93 Difference]: Finished difference Result 17262 states and 53968 transitions. [2022-02-15 13:12:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 13:12:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 24 [2022-02-15 13:12:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:56,190 INFO L225 Difference]: With dead ends: 17262 [2022-02-15 13:12:56,190 INFO L226 Difference]: Without dead ends: 17250 [2022-02-15 13:12:56,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:12:56,191 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 179 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:56,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 209 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2022-02-15 13:12:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 15928. [2022-02-15 13:12:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.1800087901048535) internal successors, (50648), 15927 states have internal predecessors, (50648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50648 transitions. [2022-02-15 13:12:56,601 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50648 transitions. Word has length 24 [2022-02-15 13:12:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:56,602 INFO L470 AbstractCegarLoop]: Abstraction has 15928 states and 50648 transitions. [2022-02-15 13:12:56,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-02-15 13:12:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50648 transitions. [2022-02-15 13:12:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:56,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:56,625 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:56,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:56,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:56,826 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:56,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1162494723, now seen corresponding path program 389 times [2022-02-15 13:12:56,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:56,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958517952] [2022-02-15 13:12:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:56,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:56,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:56,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958517952] [2022-02-15 13:12:56,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958517952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:56,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175386145] [2022-02-15 13:12:56,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:12:56,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:56,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:56,890 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:56,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-02-15 13:12:56,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:12:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:57,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:57,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175386145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:57,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:57,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2022-02-15 13:12:57,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64293132] [2022-02-15 13:12:57,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:57,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:12:57,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:12:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:12:57,060 INFO L87 Difference]: Start difference. First operand 15928 states and 50648 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:57,680 INFO L93 Difference]: Finished difference Result 17178 states and 53993 transitions. [2022-02-15 13:12:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:12:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:57,718 INFO L225 Difference]: With dead ends: 17178 [2022-02-15 13:12:57,718 INFO L226 Difference]: Without dead ends: 17178 [2022-02-15 13:12:57,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1411, Invalid=3145, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:12:57,719 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:57,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 120 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2022-02-15 13:12:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 15887. [2022-02-15 13:12:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15887 states, 15886 states have (on average 3.1804733727810652) internal successors, (50525), 15886 states have internal predecessors, (50525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 50525 transitions. [2022-02-15 13:12:58,027 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 50525 transitions. Word has length 24 [2022-02-15 13:12:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:58,027 INFO L470 AbstractCegarLoop]: Abstraction has 15887 states and 50525 transitions. [2022-02-15 13:12:58,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 50525 transitions. [2022-02-15 13:12:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:58,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:58,052 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:58,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:58,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2022-02-15 13:12:58,252 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2031019403, now seen corresponding path program 390 times [2022-02-15 13:12:58,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:58,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862339122] [2022-02-15 13:12:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:58,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:58,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:58,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862339122] [2022-02-15 13:12:58,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862339122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:58,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396570611] [2022-02-15 13:12:58,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:12:58,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:58,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:58,311 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:58,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-02-15 13:12:58,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:12:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:12:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:58,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:58,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396570611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:58,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:58,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 23 [2022-02-15 13:12:58,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489596851] [2022-02-15 13:12:58,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:58,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:12:58,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:58,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:12:58,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:12:58,479 INFO L87 Difference]: Start difference. First operand 15887 states and 50525 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:59,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:12:59,062 INFO L93 Difference]: Finished difference Result 17298 states and 54207 transitions. [2022-02-15 13:12:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:12:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:12:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:12:59,099 INFO L225 Difference]: With dead ends: 17298 [2022-02-15 13:12:59,099 INFO L226 Difference]: Without dead ends: 17284 [2022-02-15 13:12:59,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1112, Invalid=2548, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:12:59,100 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 104 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:12:59,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 136 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:12:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17284 states. [2022-02-15 13:12:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17284 to 15888. [2022-02-15 13:12:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15887 states have (on average 3.180147290237301) internal successors, (50523), 15887 states have internal predecessors, (50523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 50523 transitions. [2022-02-15 13:12:59,422 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 50523 transitions. Word has length 24 [2022-02-15 13:12:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:12:59,422 INFO L470 AbstractCegarLoop]: Abstraction has 15888 states and 50523 transitions. [2022-02-15 13:12:59,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:12:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 50523 transitions. [2022-02-15 13:12:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:12:59,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:12:59,448 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:12:59,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-02-15 13:12:59,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2022-02-15 13:12:59,648 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:12:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:12:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash 812110339, now seen corresponding path program 391 times [2022-02-15 13:12:59,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:12:59,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158231441] [2022-02-15 13:12:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:12:59,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:12:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:59,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:12:59,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158231441] [2022-02-15 13:12:59,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158231441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:12:59,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923229609] [2022-02-15 13:12:59,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:12:59,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:12:59,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:12:59,702 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:12:59,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-02-15 13:12:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:12:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:12:59,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:12:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:59,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:12:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:12:59,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923229609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:12:59,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:12:59,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-02-15 13:12:59,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965704681] [2022-02-15 13:12:59,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:12:59,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:12:59,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:12:59,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:12:59,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:12:59,864 INFO L87 Difference]: Start difference. First operand 15888 states and 50523 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:00,500 INFO L93 Difference]: Finished difference Result 17783 states and 55482 transitions. [2022-02-15 13:13:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:13:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:00,536 INFO L225 Difference]: With dead ends: 17783 [2022-02-15 13:13:00,537 INFO L226 Difference]: Without dead ends: 17773 [2022-02-15 13:13:00,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1178, Invalid=2604, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:13:00,537 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 149 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:00,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 129 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17773 states. [2022-02-15 13:13:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17773 to 16003. [2022-02-15 13:13:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16003 states, 16002 states have (on average 3.1781652293463316) internal successors, (50857), 16002 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 50857 transitions. [2022-02-15 13:13:00,852 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 50857 transitions. Word has length 24 [2022-02-15 13:13:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:00,852 INFO L470 AbstractCegarLoop]: Abstraction has 16003 states and 50857 transitions. [2022-02-15 13:13:00,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 50857 transitions. [2022-02-15 13:13:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:00,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:00,878 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:00,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-02-15 13:13:01,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:01,078 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash -58493301, now seen corresponding path program 392 times [2022-02-15 13:13:01,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:01,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063494651] [2022-02-15 13:13:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:01,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:01,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:01,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063494651] [2022-02-15 13:13:01,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063494651] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:01,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251230236] [2022-02-15 13:13:01,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:13:01,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:01,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:01,131 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:01,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-02-15 13:13:01,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:13:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:01,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:01,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:01,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:01,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251230236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:01,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:01,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-02-15 13:13:01,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381374745] [2022-02-15 13:13:01,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:01,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:01,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:01,293 INFO L87 Difference]: Start difference. First operand 16003 states and 50857 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:01,971 INFO L93 Difference]: Finished difference Result 17914 states and 55910 transitions. [2022-02-15 13:13:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:13:01,971 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:02,024 INFO L225 Difference]: With dead ends: 17914 [2022-02-15 13:13:02,024 INFO L226 Difference]: Without dead ends: 17904 [2022-02-15 13:13:02,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:13:02,025 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 136 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:02,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 204 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2022-02-15 13:13:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 16144. [2022-02-15 13:13:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16144 states, 16143 states have (on average 3.1767329492659355) internal successors, (51282), 16143 states have internal predecessors, (51282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16144 states to 16144 states and 51282 transitions. [2022-02-15 13:13:02,404 INFO L78 Accepts]: Start accepts. Automaton has 16144 states and 51282 transitions. Word has length 24 [2022-02-15 13:13:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:02,404 INFO L470 AbstractCegarLoop]: Abstraction has 16144 states and 51282 transitions. [2022-02-15 13:13:02,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 16144 states and 51282 transitions. [2022-02-15 13:13:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:02,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:02,435 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:02,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2022-02-15 13:13:02,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:02,636 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash 329064707, now seen corresponding path program 393 times [2022-02-15 13:13:02,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:02,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118844628] [2022-02-15 13:13:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:02,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:02,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:02,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118844628] [2022-02-15 13:13:02,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118844628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:02,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140966430] [2022-02-15 13:13:02,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:13:02,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:02,692 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:02,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-02-15 13:13:02,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:13:02,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:02,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:02,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140966430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:02,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:02,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-02-15 13:13:02,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824066204] [2022-02-15 13:13:02,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:02,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:02,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:02,863 INFO L87 Difference]: Start difference. First operand 16144 states and 51282 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:03,746 INFO L93 Difference]: Finished difference Result 18800 states and 58404 transitions. [2022-02-15 13:13:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:13:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:03,801 INFO L225 Difference]: With dead ends: 18800 [2022-02-15 13:13:03,801 INFO L226 Difference]: Without dead ends: 18796 [2022-02-15 13:13:03,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1723, Invalid=3389, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:13:03,802 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:03,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 360 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:13:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2022-02-15 13:13:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 16306. [2022-02-15 13:13:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16306 states, 16305 states have (on average 3.176448942042318) internal successors, (51792), 16305 states have internal predecessors, (51792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 51792 transitions. [2022-02-15 13:13:04,250 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 51792 transitions. Word has length 24 [2022-02-15 13:13:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:04,250 INFO L470 AbstractCegarLoop]: Abstraction has 16306 states and 51792 transitions. [2022-02-15 13:13:04,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 51792 transitions. [2022-02-15 13:13:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:04,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:04,282 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:04,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-02-15 13:13:04,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2022-02-15 13:13:04,482 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:04,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1172850571, now seen corresponding path program 394 times [2022-02-15 13:13:04,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:04,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024695146] [2022-02-15 13:13:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:04,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:04,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:04,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024695146] [2022-02-15 13:13:04,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024695146] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:04,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419847431] [2022-02-15 13:13:04,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:13:04,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:04,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:04,536 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:04,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-02-15 13:13:04,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:13:04,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:04,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:04,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419847431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:04,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:04,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-02-15 13:13:04,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458584501] [2022-02-15 13:13:04,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:04,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:04,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:04,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:04,699 INFO L87 Difference]: Start difference. First operand 16306 states and 51792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:05,514 INFO L93 Difference]: Finished difference Result 19224 states and 59687 transitions. [2022-02-15 13:13:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:13:05,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:05,571 INFO L225 Difference]: With dead ends: 19224 [2022-02-15 13:13:05,571 INFO L226 Difference]: Without dead ends: 19224 [2022-02-15 13:13:05,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:13:05,572 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 260 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:05,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 202 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2022-02-15 13:13:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 16395. [2022-02-15 13:13:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16395 states, 16394 states have (on average 3.1835427595461754) internal successors, (52191), 16394 states have internal predecessors, (52191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16395 states to 16395 states and 52191 transitions. [2022-02-15 13:13:05,968 INFO L78 Accepts]: Start accepts. Automaton has 16395 states and 52191 transitions. Word has length 24 [2022-02-15 13:13:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:05,968 INFO L470 AbstractCegarLoop]: Abstraction has 16395 states and 52191 transitions. [2022-02-15 13:13:05,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 16395 states and 52191 transitions. [2022-02-15 13:13:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:06,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:06,000 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:06,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-02-15 13:13:06,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:06,201 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:06,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1744305377, now seen corresponding path program 395 times [2022-02-15 13:13:06,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:06,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068936400] [2022-02-15 13:13:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:06,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:06,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:06,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068936400] [2022-02-15 13:13:06,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068936400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:06,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410728466] [2022-02-15 13:13:06,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:13:06,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:06,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:06,257 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:06,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-02-15 13:13:06,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:13:06,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:06,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:06,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:06,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:06,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410728466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:06,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:06,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 22 [2022-02-15 13:13:06,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563240660] [2022-02-15 13:13:06,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:06,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:06,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:06,426 INFO L87 Difference]: Start difference. First operand 16395 states and 52191 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:07,446 INFO L93 Difference]: Finished difference Result 18347 states and 57068 transitions. [2022-02-15 13:13:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:13:07,446 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:07,500 INFO L225 Difference]: With dead ends: 18347 [2022-02-15 13:13:07,500 INFO L226 Difference]: Without dead ends: 18335 [2022-02-15 13:13:07,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:13:07,501 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 191 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:07,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 290 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:13:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2022-02-15 13:13:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 16091. [2022-02-15 13:13:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.1781852082038533) internal successors, (51137), 16090 states have internal predecessors, (51137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 51137 transitions. [2022-02-15 13:13:07,930 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 51137 transitions. Word has length 24 [2022-02-15 13:13:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:07,930 INFO L470 AbstractCegarLoop]: Abstraction has 16091 states and 51137 transitions. [2022-02-15 13:13:07,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 51137 transitions. [2022-02-15 13:13:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:07,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:07,960 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:07,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-02-15 13:13:08,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2022-02-15 13:13:08,160 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:08,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2015432117, now seen corresponding path program 396 times [2022-02-15 13:13:08,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:08,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678721744] [2022-02-15 13:13:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:08,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:08,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:08,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678721744] [2022-02-15 13:13:08,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678721744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:08,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229107450] [2022-02-15 13:13:08,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:13:08,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:08,221 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:08,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-02-15 13:13:08,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:13:08,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:08,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:08,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:08,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229107450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:08,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:08,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 23 [2022-02-15 13:13:08,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946062372] [2022-02-15 13:13:08,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:08,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:13:08,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:13:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:13:08,391 INFO L87 Difference]: Start difference. First operand 16091 states and 51137 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:09,347 INFO L93 Difference]: Finished difference Result 18125 states and 56330 transitions. [2022-02-15 13:13:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:13:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:09,400 INFO L225 Difference]: With dead ends: 18125 [2022-02-15 13:13:09,401 INFO L226 Difference]: Without dead ends: 18101 [2022-02-15 13:13:09,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:13:09,402 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 230 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:09,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 232 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2022-02-15 13:13:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 15884. [2022-02-15 13:13:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15884 states, 15883 states have (on average 3.1798148964301456) internal successors, (50505), 15883 states have internal predecessors, (50505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 50505 transitions. [2022-02-15 13:13:09,782 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 50505 transitions. Word has length 24 [2022-02-15 13:13:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:09,782 INFO L470 AbstractCegarLoop]: Abstraction has 15884 states and 50505 transitions. [2022-02-15 13:13:09,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 50505 transitions. [2022-02-15 13:13:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:09,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:09,813 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:09,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Forceful destruction successful, exit code 0 [2022-02-15 13:13:10,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:10,014 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:10,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1691789857, now seen corresponding path program 397 times [2022-02-15 13:13:10,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:10,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168468511] [2022-02-15 13:13:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:10,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:10,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:10,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168468511] [2022-02-15 13:13:10,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168468511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:10,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617713989] [2022-02-15 13:13:10,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:13:10,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:10,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:10,081 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:10,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-02-15 13:13:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:10,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:10,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:10,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617713989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:10,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:10,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2022-02-15 13:13:10,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140998736] [2022-02-15 13:13:10,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:10,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:13:10,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:13:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:13:10,255 INFO L87 Difference]: Start difference. First operand 15884 states and 50505 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:11,118 INFO L93 Difference]: Finished difference Result 17742 states and 55315 transitions. [2022-02-15 13:13:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:13:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:11,169 INFO L225 Difference]: With dead ends: 17742 [2022-02-15 13:13:11,169 INFO L226 Difference]: Without dead ends: 17724 [2022-02-15 13:13:11,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:13:11,170 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 189 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:11,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 187 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2022-02-15 13:13:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 15928. [2022-02-15 13:13:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.180322722421046) internal successors, (50653), 15927 states have internal predecessors, (50653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50653 transitions. [2022-02-15 13:13:11,594 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50653 transitions. Word has length 24 [2022-02-15 13:13:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:11,594 INFO L470 AbstractCegarLoop]: Abstraction has 15928 states and 50653 transitions. [2022-02-15 13:13:11,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50653 transitions. [2022-02-15 13:13:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:11,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:11,625 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:11,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-02-15 13:13:11,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-02-15 13:13:11,826 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1915082161, now seen corresponding path program 398 times [2022-02-15 13:13:11,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:11,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102667777] [2022-02-15 13:13:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:11,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:11,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:11,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102667777] [2022-02-15 13:13:11,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102667777] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:11,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001181980] [2022-02-15 13:13:11,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:13:11,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:11,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:11,893 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:11,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-02-15 13:13:11,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:13:11,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:11,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:11,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:12,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:12,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001181980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:12,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:12,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-02-15 13:13:12,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972226228] [2022-02-15 13:13:12,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:12,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:13:12,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:13:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:13:12,082 INFO L87 Difference]: Start difference. First operand 15928 states and 50653 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:12,810 INFO L93 Difference]: Finished difference Result 16795 states and 52835 transitions. [2022-02-15 13:13:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:13:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:12,859 INFO L225 Difference]: With dead ends: 16795 [2022-02-15 13:13:12,859 INFO L226 Difference]: Without dead ends: 16795 [2022-02-15 13:13:12,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:13:12,860 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:12,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 137 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2022-02-15 13:13:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 15853. [2022-02-15 13:13:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15853 states, 15852 states have (on average 3.181049709815796) internal successors, (50426), 15852 states have internal predecessors, (50426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15853 states to 15853 states and 50426 transitions. [2022-02-15 13:13:13,222 INFO L78 Accepts]: Start accepts. Automaton has 15853 states and 50426 transitions. Word has length 24 [2022-02-15 13:13:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:13,222 INFO L470 AbstractCegarLoop]: Abstraction has 15853 states and 50426 transitions. [2022-02-15 13:13:13,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 15853 states and 50426 transitions. [2022-02-15 13:13:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:13,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:13,253 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:13,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-02-15 13:13:13,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:13,453 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash 88001615, now seen corresponding path program 399 times [2022-02-15 13:13:13,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:13,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486425769] [2022-02-15 13:13:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:13,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:13,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:13,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486425769] [2022-02-15 13:13:13,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486425769] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:13,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265526179] [2022-02-15 13:13:13,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:13:13,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:13,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:13,514 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:13,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-02-15 13:13:13,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:13:13,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:13,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:13,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:13,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:13,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265526179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:13,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:13,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 24 [2022-02-15 13:13:13,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174691795] [2022-02-15 13:13:13,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:13,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:13:13,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:13:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:13:13,712 INFO L87 Difference]: Start difference. First operand 15853 states and 50426 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:14,385 INFO L93 Difference]: Finished difference Result 16783 states and 52633 transitions. [2022-02-15 13:13:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:13:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:14,433 INFO L225 Difference]: With dead ends: 16783 [2022-02-15 13:13:14,433 INFO L226 Difference]: Without dead ends: 16769 [2022-02-15 13:13:14,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1254, Invalid=3036, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:13:14,434 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:14,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 148 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16769 states. [2022-02-15 13:13:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16769 to 15761. [2022-02-15 13:13:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15761 states, 15760 states have (on average 3.1805837563451775) internal successors, (50126), 15760 states have internal predecessors, (50126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15761 states to 15761 states and 50126 transitions. [2022-02-15 13:13:14,729 INFO L78 Accepts]: Start accepts. Automaton has 15761 states and 50126 transitions. Word has length 24 [2022-02-15 13:13:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:14,729 INFO L470 AbstractCegarLoop]: Abstraction has 15761 states and 50126 transitions. [2022-02-15 13:13:14,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 15761 states and 50126 transitions. [2022-02-15 13:13:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:14,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:14,754 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:14,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-02-15 13:13:14,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2022-02-15 13:13:14,954 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1648498097, now seen corresponding path program 400 times [2022-02-15 13:13:14,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:14,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590535207] [2022-02-15 13:13:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:14,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:15,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:15,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590535207] [2022-02-15 13:13:15,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590535207] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:15,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544389405] [2022-02-15 13:13:15,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:13:15,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:15,008 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:15,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-02-15 13:13:15,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:13:15,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:15,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:15,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:15,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544389405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:15,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:15,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 23 [2022-02-15 13:13:15,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213107119] [2022-02-15 13:13:15,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:15,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:13:15,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:15,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:13:15,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:13:15,185 INFO L87 Difference]: Start difference. First operand 15761 states and 50126 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:15,906 INFO L93 Difference]: Finished difference Result 17488 states and 54534 transitions. [2022-02-15 13:13:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:13:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:15,953 INFO L225 Difference]: With dead ends: 17488 [2022-02-15 13:13:15,954 INFO L226 Difference]: Without dead ends: 17478 [2022-02-15 13:13:15,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1312, Invalid=2978, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:13:15,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 154 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:15,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 155 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2022-02-15 13:13:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 15724. [2022-02-15 13:13:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15724 states, 15723 states have (on average 3.179800292565032) internal successors, (49996), 15723 states have internal predecessors, (49996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15724 states to 15724 states and 49996 transitions. [2022-02-15 13:13:16,318 INFO L78 Accepts]: Start accepts. Automaton has 15724 states and 49996 transitions. Word has length 24 [2022-02-15 13:13:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:16,318 INFO L470 AbstractCegarLoop]: Abstraction has 15724 states and 49996 transitions. [2022-02-15 13:13:16,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 15724 states and 49996 transitions. [2022-02-15 13:13:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:16,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:16,350 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:16,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-02-15 13:13:16,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-02-15 13:13:16,550 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1981608881, now seen corresponding path program 401 times [2022-02-15 13:13:16,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:16,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019099550] [2022-02-15 13:13:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:16,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:16,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:16,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019099550] [2022-02-15 13:13:16,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019099550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:16,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908693382] [2022-02-15 13:13:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:13:16,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:16,601 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:16,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-02-15 13:13:16,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:13:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:16,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:16,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:16,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908693382] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:16,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:16,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-02-15 13:13:16,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080766360] [2022-02-15 13:13:16,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:16,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:16,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:16,776 INFO L87 Difference]: Start difference. First operand 15724 states and 49996 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:17,503 INFO L93 Difference]: Finished difference Result 19027 states and 59058 transitions. [2022-02-15 13:13:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:13:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:17,554 INFO L225 Difference]: With dead ends: 19027 [2022-02-15 13:13:17,554 INFO L226 Difference]: Without dead ends: 19021 [2022-02-15 13:13:17,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1353, Invalid=2807, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:13:17,555 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 193 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:17,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 270 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2022-02-15 13:13:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 16139. [2022-02-15 13:13:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.178584706902962) internal successors, (51296), 16138 states have internal predecessors, (51296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 51296 transitions. [2022-02-15 13:13:17,945 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 51296 transitions. Word has length 24 [2022-02-15 13:13:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:17,945 INFO L470 AbstractCegarLoop]: Abstraction has 16139 states and 51296 transitions. [2022-02-15 13:13:17,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 51296 transitions. [2022-02-15 13:13:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:17,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:17,976 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:17,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-02-15 13:13:18,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:18,177 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash -745428401, now seen corresponding path program 402 times [2022-02-15 13:13:18,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:18,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596278276] [2022-02-15 13:13:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:18,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:18,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:18,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596278276] [2022-02-15 13:13:18,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596278276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:18,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281082883] [2022-02-15 13:13:18,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:13:18,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:18,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:18,239 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:18,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-02-15 13:13:18,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:13:18,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:18,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:18,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281082883] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:18,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:18,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-02-15 13:13:18,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752551943] [2022-02-15 13:13:18,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:18,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:18,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:18,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:18,418 INFO L87 Difference]: Start difference. First operand 16139 states and 51296 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:19,186 INFO L93 Difference]: Finished difference Result 18678 states and 58104 transitions. [2022-02-15 13:13:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:13:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:19,253 INFO L225 Difference]: With dead ends: 18678 [2022-02-15 13:13:19,253 INFO L226 Difference]: Without dead ends: 18674 [2022-02-15 13:13:19,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1546, Invalid=3010, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:13:19,254 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 172 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:19,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 243 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18674 states. [2022-02-15 13:13:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18674 to 16227. [2022-02-15 13:13:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16227 states, 16226 states have (on average 3.1787255022802907) internal successors, (51578), 16226 states have internal predecessors, (51578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16227 states to 16227 states and 51578 transitions. [2022-02-15 13:13:19,664 INFO L78 Accepts]: Start accepts. Automaton has 16227 states and 51578 transitions. Word has length 24 [2022-02-15 13:13:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:19,665 INFO L470 AbstractCegarLoop]: Abstraction has 16227 states and 51578 transitions. [2022-02-15 13:13:19,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 16227 states and 51578 transitions. [2022-02-15 13:13:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:19,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:19,696 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:19,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-02-15 13:13:19,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2022-02-15 13:13:19,897 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1788300367, now seen corresponding path program 403 times [2022-02-15 13:13:19,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:19,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473262245] [2022-02-15 13:13:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:19,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:19,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:19,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473262245] [2022-02-15 13:13:19,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473262245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:19,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421243226] [2022-02-15 13:13:19,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:13:19,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:19,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:19,948 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:19,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-02-15 13:13:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:19,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:20,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:20,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421243226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:20,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:20,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-02-15 13:13:20,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965803494] [2022-02-15 13:13:20,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:20,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:20,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:20,120 INFO L87 Difference]: Start difference. First operand 16227 states and 51578 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:20,906 INFO L93 Difference]: Finished difference Result 19416 states and 60144 transitions. [2022-02-15 13:13:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:13:20,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:20,964 INFO L225 Difference]: With dead ends: 19416 [2022-02-15 13:13:20,964 INFO L226 Difference]: Without dead ends: 19416 [2022-02-15 13:13:20,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:13:20,965 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:20,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 200 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19416 states. [2022-02-15 13:13:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19416 to 16138. [2022-02-15 13:13:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16138 states, 16137 states have (on average 3.1851645287228108) internal successors, (51399), 16137 states have internal predecessors, (51399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 51399 transitions. [2022-02-15 13:13:21,340 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 51399 transitions. Word has length 24 [2022-02-15 13:13:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:21,340 INFO L470 AbstractCegarLoop]: Abstraction has 16138 states and 51399 transitions. [2022-02-15 13:13:21,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 51399 transitions. [2022-02-15 13:13:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:21,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:21,364 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:21,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-02-15 13:13:21,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:21,565 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1935212123, now seen corresponding path program 404 times [2022-02-15 13:13:21,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:21,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726044298] [2022-02-15 13:13:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:21,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:21,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726044298] [2022-02-15 13:13:21,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726044298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86673914] [2022-02-15 13:13:21,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:13:21,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:21,617 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:21,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-02-15 13:13:21,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:13:21,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:21,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:21,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:21,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86673914] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:21,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:21,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2022-02-15 13:13:21,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006946598] [2022-02-15 13:13:21,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:21,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:21,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:21,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:21,793 INFO L87 Difference]: Start difference. First operand 16138 states and 51399 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:22,836 INFO L93 Difference]: Finished difference Result 18584 states and 57665 transitions. [2022-02-15 13:13:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:13:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:22,889 INFO L225 Difference]: With dead ends: 18584 [2022-02-15 13:13:22,890 INFO L226 Difference]: Without dead ends: 18575 [2022-02-15 13:13:22,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 13:13:22,891 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 225 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:22,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 224 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2022-02-15 13:13:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 16009. [2022-02-15 13:13:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 3.182408795602199) internal successors, (50944), 16008 states have internal predecessors, (50944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 50944 transitions. [2022-02-15 13:13:23,325 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 50944 transitions. Word has length 24 [2022-02-15 13:13:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:23,325 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 50944 transitions. [2022-02-15 13:13:23,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 50944 transitions. [2022-02-15 13:13:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:23,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:23,356 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:23,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-02-15 13:13:23,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:23,556 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1399982321, now seen corresponding path program 405 times [2022-02-15 13:13:23,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:23,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516947415] [2022-02-15 13:13:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:23,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:23,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:23,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516947415] [2022-02-15 13:13:23,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516947415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:23,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368950036] [2022-02-15 13:13:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:13:23,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:23,612 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:23,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-02-15 13:13:23,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:13:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:23,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:23,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:23,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:23,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368950036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:23,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:23,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 23 [2022-02-15 13:13:23,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249668427] [2022-02-15 13:13:23,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:23,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:13:23,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:23,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:13:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:13:23,789 INFO L87 Difference]: Start difference. First operand 16009 states and 50944 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:24,741 INFO L93 Difference]: Finished difference Result 18529 states and 57461 transitions. [2022-02-15 13:13:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:13:24,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:24,789 INFO L225 Difference]: With dead ends: 18529 [2022-02-15 13:13:24,789 INFO L226 Difference]: Without dead ends: 18514 [2022-02-15 13:13:24,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:13:24,791 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 245 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:24,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 182 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2022-02-15 13:13:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 15897. [2022-02-15 13:13:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 3.1817438349270257) internal successors, (50577), 15896 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 50577 transitions. [2022-02-15 13:13:25,105 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 50577 transitions. Word has length 24 [2022-02-15 13:13:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:25,105 INFO L470 AbstractCegarLoop]: Abstraction has 15897 states and 50577 transitions. [2022-02-15 13:13:25,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 50577 transitions. [2022-02-15 13:13:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:25,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:25,130 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:25,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Forceful destruction successful, exit code 0 [2022-02-15 13:13:25,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-02-15 13:13:25,330 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:25,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:25,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1987727643, now seen corresponding path program 406 times [2022-02-15 13:13:25,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:25,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417656637] [2022-02-15 13:13:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:25,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:25,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:25,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417656637] [2022-02-15 13:13:25,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417656637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:25,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130091025] [2022-02-15 13:13:25,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:13:25,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:25,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:25,389 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:25,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-02-15 13:13:25,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:13:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:25,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:25,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:25,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130091025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:25,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:25,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 24 [2022-02-15 13:13:25,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565252655] [2022-02-15 13:13:25,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:25,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:13:25,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:25,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:13:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:13:25,565 INFO L87 Difference]: Start difference. First operand 15897 states and 50577 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:26,478 INFO L93 Difference]: Finished difference Result 18517 states and 57409 transitions. [2022-02-15 13:13:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 13:13:26,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:26,520 INFO L225 Difference]: With dead ends: 18517 [2022-02-15 13:13:26,520 INFO L226 Difference]: Without dead ends: 18490 [2022-02-15 13:13:26,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:13:26,522 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 264 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:26,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 194 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2022-02-15 13:13:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 15779. [2022-02-15 13:13:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15779 states, 15778 states have (on average 3.1827227785524146) internal successors, (50217), 15778 states have internal predecessors, (50217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:26,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 50217 transitions. [2022-02-15 13:13:26,894 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 50217 transitions. Word has length 24 [2022-02-15 13:13:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:26,894 INFO L470 AbstractCegarLoop]: Abstraction has 15779 states and 50217 transitions. [2022-02-15 13:13:26,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 50217 transitions. [2022-02-15 13:13:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:26,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:26,920 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:26,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-02-15 13:13:27,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-02-15 13:13:27,120 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1267003855, now seen corresponding path program 407 times [2022-02-15 13:13:27,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:27,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451780115] [2022-02-15 13:13:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:27,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:27,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:27,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451780115] [2022-02-15 13:13:27,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451780115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:27,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222708233] [2022-02-15 13:13:27,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:13:27,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:27,186 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:27,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-02-15 13:13:27,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:13:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:27,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:27,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222708233] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:27,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:27,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-02-15 13:13:27,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594289514] [2022-02-15 13:13:27,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:27,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:13:27,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:13:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:13:27,365 INFO L87 Difference]: Start difference. First operand 15779 states and 50217 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:28,158 INFO L93 Difference]: Finished difference Result 18160 states and 56473 transitions. [2022-02-15 13:13:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:13:28,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:13:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:28,194 INFO L225 Difference]: With dead ends: 18160 [2022-02-15 13:13:28,194 INFO L226 Difference]: Without dead ends: 18136 [2022-02-15 13:13:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:13:28,196 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 181 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:28,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 174 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18136 states. [2022-02-15 13:13:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18136 to 15810. [2022-02-15 13:13:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15810 states, 15809 states have (on average 3.183123537225631) internal successors, (50322), 15809 states have internal predecessors, (50322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 50322 transitions. [2022-02-15 13:13:28,500 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 50322 transitions. Word has length 24 [2022-02-15 13:13:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:28,501 INFO L470 AbstractCegarLoop]: Abstraction has 15810 states and 50322 transitions. [2022-02-15 13:13:28,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 50322 transitions. [2022-02-15 13:13:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:28,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:28,525 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:28,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-02-15 13:13:28,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-02-15 13:13:28,726 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1464282243, now seen corresponding path program 408 times [2022-02-15 13:13:28,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:28,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680278726] [2022-02-15 13:13:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:28,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:28,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:28,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680278726] [2022-02-15 13:13:28,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680278726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:28,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859621940] [2022-02-15 13:13:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:13:28,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:28,793 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:28,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-02-15 13:13:28,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:13:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:28,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:28,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:28,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:28,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859621940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:28,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:28,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-02-15 13:13:28,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348527206] [2022-02-15 13:13:28,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:28,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:13:28,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:13:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:13:28,987 INFO L87 Difference]: Start difference. First operand 15810 states and 50322 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-15 13:13:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:29,761 INFO L93 Difference]: Finished difference Result 16413 states and 51718 transitions. [2022-02-15 13:13:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:13:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 24 [2022-02-15 13:13:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:29,796 INFO L225 Difference]: With dead ends: 16413 [2022-02-15 13:13:29,796 INFO L226 Difference]: Without dead ends: 16413 [2022-02-15 13:13:29,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1699, Invalid=4153, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:13:29,797 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 99 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:29,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 199 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2022-02-15 13:13:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 15703. [2022-02-15 13:13:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15703 states, 15702 states have (on average 3.1823971468602728) internal successors, (49970), 15702 states have internal predecessors, (49970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15703 states to 15703 states and 49970 transitions. [2022-02-15 13:13:30,189 INFO L78 Accepts]: Start accepts. Automaton has 15703 states and 49970 transitions. Word has length 24 [2022-02-15 13:13:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:30,189 INFO L470 AbstractCegarLoop]: Abstraction has 15703 states and 49970 transitions. [2022-02-15 13:13:30,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-15 13:13:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 15703 states and 49970 transitions. [2022-02-15 13:13:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:30,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:30,213 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:30,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Ended with exit code 0 [2022-02-15 13:13:30,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-02-15 13:13:30,414 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:30,414 INFO L85 PathProgramCache]: Analyzing trace with hash -16007669, now seen corresponding path program 409 times [2022-02-15 13:13:30,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:30,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730461416] [2022-02-15 13:13:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:30,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:30,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:30,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730461416] [2022-02-15 13:13:30,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730461416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:30,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389373979] [2022-02-15 13:13:30,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:13:30,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:30,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:30,473 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:30,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-02-15 13:13:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:30,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:30,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389373979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:30,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:30,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-02-15 13:13:30,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816824837] [2022-02-15 13:13:30,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:30,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:13:30,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:13:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:13:30,664 INFO L87 Difference]: Start difference. First operand 15703 states and 49970 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:13:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:31,353 INFO L93 Difference]: Finished difference Result 16653 states and 52172 transitions. [2022-02-15 13:13:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:13:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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 24 [2022-02-15 13:13:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:31,389 INFO L225 Difference]: With dead ends: 16653 [2022-02-15 13:13:31,389 INFO L226 Difference]: Without dead ends: 16639 [2022-02-15 13:13:31,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=3459, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:13:31,390 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:31,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 165 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16639 states. [2022-02-15 13:13:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16639 to 15440. [2022-02-15 13:13:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15440 states, 15439 states have (on average 3.1834315694021633) internal successors, (49149), 15439 states have internal predecessors, (49149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15440 states to 15440 states and 49149 transitions. [2022-02-15 13:13:31,692 INFO L78 Accepts]: Start accepts. Automaton has 15440 states and 49149 transitions. Word has length 24 [2022-02-15 13:13:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:31,693 INFO L470 AbstractCegarLoop]: Abstraction has 15440 states and 49149 transitions. [2022-02-15 13:13:31,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:13:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 15440 states and 49149 transitions. [2022-02-15 13:13:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:31,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:31,717 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:31,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-02-15 13:13:31,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-02-15 13:13:31,918 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash -617948285, now seen corresponding path program 410 times [2022-02-15 13:13:31,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:31,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495707335] [2022-02-15 13:13:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:31,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:31,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:31,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495707335] [2022-02-15 13:13:31,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495707335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:31,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191934391] [2022-02-15 13:13:31,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:13:31,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:31,973 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-02-15 13:13:31,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:13:31,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:32,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:32,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191934391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:32,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:32,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 24 [2022-02-15 13:13:32,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114629321] [2022-02-15 13:13:32,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:32,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:13:32,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:32,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:13:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:13:32,167 INFO L87 Difference]: Start difference. First operand 15440 states and 49149 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-02-15 13:13:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:32,894 INFO L93 Difference]: Finished difference Result 17145 states and 53340 transitions. [2022-02-15 13:13:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:13:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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 24 [2022-02-15 13:13:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:32,930 INFO L225 Difference]: With dead ends: 17145 [2022-02-15 13:13:32,930 INFO L226 Difference]: Without dead ends: 17135 [2022-02-15 13:13:32,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1349, Invalid=3207, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:13:32,931 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 191 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:32,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 284 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2022-02-15 13:13:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 15065. [2022-02-15 13:13:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15065 states, 15064 states have (on average 3.1838157195963888) internal successors, (47961), 15064 states have internal predecessors, (47961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 47961 transitions. [2022-02-15 13:13:33,239 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 47961 transitions. Word has length 24 [2022-02-15 13:13:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:33,239 INFO L470 AbstractCegarLoop]: Abstraction has 15065 states and 47961 transitions. [2022-02-15 13:13:33,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-02-15 13:13:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 47961 transitions. [2022-02-15 13:13:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:33,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:33,263 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:33,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-02-15 13:13:33,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-02-15 13:13:33,464 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1468649717, now seen corresponding path program 411 times [2022-02-15 13:13:33,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:33,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104774444] [2022-02-15 13:13:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:33,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:33,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:33,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104774444] [2022-02-15 13:13:33,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104774444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:33,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221600235] [2022-02-15 13:13:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:13:33,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:33,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:33,512 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:33,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-02-15 13:13:33,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:13:33,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:33,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:33,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221600235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:33,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:33,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 23 [2022-02-15 13:13:33,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870722992] [2022-02-15 13:13:33,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:33,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:13:33,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:13:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:13:33,691 INFO L87 Difference]: Start difference. First operand 15065 states and 47961 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-15 13:13:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:34,467 INFO L93 Difference]: Finished difference Result 18361 states and 56965 transitions. [2022-02-15 13:13:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:13:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 24 [2022-02-15 13:13:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:34,520 INFO L225 Difference]: With dead ends: 18361 [2022-02-15 13:13:34,520 INFO L226 Difference]: Without dead ends: 18355 [2022-02-15 13:13:34,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1388, Invalid=3034, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:13:34,521 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 198 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:34,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 276 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18355 states. [2022-02-15 13:13:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18355 to 15150. [2022-02-15 13:13:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15150 states, 15149 states have (on average 3.1832464189055383) internal successors, (48223), 15149 states have internal predecessors, (48223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15150 states to 15150 states and 48223 transitions. [2022-02-15 13:13:34,892 INFO L78 Accepts]: Start accepts. Automaton has 15150 states and 48223 transitions. Word has length 24 [2022-02-15 13:13:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:34,892 INFO L470 AbstractCegarLoop]: Abstraction has 15150 states and 48223 transitions. [2022-02-15 13:13:34,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-15 13:13:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 15150 states and 48223 transitions. [2022-02-15 13:13:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:34,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:34,921 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:34,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Forceful destruction successful, exit code 0 [2022-02-15 13:13:35,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:35,122 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash 305023619, now seen corresponding path program 412 times [2022-02-15 13:13:35,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:35,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104677628] [2022-02-15 13:13:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:35,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:35,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:35,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104677628] [2022-02-15 13:13:35,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104677628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:35,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336884331] [2022-02-15 13:13:35,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:13:35,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:35,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:35,168 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:35,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-02-15 13:13:35,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:13:35,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:35,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:35,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:35,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336884331] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:35,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:35,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-02-15 13:13:35,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778678138] [2022-02-15 13:13:35,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:35,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:35,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:35,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:35,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:35,345 INFO L87 Difference]: Start difference. First operand 15150 states and 48223 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:13:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:36,136 INFO L93 Difference]: Finished difference Result 20262 states and 62769 transitions. [2022-02-15 13:13:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:13:36,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 24 [2022-02-15 13:13:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:36,193 INFO L225 Difference]: With dead ends: 20262 [2022-02-15 13:13:36,193 INFO L226 Difference]: Without dead ends: 20260 [2022-02-15 13:13:36,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1573, Invalid=3119, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:13:36,194 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 163 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:36,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 292 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20260 states. [2022-02-15 13:13:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20260 to 16488. [2022-02-15 13:13:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16488 states, 16487 states have (on average 3.178746891490265) internal successors, (52408), 16487 states have internal predecessors, (52408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16488 states to 16488 states and 52408 transitions. [2022-02-15 13:13:36,551 INFO L78 Accepts]: Start accepts. Automaton has 16488 states and 52408 transitions. Word has length 24 [2022-02-15 13:13:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:36,551 INFO L470 AbstractCegarLoop]: Abstraction has 16488 states and 52408 transitions. [2022-02-15 13:13:36,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:13:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 16488 states and 52408 transitions. [2022-02-15 13:13:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:36,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:36,578 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:36,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-02-15 13:13:36,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2022-02-15 13:13:36,779 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -607592437, now seen corresponding path program 413 times [2022-02-15 13:13:36,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:36,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653671476] [2022-02-15 13:13:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:36,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:36,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:36,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653671476] [2022-02-15 13:13:36,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653671476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:36,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972512153] [2022-02-15 13:13:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:13:36,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:36,829 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:36,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-02-15 13:13:36,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:13:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:36,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:37,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972512153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:37,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:37,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-02-15 13:13:37,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016457485] [2022-02-15 13:13:37,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:37,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:37,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:37,004 INFO L87 Difference]: Start difference. First operand 16488 states and 52408 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:13:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:37,737 INFO L93 Difference]: Finished difference Result 19932 states and 61591 transitions. [2022-02-15 13:13:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:13:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 24 [2022-02-15 13:13:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:37,782 INFO L225 Difference]: With dead ends: 19932 [2022-02-15 13:13:37,782 INFO L226 Difference]: Without dead ends: 19932 [2022-02-15 13:13:37,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:13:37,783 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 281 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:37,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 191 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2022-02-15 13:13:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 16990. [2022-02-15 13:13:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16989 states have (on average 3.183648242980752) internal successors, (54087), 16989 states have internal predecessors, (54087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 54087 transitions. [2022-02-15 13:13:38,181 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 54087 transitions. Word has length 24 [2022-02-15 13:13:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:38,182 INFO L470 AbstractCegarLoop]: Abstraction has 16990 states and 54087 transitions. [2022-02-15 13:13:38,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:13:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 54087 transitions. [2022-02-15 13:13:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:38,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:38,208 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:38,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Ended with exit code 0 [2022-02-15 13:13:38,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-02-15 13:13:38,409 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -36137631, now seen corresponding path program 414 times [2022-02-15 13:13:38,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:38,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954030678] [2022-02-15 13:13:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:38,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:38,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:38,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954030678] [2022-02-15 13:13:38,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954030678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:38,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290220068] [2022-02-15 13:13:38,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:13:38,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:38,454 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:38,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-02-15 13:13:38,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:13:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:38,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:38,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:38,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290220068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:38,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:38,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 22 [2022-02-15 13:13:38,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380563597] [2022-02-15 13:13:38,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:38,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:38,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:38,628 INFO L87 Difference]: Start difference. First operand 16990 states and 54087 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:13:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:39,737 INFO L93 Difference]: Finished difference Result 19753 states and 61171 transitions. [2022-02-15 13:13:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 13:13:39,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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 24 [2022-02-15 13:13:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:39,781 INFO L225 Difference]: With dead ends: 19753 [2022-02-15 13:13:39,781 INFO L226 Difference]: Without dead ends: 19744 [2022-02-15 13:13:39,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 13:13:39,783 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 241 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:39,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 239 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2022-02-15 13:13:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 16867. [2022-02-15 13:13:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16867 states, 16866 states have (on average 3.1820230048618523) internal successors, (53668), 16866 states have internal predecessors, (53668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 53668 transitions. [2022-02-15 13:13:40,111 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 53668 transitions. Word has length 24 [2022-02-15 13:13:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:40,111 INFO L470 AbstractCegarLoop]: Abstraction has 16867 states and 53668 transitions. [2022-02-15 13:13:40,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 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) [2022-02-15 13:13:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 53668 transitions. [2022-02-15 13:13:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:40,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:40,137 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:40,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-02-15 13:13:40,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:40,338 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash 499092171, now seen corresponding path program 415 times [2022-02-15 13:13:40,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:40,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510037094] [2022-02-15 13:13:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:40,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:40,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:40,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510037094] [2022-02-15 13:13:40,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510037094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:40,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992184140] [2022-02-15 13:13:40,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:13:40,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:40,388 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:40,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-02-15 13:13:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:40,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:40,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992184140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:40,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:40,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 23 [2022-02-15 13:13:40,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186986308] [2022-02-15 13:13:40,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:40,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:13:40,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:40,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:13:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:13:40,561 INFO L87 Difference]: Start difference. First operand 16867 states and 53668 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-15 13:13:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:41,589 INFO L93 Difference]: Finished difference Result 19710 states and 61049 transitions. [2022-02-15 13:13:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:13:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 24 [2022-02-15 13:13:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:41,633 INFO L225 Difference]: With dead ends: 19710 [2022-02-15 13:13:41,633 INFO L226 Difference]: Without dead ends: 19698 [2022-02-15 13:13:41,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 13:13:41,635 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 215 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:41,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 244 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2022-02-15 13:13:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 16758. [2022-02-15 13:13:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16757 states have (on average 3.181476397923256) internal successors, (53312), 16757 states have internal predecessors, (53312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 53312 transitions. [2022-02-15 13:13:42,032 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 53312 transitions. Word has length 24 [2022-02-15 13:13:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:42,032 INFO L470 AbstractCegarLoop]: Abstraction has 16758 states and 53312 transitions. [2022-02-15 13:13:42,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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) [2022-02-15 13:13:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 53312 transitions. [2022-02-15 13:13:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:42,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:42,058 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:42,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-02-15 13:13:42,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-02-15 13:13:42,259 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash -88653151, now seen corresponding path program 416 times [2022-02-15 13:13:42,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:42,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481909280] [2022-02-15 13:13:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:42,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:42,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:42,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481909280] [2022-02-15 13:13:42,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481909280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:42,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982319649] [2022-02-15 13:13:42,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:13:42,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:42,314 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:42,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-02-15 13:13:42,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:13:42,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:42,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:42,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982319649] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:42,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:42,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 24 [2022-02-15 13:13:42,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493734479] [2022-02-15 13:13:42,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:42,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:13:42,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:13:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:13:42,492 INFO L87 Difference]: Start difference. First operand 16758 states and 53312 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-02-15 13:13:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:43,412 INFO L93 Difference]: Finished difference Result 19755 states and 61167 transitions. [2022-02-15 13:13:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 13:13:43,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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 24 [2022-02-15 13:13:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:43,454 INFO L225 Difference]: With dead ends: 19755 [2022-02-15 13:13:43,454 INFO L226 Difference]: Without dead ends: 19737 [2022-02-15 13:13:43,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 13:13:43,456 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 257 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:43,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 206 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2022-02-15 13:13:43,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 16856. [2022-02-15 13:13:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16856 states, 16855 states have (on average 3.18119252447345) internal successors, (53619), 16855 states have internal predecessors, (53619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 53619 transitions. [2022-02-15 13:13:43,795 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 53619 transitions. Word has length 24 [2022-02-15 13:13:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:43,795 INFO L470 AbstractCegarLoop]: Abstraction has 16856 states and 53619 transitions. [2022-02-15 13:13:43,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 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) [2022-02-15 13:13:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 53619 transitions. [2022-02-15 13:13:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:43,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:43,822 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:43,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-02-15 13:13:44,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2022-02-15 13:13:44,022 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1128888949, now seen corresponding path program 417 times [2022-02-15 13:13:44,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:44,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971850708] [2022-02-15 13:13:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:44,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:44,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:44,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971850708] [2022-02-15 13:13:44,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971850708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:44,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832773213] [2022-02-15 13:13:44,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:13:44,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:44,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:44,083 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:44,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-02-15 13:13:44,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:13:44,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:44,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:44,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:44,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832773213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:44,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:44,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 25 [2022-02-15 13:13:44,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573682103] [2022-02-15 13:13:44,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:44,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:13:44,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:13:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:13:44,267 INFO L87 Difference]: Start difference. First operand 16856 states and 53619 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:13:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:45,137 INFO L93 Difference]: Finished difference Result 20000 states and 61915 transitions. [2022-02-15 13:13:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 13:13:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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 24 [2022-02-15 13:13:45,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:45,178 INFO L225 Difference]: With dead ends: 20000 [2022-02-15 13:13:45,178 INFO L226 Difference]: Without dead ends: 19976 [2022-02-15 13:13:45,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:13:45,180 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 259 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:45,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 185 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2022-02-15 13:13:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 17037. [2022-02-15 13:13:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17037 states, 17036 states have (on average 3.181908898802536) internal successors, (54207), 17036 states have internal predecessors, (54207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 54207 transitions. [2022-02-15 13:13:45,571 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 54207 transitions. Word has length 24 [2022-02-15 13:13:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:45,571 INFO L470 AbstractCegarLoop]: Abstraction has 17037 states and 54207 transitions. [2022-02-15 13:13:45,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:13:45,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 54207 transitions. [2022-02-15 13:13:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:45,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:45,599 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:45,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-02-15 13:13:45,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:45,799 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash 983539681, now seen corresponding path program 418 times [2022-02-15 13:13:45,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:45,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438300165] [2022-02-15 13:13:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:45,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:45,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:45,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438300165] [2022-02-15 13:13:45,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438300165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:45,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574053835] [2022-02-15 13:13:45,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:13:45,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:45,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:45,867 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:45,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-02-15 13:13:45,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:13:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:45,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:45,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:46,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:46,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574053835] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:46,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:46,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-02-15 13:13:46,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529801614] [2022-02-15 13:13:46,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:46,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:13:46,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:13:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:13:46,059 INFO L87 Difference]: Start difference. First operand 17037 states and 54207 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-15 13:13:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:46,837 INFO L93 Difference]: Finished difference Result 19762 states and 61367 transitions. [2022-02-15 13:13:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:13:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 24 [2022-02-15 13:13:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:46,880 INFO L225 Difference]: With dead ends: 19762 [2022-02-15 13:13:46,880 INFO L226 Difference]: Without dead ends: 19732 [2022-02-15 13:13:46,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 13:13:46,881 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 155 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:46,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 185 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19732 states. [2022-02-15 13:13:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19732 to 17071. [2022-02-15 13:13:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 17070 states have (on average 3.1825424721734037) internal successors, (54326), 17070 states have internal predecessors, (54326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 54326 transitions. [2022-02-15 13:13:47,238 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 54326 transitions. Word has length 24 [2022-02-15 13:13:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:47,238 INFO L470 AbstractCegarLoop]: Abstraction has 17071 states and 54326 transitions. [2022-02-15 13:13:47,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2022-02-15 13:13:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 54326 transitions. [2022-02-15 13:13:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:47,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:47,264 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:47,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Ended with exit code 0 [2022-02-15 13:13:47,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-02-15 13:13:47,464 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1149603633, now seen corresponding path program 419 times [2022-02-15 13:13:47,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:47,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263111001] [2022-02-15 13:13:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:47,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:47,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:47,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263111001] [2022-02-15 13:13:47,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263111001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:47,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160325487] [2022-02-15 13:13:47,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:13:47,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:47,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:47,533 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:47,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-02-15 13:13:47,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:13:47,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:47,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:47,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160325487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:47,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:47,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-02-15 13:13:47,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845335030] [2022-02-15 13:13:47,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:47,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:13:47,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:47,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:13:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:13:47,742 INFO L87 Difference]: Start difference. First operand 17071 states and 54326 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-15 13:13:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:48,555 INFO L93 Difference]: Finished difference Result 18326 states and 57555 transitions. [2022-02-15 13:13:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:13:48,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 24 [2022-02-15 13:13:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:48,594 INFO L225 Difference]: With dead ends: 18326 [2022-02-15 13:13:48,594 INFO L226 Difference]: Without dead ends: 18326 [2022-02-15 13:13:48,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1794, Invalid=4526, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:13:48,595 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:48,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 221 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2022-02-15 13:13:48,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17148. [2022-02-15 13:13:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 17147 states have (on average 3.1787484691199626) internal successors, (54506), 17147 states have internal predecessors, (54506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 54506 transitions. [2022-02-15 13:13:48,962 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 54506 transitions. Word has length 24 [2022-02-15 13:13:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:48,962 INFO L470 AbstractCegarLoop]: Abstraction has 17148 states and 54506 transitions. [2022-02-15 13:13:48,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-15 13:13:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 54506 transitions. [2022-02-15 13:13:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:48,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:48,989 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:49,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-02-15 13:13:49,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-02-15 13:13:49,189 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1054671823, now seen corresponding path program 420 times [2022-02-15 13:13:49,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:49,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119637250] [2022-02-15 13:13:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:49,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:49,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:49,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119637250] [2022-02-15 13:13:49,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119637250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:49,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820140358] [2022-02-15 13:13:49,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:13:49,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:49,250 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:49,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-02-15 13:13:49,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:13:49,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:49,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:49,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:49,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:49,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820140358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:49,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:49,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 26 [2022-02-15 13:13:49,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860928069] [2022-02-15 13:13:49,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:49,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:13:49,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:13:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:13:49,452 INFO L87 Difference]: Start difference. First operand 17148 states and 54506 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:13:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:50,212 INFO L93 Difference]: Finished difference Result 19278 states and 60184 transitions. [2022-02-15 13:13:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:13:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 24 [2022-02-15 13:13:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:50,253 INFO L225 Difference]: With dead ends: 19278 [2022-02-15 13:13:50,253 INFO L226 Difference]: Without dead ends: 19278 [2022-02-15 13:13:50,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1413, Invalid=3699, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:13:50,254 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:50,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 357 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2022-02-15 13:13:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 17371. [2022-02-15 13:13:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.1773172135866434) internal successors, (55190), 17370 states have internal predecessors, (55190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 55190 transitions. [2022-02-15 13:13:50,622 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 55190 transitions. Word has length 24 [2022-02-15 13:13:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:50,622 INFO L470 AbstractCegarLoop]: Abstraction has 17371 states and 55190 transitions. [2022-02-15 13:13:50,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:13:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 55190 transitions. [2022-02-15 13:13:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:50,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:50,656 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:50,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Ended with exit code 0 [2022-02-15 13:13:50,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-02-15 13:13:50,856 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1264324815, now seen corresponding path program 421 times [2022-02-15 13:13:50,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:50,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031698] [2022-02-15 13:13:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:50,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:50,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:50,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031698] [2022-02-15 13:13:50,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031698] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:50,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454811916] [2022-02-15 13:13:50,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:13:50,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:50,912 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:50,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-02-15 13:13:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:51,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:51,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454811916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:51,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:51,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 25 [2022-02-15 13:13:51,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298749375] [2022-02-15 13:13:51,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:51,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:13:51,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:13:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:13:51,115 INFO L87 Difference]: Start difference. First operand 17371 states and 55190 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:13:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:51,911 INFO L93 Difference]: Finished difference Result 20178 states and 62903 transitions. [2022-02-15 13:13:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:13:51,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 24 [2022-02-15 13:13:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:51,968 INFO L225 Difference]: With dead ends: 20178 [2022-02-15 13:13:51,968 INFO L226 Difference]: Without dead ends: 20178 [2022-02-15 13:13:51,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1369, Invalid=3461, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:13:51,969 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 199 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:51,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 348 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:51,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20178 states. [2022-02-15 13:13:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20178 to 17685. [2022-02-15 13:13:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17685 states, 17684 states have (on average 3.17852295860665) internal successors, (56209), 17684 states have internal predecessors, (56209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17685 states to 17685 states and 56209 transitions. [2022-02-15 13:13:52,433 INFO L78 Accepts]: Start accepts. Automaton has 17685 states and 56209 transitions. Word has length 24 [2022-02-15 13:13:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:52,433 INFO L470 AbstractCegarLoop]: Abstraction has 17685 states and 56209 transitions. [2022-02-15 13:13:52,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:13:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17685 states and 56209 transitions. [2022-02-15 13:13:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:52,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:52,466 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:52,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-02-15 13:13:52,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:52,667 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1548182479, now seen corresponding path program 422 times [2022-02-15 13:13:52,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:52,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824971861] [2022-02-15 13:13:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:52,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:52,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:52,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824971861] [2022-02-15 13:13:52,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824971861] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:52,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955511770] [2022-02-15 13:13:52,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:13:52,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:52,717 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:52,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-02-15 13:13:52,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:13:52,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:52,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:52,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:52,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955511770] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:52,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:52,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 24 [2022-02-15 13:13:52,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499111944] [2022-02-15 13:13:52,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:52,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:13:52,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:13:52,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:13:52,912 INFO L87 Difference]: Start difference. First operand 17685 states and 56209 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-15 13:13:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:53,667 INFO L93 Difference]: Finished difference Result 21110 states and 65699 transitions. [2022-02-15 13:13:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:13:53,667 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 24 [2022-02-15 13:13:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:53,714 INFO L225 Difference]: With dead ends: 21110 [2022-02-15 13:13:53,714 INFO L226 Difference]: Without dead ends: 21110 [2022-02-15 13:13:53,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:13:53,715 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 226 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:53,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 271 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21110 states. [2022-02-15 13:13:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21110 to 18003. [2022-02-15 13:13:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18003 states, 18002 states have (on average 3.180702144206199) internal successors, (57259), 18002 states have internal predecessors, (57259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18003 states to 18003 states and 57259 transitions. [2022-02-15 13:13:54,092 INFO L78 Accepts]: Start accepts. Automaton has 18003 states and 57259 transitions. Word has length 24 [2022-02-15 13:13:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 18003 states and 57259 transitions. [2022-02-15 13:13:54,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-15 13:13:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18003 states and 57259 transitions. [2022-02-15 13:13:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:54,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:54,121 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:54,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Ended with exit code 0 [2022-02-15 13:13:54,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-02-15 13:13:54,321 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1490702129, now seen corresponding path program 423 times [2022-02-15 13:13:54,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:54,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791468393] [2022-02-15 13:13:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:54,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:54,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:54,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791468393] [2022-02-15 13:13:54,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791468393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:54,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999410209] [2022-02-15 13:13:54,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:13:54,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:54,366 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:54,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-02-15 13:13:54,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:13:54,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:54,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:54,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:54,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999410209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:54,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:54,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 23 [2022-02-15 13:13:54,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825854730] [2022-02-15 13:13:54,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:54,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:13:54,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:13:54,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:13:54,558 INFO L87 Difference]: Start difference. First operand 18003 states and 57259 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-02-15 13:13:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:55,359 INFO L93 Difference]: Finished difference Result 22604 states and 70090 transitions. [2022-02-15 13:13:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:13:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 24 [2022-02-15 13:13:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:55,407 INFO L225 Difference]: With dead ends: 22604 [2022-02-15 13:13:55,407 INFO L226 Difference]: Without dead ends: 22604 [2022-02-15 13:13:55,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:13:55,408 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 216 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:55,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 304 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2022-02-15 13:13:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 18724. [2022-02-15 13:13:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18723 states have (on average 3.182395983549645) internal successors, (59584), 18723 states have internal predecessors, (59584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 59584 transitions. [2022-02-15 13:13:55,856 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 59584 transitions. Word has length 24 [2022-02-15 13:13:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:55,856 INFO L470 AbstractCegarLoop]: Abstraction has 18724 states and 59584 transitions. [2022-02-15 13:13:55,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-02-15 13:13:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 59584 transitions. [2022-02-15 13:13:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:55,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:55,886 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:55,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Forceful destruction successful, exit code 0 [2022-02-15 13:13:56,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-02-15 13:13:56,086 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1865825329, now seen corresponding path program 424 times [2022-02-15 13:13:56,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:56,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290253342] [2022-02-15 13:13:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:56,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:56,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:56,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290253342] [2022-02-15 13:13:56,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290253342] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:56,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430701474] [2022-02-15 13:13:56,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:13:56,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:56,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:56,137 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:56,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-02-15 13:13:56,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:13:56,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:56,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:56,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:56,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:56,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430701474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:56,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:56,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-02-15 13:13:56,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522789368] [2022-02-15 13:13:56,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:56,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:56,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:56,313 INFO L87 Difference]: Start difference. First operand 18724 states and 59584 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:13:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:57,087 INFO L93 Difference]: Finished difference Result 26877 states and 83547 transitions. [2022-02-15 13:13:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:13:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2022-02-15 13:13:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:57,147 INFO L225 Difference]: With dead ends: 26877 [2022-02-15 13:13:57,147 INFO L226 Difference]: Without dead ends: 26877 [2022-02-15 13:13:57,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:13:57,148 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 250 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:57,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 275 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:13:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26877 states. [2022-02-15 13:13:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26877 to 23210. [2022-02-15 13:13:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 23209 states have (on average 3.1894092808824164) internal successors, (74023), 23209 states have internal predecessors, (74023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:13:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 74023 transitions. [2022-02-15 13:13:57,684 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 74023 transitions. Word has length 24 [2022-02-15 13:13:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:13:57,684 INFO L470 AbstractCegarLoop]: Abstraction has 23210 states and 74023 transitions. [2022-02-15 13:13:57,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:13:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 74023 transitions. [2022-02-15 13:13:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:13:57,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:13:57,717 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:13:57,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-02-15 13:13:57,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-02-15 13:13:57,917 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:13:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:13:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1294370523, now seen corresponding path program 425 times [2022-02-15 13:13:57,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:13:57,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005663990] [2022-02-15 13:13:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:13:57,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:13:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:13:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:57,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:13:57,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005663990] [2022-02-15 13:13:57,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005663990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:13:57,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463908688] [2022-02-15 13:13:57,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:13:57,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:13:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:13:57,960 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:13:57,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-02-15 13:13:57,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:13:57,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:13:57,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:13:57,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:13:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:13:58,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:13:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:13:58,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463908688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:13:58,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:13:58,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10] total 22 [2022-02-15 13:13:58,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070202243] [2022-02-15 13:13:58,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:13:58,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:13:58,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:13:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:13:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:13:58,136 INFO L87 Difference]: Start difference. First operand 23210 states and 74023 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:13:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:13:59,472 INFO L93 Difference]: Finished difference Result 25835 states and 80460 transitions. [2022-02-15 13:13:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-15 13:13:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2022-02-15 13:13:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:13:59,557 INFO L225 Difference]: With dead ends: 25835 [2022-02-15 13:13:59,557 INFO L226 Difference]: Without dead ends: 25829 [2022-02-15 13:13:59,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4978 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2022-02-15 13:13:59,558 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 250 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:13:59,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 193 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:13:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25829 states. [2022-02-15 13:14:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25829 to 23125. [2022-02-15 13:14:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23125 states, 23124 states have (on average 3.187900017298045) internal successors, (73717), 23124 states have internal predecessors, (73717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23125 states to 23125 states and 73717 transitions. [2022-02-15 13:14:00,136 INFO L78 Accepts]: Start accepts. Automaton has 23125 states and 73717 transitions. Word has length 24 [2022-02-15 13:14:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:00,136 INFO L470 AbstractCegarLoop]: Abstraction has 23125 states and 73717 transitions. [2022-02-15 13:14:00,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2022-02-15 13:14:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 23125 states and 73717 transitions. [2022-02-15 13:14:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:14:00,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:00,180 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:00,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-02-15 13:14:00,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:00,380 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash -759140721, now seen corresponding path program 426 times [2022-02-15 13:14:00,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:00,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736012131] [2022-02-15 13:14:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:00,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:00,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:00,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736012131] [2022-02-15 13:14:00,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736012131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:00,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919279530] [2022-02-15 13:14:00,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:14:00,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:00,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:00,428 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:00,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-02-15 13:14:00,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:14:00,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:00,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:14:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:00,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:00,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919279530] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:00,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:00,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 11] total 23 [2022-02-15 13:14:00,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220480604] [2022-02-15 13:14:00,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:00,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:14:00,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:14:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:14:00,610 INFO L87 Difference]: Start difference. First operand 23125 states and 73717 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-02-15 13:14:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:01,761 INFO L93 Difference]: Finished difference Result 25817 states and 80521 transitions. [2022-02-15 13:14:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 13:14:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 24 [2022-02-15 13:14:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:01,823 INFO L225 Difference]: With dead ends: 25817 [2022-02-15 13:14:01,823 INFO L226 Difference]: Without dead ends: 25805 [2022-02-15 13:14:01,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 13:14:01,825 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 241 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:01,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 218 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:14:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25805 states. [2022-02-15 13:14:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25805 to 23100. [2022-02-15 13:14:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23100 states, 23099 states have (on average 3.188536300272739) internal successors, (73652), 23099 states have internal predecessors, (73652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 73652 transitions. [2022-02-15 13:14:02,409 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 73652 transitions. Word has length 24 [2022-02-15 13:14:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:02,410 INFO L470 AbstractCegarLoop]: Abstraction has 23100 states and 73652 transitions. [2022-02-15 13:14:02,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-02-15 13:14:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 73652 transitions. [2022-02-15 13:14:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:14:02,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:02,446 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:02,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-02-15 13:14:02,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2022-02-15 13:14:02,646 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1346886043, now seen corresponding path program 427 times [2022-02-15 13:14:02,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:02,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910053651] [2022-02-15 13:14:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:02,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:02,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:02,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910053651] [2022-02-15 13:14:02,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910053651] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:02,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946027787] [2022-02-15 13:14:02,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:14:02,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:02,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:02,698 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:02,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-02-15 13:14:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:02,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:14:02,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:02,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:02,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946027787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:02,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:02,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 24 [2022-02-15 13:14:02,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367725911] [2022-02-15 13:14:02,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:02,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:14:02,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:14:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:14:02,883 INFO L87 Difference]: Start difference. First operand 23100 states and 73652 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-15 13:14:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:03,931 INFO L93 Difference]: Finished difference Result 25937 states and 80963 transitions. [2022-02-15 13:14:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:14:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 24 [2022-02-15 13:14:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:03,995 INFO L225 Difference]: With dead ends: 25937 [2022-02-15 13:14:03,995 INFO L226 Difference]: Without dead ends: 25919 [2022-02-15 13:14:03,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 13:14:03,997 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 236 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:03,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 224 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:14:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2022-02-15 13:14:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 23155. [2022-02-15 13:14:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23155 states, 23154 states have (on average 3.18916817828453) internal successors, (73842), 23154 states have internal predecessors, (73842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 73842 transitions. [2022-02-15 13:14:04,525 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 73842 transitions. Word has length 24 [2022-02-15 13:14:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:04,525 INFO L470 AbstractCegarLoop]: Abstraction has 23155 states and 73842 transitions. [2022-02-15 13:14:04,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-02-15 13:14:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 73842 transitions. [2022-02-15 13:14:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:14:04,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:04,560 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:04,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Ended with exit code 0 [2022-02-15 13:14:04,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:04,760 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:04,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1907845455, now seen corresponding path program 428 times [2022-02-15 13:14:04,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:04,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478106992] [2022-02-15 13:14:04,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:04,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:04,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:04,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478106992] [2022-02-15 13:14:04,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478106992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:04,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088660445] [2022-02-15 13:14:04,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:14:04,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:04,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:04,817 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:04,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-02-15 13:14:04,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:14:04,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:04,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:14:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:04,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:05,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088660445] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:05,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:05,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 25 [2022-02-15 13:14:05,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148763909] [2022-02-15 13:14:05,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:05,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:14:05,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:14:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:14:05,005 INFO L87 Difference]: Start difference. First operand 23155 states and 73842 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:14:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:06,046 INFO L93 Difference]: Finished difference Result 26264 states and 82006 transitions. [2022-02-15 13:14:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:14:06,047 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 24 [2022-02-15 13:14:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:06,116 INFO L225 Difference]: With dead ends: 26264 [2022-02-15 13:14:06,116 INFO L226 Difference]: Without dead ends: 26240 [2022-02-15 13:14:06,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 13:14:06,117 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 243 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:06,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 207 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:14:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2022-02-15 13:14:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23691. [2022-02-15 13:14:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23691 states, 23690 states have (on average 3.1908400168847617) internal successors, (75591), 23690 states have internal predecessors, (75591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 75591 transitions. [2022-02-15 13:14:06,651 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 75591 transitions. Word has length 24 [2022-02-15 13:14:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:06,651 INFO L470 AbstractCegarLoop]: Abstraction has 23691 states and 75591 transitions. [2022-02-15 13:14:06,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:14:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 75591 transitions. [2022-02-15 13:14:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:14:06,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:06,688 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:06,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Ended with exit code 0 [2022-02-15 13:14:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-02-15 13:14:06,888 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -274693211, now seen corresponding path program 429 times [2022-02-15 13:14:06,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:06,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386404067] [2022-02-15 13:14:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:06,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:06,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:06,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386404067] [2022-02-15 13:14:06,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386404067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:06,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744782854] [2022-02-15 13:14:06,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:14:06,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:06,951 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:06,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-02-15 13:14:06,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:14:06,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:06,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:14:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:07,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:07,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744782854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:07,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:07,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 26 [2022-02-15 13:14:07,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224217917] [2022-02-15 13:14:07,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:07,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:14:07,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:07,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:14:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:14:07,148 INFO L87 Difference]: Start difference. First operand 23691 states and 75591 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:14:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:08,146 INFO L93 Difference]: Finished difference Result 26956 states and 84218 transitions. [2022-02-15 13:14:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 13:14:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 24 [2022-02-15 13:14:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:08,236 INFO L225 Difference]: With dead ends: 26956 [2022-02-15 13:14:08,236 INFO L226 Difference]: Without dead ends: 26926 [2022-02-15 13:14:08,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:14:08,237 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 254 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:08,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 206 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:14:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2022-02-15 13:14:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 24343. [2022-02-15 13:14:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24343 states, 24342 states have (on average 3.1921370470791226) internal successors, (77703), 24342 states have internal predecessors, (77703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24343 states to 24343 states and 77703 transitions. [2022-02-15 13:14:08,957 INFO L78 Accepts]: Start accepts. Automaton has 24343 states and 77703 transitions. Word has length 24 [2022-02-15 13:14:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:08,957 INFO L470 AbstractCegarLoop]: Abstraction has 24343 states and 77703 transitions. [2022-02-15 13:14:08,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:14:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 24343 states and 77703 transitions. [2022-02-15 13:14:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:14:09,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:09,003 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:09,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Ended with exit code 0 [2022-02-15 13:14:09,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-02-15 13:14:09,204 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash 786084879, now seen corresponding path program 430 times [2022-02-15 13:14:09,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:09,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949069221] [2022-02-15 13:14:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:09,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:09,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:09,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949069221] [2022-02-15 13:14:09,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949069221] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:09,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100770989] [2022-02-15 13:14:09,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:14:09,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:09,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:09,288 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:09,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-02-15 13:14:09,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:14:09,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-15 13:14:09,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:09,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:09,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100770989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:09,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:09,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-02-15 13:14:09,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452312706] [2022-02-15 13:14:09,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:09,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:14:09,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:14:09,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:14:09,517 INFO L87 Difference]: Start difference. First operand 24343 states and 77703 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-15 13:14:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:10,386 INFO L93 Difference]: Finished difference Result 26813 states and 84024 transitions. [2022-02-15 13:14:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:14:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 24 [2022-02-15 13:14:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:10,475 INFO L225 Difference]: With dead ends: 26813 [2022-02-15 13:14:10,475 INFO L226 Difference]: Without dead ends: 26777 [2022-02-15 13:14:10,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 13:14:10,477 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:10,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 170 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:14:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26777 states. [2022-02-15 13:14:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26777 to 24407. [2022-02-15 13:14:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 24406 states have (on average 3.1917561255428994) internal successors, (77898), 24406 states have internal predecessors, (77898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 77898 transitions. [2022-02-15 13:14:11,139 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 77898 transitions. Word has length 24 [2022-02-15 13:14:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:11,139 INFO L470 AbstractCegarLoop]: Abstraction has 24407 states and 77898 transitions. [2022-02-15 13:14:11,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2022-02-15 13:14:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 77898 transitions. [2022-02-15 13:14:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:11,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:11,185 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:11,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Forceful destruction successful, exit code 0 [2022-02-15 13:14:11,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:11,385 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1988058889, now seen corresponding path program 431 times [2022-02-15 13:14:11,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:11,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302756202] [2022-02-15 13:14:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:11,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:11,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:11,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302756202] [2022-02-15 13:14:11,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302756202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:11,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793915119] [2022-02-15 13:14:11,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:14:11,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:11,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:11,586 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:11,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-02-15 13:14:11,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:14:11,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:11,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:12,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793915119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:12,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:12,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-02-15 13:14:12,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708683130] [2022-02-15 13:14:12,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:12,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:14:12,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:14:12,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:14:12,250 INFO L87 Difference]: Start difference. First operand 24407 states and 77898 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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) [2022-02-15 13:14:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:13,118 INFO L93 Difference]: Finished difference Result 24899 states and 78823 transitions. [2022-02-15 13:14:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:14:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:13,202 INFO L225 Difference]: With dead ends: 24899 [2022-02-15 13:14:13,202 INFO L226 Difference]: Without dead ends: 24867 [2022-02-15 13:14:13,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:13,202 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 221 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:13,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 888 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:14:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2022-02-15 13:14:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 24479. [2022-02-15 13:14:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 3.185145845248795) internal successors, (77966), 24478 states have internal predecessors, (77966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 77966 transitions. [2022-02-15 13:14:13,741 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 77966 transitions. Word has length 25 [2022-02-15 13:14:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:13,741 INFO L470 AbstractCegarLoop]: Abstraction has 24479 states and 77966 transitions. [2022-02-15 13:14:13,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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) [2022-02-15 13:14:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 77966 transitions. [2022-02-15 13:14:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:13,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:13,780 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:13,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-02-15 13:14:13,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-02-15 13:14:13,981 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 421650923, now seen corresponding path program 432 times [2022-02-15 13:14:13,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:13,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225310741] [2022-02-15 13:14:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:13,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:14,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:14,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225310741] [2022-02-15 13:14:14,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225310741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:14,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530022234] [2022-02-15 13:14:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:14:14,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:14,149 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:14,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-02-15 13:14:14,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:14:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:14,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:14,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:14,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530022234] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:14,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:14,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-02-15 13:14:14,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935711476] [2022-02-15 13:14:14,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:14,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:14:14,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:14:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:14:14,813 INFO L87 Difference]: Start difference. First operand 24479 states and 77966 transitions. Second operand has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 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) [2022-02-15 13:14:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:15,506 INFO L93 Difference]: Finished difference Result 25039 states and 79187 transitions. [2022-02-15 13:14:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:14:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:15,590 INFO L225 Difference]: With dead ends: 25039 [2022-02-15 13:14:15,591 INFO L226 Difference]: Without dead ends: 25032 [2022-02-15 13:14:15,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:15,591 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 263 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:15,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 995 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25032 states. [2022-02-15 13:14:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25032 to 24640. [2022-02-15 13:14:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24640 states, 24639 states have (on average 3.186979991071066) internal successors, (78524), 24639 states have internal predecessors, (78524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24640 states to 24640 states and 78524 transitions. [2022-02-15 13:14:16,253 INFO L78 Accepts]: Start accepts. Automaton has 24640 states and 78524 transitions. Word has length 25 [2022-02-15 13:14:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:16,253 INFO L470 AbstractCegarLoop]: Abstraction has 24640 states and 78524 transitions. [2022-02-15 13:14:16,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 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) [2022-02-15 13:14:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 24640 states and 78524 transitions. [2022-02-15 13:14:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:16,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:16,300 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:16,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Ended with exit code 0 [2022-02-15 13:14:16,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2022-02-15 13:14:16,500 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2036353647, now seen corresponding path program 433 times [2022-02-15 13:14:16,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:16,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874130629] [2022-02-15 13:14:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:16,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:16,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:16,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874130629] [2022-02-15 13:14:16,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874130629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:16,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032869665] [2022-02-15 13:14:16,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:14:16,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:16,672 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:16,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-02-15 13:14:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:16,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:16,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:16,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:17,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032869665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:17,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:17,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-02-15 13:14:17,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962159477] [2022-02-15 13:14:17,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:17,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:14:17,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:17,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:14:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:14:17,347 INFO L87 Difference]: Start difference. First operand 24640 states and 78524 transitions. Second operand has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-02-15 13:14:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:18,088 INFO L93 Difference]: Finished difference Result 25025 states and 79167 transitions. [2022-02-15 13:14:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:14:18,089 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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 25 [2022-02-15 13:14:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:18,150 INFO L225 Difference]: With dead ends: 25025 [2022-02-15 13:14:18,150 INFO L226 Difference]: Without dead ends: 25009 [2022-02-15 13:14:18,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:14:18,151 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 250 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:18,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 1028 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25009 states. [2022-02-15 13:14:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25009 to 24488. [2022-02-15 13:14:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-02-15 13:14:18,739 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-02-15 13:14:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:18,739 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-02-15 13:14:18,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-02-15 13:14:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-02-15 13:14:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:18,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:18,776 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:18,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Ended with exit code 0 [2022-02-15 13:14:18,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-02-15 13:14:18,977 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:18,977 INFO L85 PathProgramCache]: Analyzing trace with hash 993105729, now seen corresponding path program 434 times [2022-02-15 13:14:18,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:18,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525611841] [2022-02-15 13:14:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:18,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:19,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:19,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525611841] [2022-02-15 13:14:19,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525611841] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:19,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763389428] [2022-02-15 13:14:19,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:14:19,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:19,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:19,144 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:19,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-02-15 13:14:19,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:14:19,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:19,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:19,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:19,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:19,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763389428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:19,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:19,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-02-15 13:14:19,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666605217] [2022-02-15 13:14:19,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:19,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:14:19,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:19,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:14:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:14:19,828 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 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) [2022-02-15 13:14:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:20,549 INFO L93 Difference]: Finished difference Result 24884 states and 78643 transitions. [2022-02-15 13:14:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:14:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 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 25 [2022-02-15 13:14:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:20,611 INFO L225 Difference]: With dead ends: 24884 [2022-02-15 13:14:20,611 INFO L226 Difference]: Without dead ends: 24877 [2022-02-15 13:14:20,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=1358, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:20,611 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 177 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:20,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1022 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2022-02-15 13:14:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 24488. [2022-02-15 13:14:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-02-15 13:14:21,133 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-02-15 13:14:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:21,134 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-02-15 13:14:21,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 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) [2022-02-15 13:14:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-02-15 13:14:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:21,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:21,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:21,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Ended with exit code 0 [2022-02-15 13:14:21,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:21,372 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1528335531, now seen corresponding path program 435 times [2022-02-15 13:14:21,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:21,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308582779] [2022-02-15 13:14:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:21,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:21,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:21,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308582779] [2022-02-15 13:14:21,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308582779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:21,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047279718] [2022-02-15 13:14:21,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:14:21,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:21,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:21,552 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:21,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-02-15 13:14:21,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:14:21,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:21,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:22,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047279718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:22,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:22,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-02-15 13:14:22,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760532728] [2022-02-15 13:14:22,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:22,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:14:22,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:22,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:14:22,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:14:22,277 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:23,085 INFO L93 Difference]: Finished difference Result 24901 states and 78668 transitions. [2022-02-15 13:14:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:14:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:23,147 INFO L225 Difference]: With dead ends: 24901 [2022-02-15 13:14:23,147 INFO L226 Difference]: Without dead ends: 24894 [2022-02-15 13:14:23,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:23,148 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 225 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:23,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1103 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:14:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2022-02-15 13:14:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 24488. [2022-02-15 13:14:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-02-15 13:14:23,695 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-02-15 13:14:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:23,695 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-02-15 13:14:23,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-02-15 13:14:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:23,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:23,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:23,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-02-15 13:14:23,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:23,936 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 940590209, now seen corresponding path program 436 times [2022-02-15 13:14:23,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:23,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080167039] [2022-02-15 13:14:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:23,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:24,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:24,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080167039] [2022-02-15 13:14:24,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080167039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:24,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306979021] [2022-02-15 13:14:24,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:14:24,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:24,117 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:24,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-02-15 13:14:24,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:14:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:24,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:24,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306979021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:24,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:24,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-02-15 13:14:24,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685938392] [2022-02-15 13:14:24,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:24,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:14:24,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:14:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:14:24,777 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 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) [2022-02-15 13:14:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:25,660 INFO L93 Difference]: Finished difference Result 24921 states and 78698 transitions. [2022-02-15 13:14:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:14:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 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 [2022-02-15 13:14:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:25,716 INFO L225 Difference]: With dead ends: 24921 [2022-02-15 13:14:25,717 INFO L226 Difference]: Without dead ends: 24914 [2022-02-15 13:14:25,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:25,717 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 244 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:25,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 975 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2022-02-15 13:14:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 24488. [2022-02-15 13:14:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-02-15 13:14:26,203 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-02-15 13:14:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:26,203 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-02-15 13:14:26,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 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) [2022-02-15 13:14:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-02-15 13:14:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:26,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:26,241 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:26,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Ended with exit code 0 [2022-02-15 13:14:26,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2022-02-15 13:14:26,441 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash -99645589, now seen corresponding path program 437 times [2022-02-15 13:14:26,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:26,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703775945] [2022-02-15 13:14:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:26,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:26,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:26,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703775945] [2022-02-15 13:14:26,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703775945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:26,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181429627] [2022-02-15 13:14:26,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:14:26,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:26,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:26,625 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:26,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-02-15 13:14:26,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:14:26,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:26,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:27,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181429627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:27,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:27,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-02-15 13:14:27,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859428443] [2022-02-15 13:14:27,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:27,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:14:27,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:27,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:14:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:14:27,248 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 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) [2022-02-15 13:14:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:28,089 INFO L93 Difference]: Finished difference Result 24944 states and 78733 transitions. [2022-02-15 13:14:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:14:28,090 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:28,153 INFO L225 Difference]: With dead ends: 24944 [2022-02-15 13:14:28,154 INFO L226 Difference]: Without dead ends: 24937 [2022-02-15 13:14:28,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:28,154 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 231 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:28,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 977 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:14:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24937 states. [2022-02-15 13:14:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 24488. [2022-02-15 13:14:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-02-15 13:14:28,755 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-02-15 13:14:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:28,755 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-02-15 13:14:28,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 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) [2022-02-15 13:14:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-02-15 13:14:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:28,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:28,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:28,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-02-15 13:14:28,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:28,993 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:28,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2012783041, now seen corresponding path program 438 times [2022-02-15 13:14:28,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:28,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879520876] [2022-02-15 13:14:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:28,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:29,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:29,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879520876] [2022-02-15 13:14:29,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879520876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:29,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163005438] [2022-02-15 13:14:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:14:29,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:29,181 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:29,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-02-15 13:14:29,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:14:29,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:29,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:29,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:29,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:29,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163005438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:29,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:29,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2022-02-15 13:14:29,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106265064] [2022-02-15 13:14:29,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:29,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:14:29,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:14:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:14:29,781 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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) [2022-02-15 13:14:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:30,685 INFO L93 Difference]: Finished difference Result 24802 states and 78491 transitions. [2022-02-15 13:14:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:14:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:30,741 INFO L225 Difference]: With dead ends: 24802 [2022-02-15 13:14:30,741 INFO L226 Difference]: Without dead ends: 24795 [2022-02-15 13:14:30,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:30,741 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 151 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:30,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1069 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:14:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24795 states. [2022-02-15 13:14:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24795 to 24488. [2022-02-15 13:14:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2022-02-15 13:14:31,398 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2022-02-15 13:14:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:31,399 INFO L470 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2022-02-15 13:14:31,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 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) [2022-02-15 13:14:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2022-02-15 13:14:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:31,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:31,430 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:31,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Forceful destruction successful, exit code 0 [2022-02-15 13:14:31,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:31,631 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1055569447, now seen corresponding path program 439 times [2022-02-15 13:14:31,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:31,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637560501] [2022-02-15 13:14:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:31,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:31,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:31,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637560501] [2022-02-15 13:14:31,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637560501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:31,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122620286] [2022-02-15 13:14:31,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:14:31,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:31,797 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:31,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-02-15 13:14:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:32,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:32,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122620286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:32,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:32,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 36 [2022-02-15 13:14:32,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559883195] [2022-02-15 13:14:32,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:32,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:14:32,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:14:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:14:32,550 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 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) [2022-02-15 13:14:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:33,092 INFO L93 Difference]: Finished difference Result 25074 states and 79435 transitions. [2022-02-15 13:14:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:14:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 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 25 [2022-02-15 13:14:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:33,179 INFO L225 Difference]: With dead ends: 25074 [2022-02-15 13:14:33,179 INFO L226 Difference]: Without dead ends: 25067 [2022-02-15 13:14:33,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:33,180 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 169 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:33,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 721 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:14:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25067 states. [2022-02-15 13:14:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25067 to 24661. [2022-02-15 13:14:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1872668288726684) internal successors, (78598), 24660 states have internal predecessors, (78598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78598 transitions. [2022-02-15 13:14:33,946 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78598 transitions. Word has length 25 [2022-02-15 13:14:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:33,946 INFO L470 AbstractCegarLoop]: Abstraction has 24661 states and 78598 transitions. [2022-02-15 13:14:33,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 36 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) [2022-02-15 13:14:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78598 transitions. [2022-02-15 13:14:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:33,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:33,993 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:34,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-02-15 13:14:34,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:34,193 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1624695125, now seen corresponding path program 440 times [2022-02-15 13:14:34,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:34,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720888671] [2022-02-15 13:14:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:34,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:34,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:34,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720888671] [2022-02-15 13:14:34,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720888671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:34,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948271245] [2022-02-15 13:14:34,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:14:34,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:34,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:34,361 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:34,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-02-15 13:14:34,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:14:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:34,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:35,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948271245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:35,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:35,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 35 [2022-02-15 13:14:35,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484935249] [2022-02-15 13:14:35,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:35,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:14:35,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:14:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:14:35,102 INFO L87 Difference]: Start difference. First operand 24661 states and 78598 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:35,645 INFO L93 Difference]: Finished difference Result 25075 states and 79432 transitions. [2022-02-15 13:14:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:14:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:35,729 INFO L225 Difference]: With dead ends: 25075 [2022-02-15 13:14:35,729 INFO L226 Difference]: Without dead ends: 25066 [2022-02-15 13:14:35,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:14:35,730 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 208 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:35,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 700 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:14:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25066 states. [2022-02-15 13:14:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25066 to 24661. [2022-02-15 13:14:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2022-02-15 13:14:36,468 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2022-02-15 13:14:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:36,468 INFO L470 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2022-02-15 13:14:36,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2022-02-15 13:14:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:36,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:36,513 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:36,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Forceful destruction successful, exit code 0 [2022-02-15 13:14:36,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2022-02-15 13:14:36,714 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash 590978343, now seen corresponding path program 441 times [2022-02-15 13:14:36,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:36,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183839985] [2022-02-15 13:14:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:36,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:36,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:36,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183839985] [2022-02-15 13:14:36,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183839985] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:36,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396612164] [2022-02-15 13:14:36,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:14:36,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:36,887 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:36,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-02-15 13:14:36,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:14:36,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:36,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:37,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:37,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396612164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:37,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:37,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-02-15 13:14:37,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203808044] [2022-02-15 13:14:37,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:37,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:14:37,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:37,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:14:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:14:37,741 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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) [2022-02-15 13:14:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:38,417 INFO L93 Difference]: Finished difference Result 24947 states and 79111 transitions. [2022-02-15 13:14:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:14:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 25 [2022-02-15 13:14:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:38,505 INFO L225 Difference]: With dead ends: 24947 [2022-02-15 13:14:38,506 INFO L226 Difference]: Without dead ends: 24940 [2022-02-15 13:14:38,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:14:38,506 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 174 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:38,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 861 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:14:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2022-02-15 13:14:39,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 24661. [2022-02-15 13:14:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2022-02-15 13:14:39,123 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2022-02-15 13:14:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:39,123 INFO L470 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2022-02-15 13:14:39,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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) [2022-02-15 13:14:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2022-02-15 13:14:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:39,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:39,169 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:39,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Forceful destruction successful, exit code 0 [2022-02-15 13:14:39,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-02-15 13:14:39,370 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash -767792789, now seen corresponding path program 442 times [2022-02-15 13:14:39,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:39,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152001618] [2022-02-15 13:14:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:39,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:39,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:39,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152001618] [2022-02-15 13:14:39,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152001618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:39,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790268566] [2022-02-15 13:14:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:14:39,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:39,543 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:39,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-02-15 13:14:39,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:14:39,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:39,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:40,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790268566] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:40,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:40,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 36 [2022-02-15 13:14:40,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104665340] [2022-02-15 13:14:40,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:40,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:14:40,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:14:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:14:40,346 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:41,029 INFO L93 Difference]: Finished difference Result 25694 states and 81409 transitions. [2022-02-15 13:14:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:14:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:41,096 INFO L225 Difference]: With dead ends: 25694 [2022-02-15 13:14:41,096 INFO L226 Difference]: Without dead ends: 25677 [2022-02-15 13:14:41,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:14:41,097 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 216 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:41,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1001 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2022-02-15 13:14:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 25073. [2022-02-15 13:14:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 3.1924058710912573) internal successors, (80040), 25072 states have internal predecessors, (80040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 80040 transitions. [2022-02-15 13:14:41,667 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 80040 transitions. Word has length 25 [2022-02-15 13:14:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:41,667 INFO L470 AbstractCegarLoop]: Abstraction has 25073 states and 80040 transitions. [2022-02-15 13:14:41,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 80040 transitions. [2022-02-15 13:14:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:41,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:41,705 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:41,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-02-15 13:14:41,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-02-15 13:14:41,906 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:41,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash 846909935, now seen corresponding path program 443 times [2022-02-15 13:14:41,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:41,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314503984] [2022-02-15 13:14:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:41,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:42,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:42,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314503984] [2022-02-15 13:14:42,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314503984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:42,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905691981] [2022-02-15 13:14:42,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:14:42,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:42,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:42,070 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:42,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-02-15 13:14:42,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:14:42,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:42,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:42,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:42,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905691981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:42,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:42,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 35 [2022-02-15 13:14:42,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750262018] [2022-02-15 13:14:42,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:42,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:14:42,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:14:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:14:42,777 INFO L87 Difference]: Start difference. First operand 25073 states and 80040 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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) [2022-02-15 13:14:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:43,590 INFO L93 Difference]: Finished difference Result 25700 states and 81360 transitions. [2022-02-15 13:14:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:14:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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 25 [2022-02-15 13:14:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:43,657 INFO L225 Difference]: With dead ends: 25700 [2022-02-15 13:14:43,657 INFO L226 Difference]: Without dead ends: 25682 [2022-02-15 13:14:43,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:14:43,657 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 203 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:43,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1237 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2022-02-15 13:14:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24970. [2022-02-15 13:14:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24970 states, 24969 states have (on average 3.1887140053666547) internal successors, (79619), 24969 states have internal predecessors, (79619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24970 states to 24970 states and 79619 transitions. [2022-02-15 13:14:44,205 INFO L78 Accepts]: Start accepts. Automaton has 24970 states and 79619 transitions. Word has length 25 [2022-02-15 13:14:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:44,205 INFO L470 AbstractCegarLoop]: Abstraction has 24970 states and 79619 transitions. [2022-02-15 13:14:44,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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) [2022-02-15 13:14:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24970 states and 79619 transitions. [2022-02-15 13:14:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:44,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:44,244 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:44,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-02-15 13:14:44,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:44,444 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1232383893, now seen corresponding path program 444 times [2022-02-15 13:14:44,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:44,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59982684] [2022-02-15 13:14:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:44,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:44,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:44,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59982684] [2022-02-15 13:14:44,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59982684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:44,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3313519] [2022-02-15 13:14:44,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:14:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:44,635 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:44,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-02-15 13:14:44,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:14:44,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:44,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:45,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3313519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:45,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:45,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 34 [2022-02-15 13:14:45,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236354030] [2022-02-15 13:14:45,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:45,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:14:45,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:45,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:14:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:14:45,352 INFO L87 Difference]: Start difference. First operand 24970 states and 79619 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:46,143 INFO L93 Difference]: Finished difference Result 25480 states and 80657 transitions. [2022-02-15 13:14:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:14:46,144 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:46,208 INFO L225 Difference]: With dead ends: 25480 [2022-02-15 13:14:46,208 INFO L226 Difference]: Without dead ends: 25458 [2022-02-15 13:14:46,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:14:46,209 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 205 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:46,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1091 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2022-02-15 13:14:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24939. [2022-02-15 13:14:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2022-02-15 13:14:46,843 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2022-02-15 13:14:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:46,843 INFO L470 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2022-02-15 13:14:46,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2022-02-15 13:14:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:46,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:46,881 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:46,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-02-15 13:14:47,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2022-02-15 13:14:47,082 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1265983121, now seen corresponding path program 445 times [2022-02-15 13:14:47,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:47,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322235514] [2022-02-15 13:14:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:47,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:47,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:47,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322235514] [2022-02-15 13:14:47,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322235514] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:47,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148974647] [2022-02-15 13:14:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:14:47,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:47,255 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:47,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-02-15 13:14:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:47,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:47,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:47,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148974647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:47,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:47,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-02-15 13:14:47,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661723593] [2022-02-15 13:14:47,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:47,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:14:47,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:14:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:14:47,925 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:48,660 INFO L93 Difference]: Finished difference Result 25309 states and 80217 transitions. [2022-02-15 13:14:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:14:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:48,739 INFO L225 Difference]: With dead ends: 25309 [2022-02-15 13:14:48,739 INFO L226 Difference]: Without dead ends: 25302 [2022-02-15 13:14:48,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:14:48,740 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 179 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:48,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 934 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25302 states. [2022-02-15 13:14:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25302 to 24939. [2022-02-15 13:14:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2022-02-15 13:14:49,397 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2022-02-15 13:14:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:49,397 INFO L470 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2022-02-15 13:14:49,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2022-02-15 13:14:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:49,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:49,445 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:49,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Forceful destruction successful, exit code 0 [2022-02-15 13:14:49,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2022-02-15 13:14:49,645 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash -238350399, now seen corresponding path program 446 times [2022-02-15 13:14:49,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:49,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105962143] [2022-02-15 13:14:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:49,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:49,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:49,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105962143] [2022-02-15 13:14:49,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105962143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:49,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220389589] [2022-02-15 13:14:49,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:14:49,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:49,816 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:49,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-02-15 13:14:49,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:14:49,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:14:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:50,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220389589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:50,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:50,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-02-15 13:14:50,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589726310] [2022-02-15 13:14:50,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:50,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:14:50,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:14:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:14:50,615 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:51,221 INFO L93 Difference]: Finished difference Result 25226 states and 80018 transitions. [2022-02-15 13:14:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:14:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:51,304 INFO L225 Difference]: With dead ends: 25226 [2022-02-15 13:14:51,305 INFO L226 Difference]: Without dead ends: 25213 [2022-02-15 13:14:51,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:14:51,305 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 225 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:51,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 816 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:14:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2022-02-15 13:14:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 24914. [2022-02-15 13:14:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24914 states, 24913 states have (on average 3.1877333119255007) internal successors, (79416), 24913 states have internal predecessors, (79416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 79416 transitions. [2022-02-15 13:14:51,970 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 79416 transitions. Word has length 25 [2022-02-15 13:14:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:51,971 INFO L470 AbstractCegarLoop]: Abstraction has 24914 states and 79416 transitions. [2022-02-15 13:14:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 79416 transitions. [2022-02-15 13:14:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:52,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:52,018 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:52,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-02-15 13:14:52,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-02-15 13:14:52,218 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:52,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1457447257, now seen corresponding path program 447 times [2022-02-15 13:14:52,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:52,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090256927] [2022-02-15 13:14:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:52,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:52,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:52,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090256927] [2022-02-15 13:14:52,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090256927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:52,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990926749] [2022-02-15 13:14:52,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:14:52,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:52,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:52,390 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:52,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-02-15 13:14:52,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:14:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:52,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:53,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990926749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:53,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:53,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 36 [2022-02-15 13:14:53,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148854989] [2022-02-15 13:14:53,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:53,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:14:53,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:14:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:14:53,105 INFO L87 Difference]: Start difference. First operand 24914 states and 79416 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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) [2022-02-15 13:14:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:53,855 INFO L93 Difference]: Finished difference Result 26019 states and 82469 transitions. [2022-02-15 13:14:53,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:14:53,855 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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 25 [2022-02-15 13:14:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:53,942 INFO L225 Difference]: With dead ends: 26019 [2022-02-15 13:14:53,942 INFO L226 Difference]: Without dead ends: 26002 [2022-02-15 13:14:53,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:14:53,942 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 252 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:53,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1099 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2022-02-15 13:14:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 25397. [2022-02-15 13:14:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25397 states, 25396 states have (on average 3.193416286029296) internal successors, (81100), 25396 states have internal predecessors, (81100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25397 states to 25397 states and 81100 transitions. [2022-02-15 13:14:54,672 INFO L78 Accepts]: Start accepts. Automaton has 25397 states and 81100 transitions. Word has length 25 [2022-02-15 13:14:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:54,672 INFO L470 AbstractCegarLoop]: Abstraction has 25397 states and 81100 transitions. [2022-02-15 13:14:54,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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) [2022-02-15 13:14:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 25397 states and 81100 transitions. [2022-02-15 13:14:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:54,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:54,721 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:54,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-02-15 13:14:54,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:54,922 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash 157255467, now seen corresponding path program 448 times [2022-02-15 13:14:54,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:54,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078328365] [2022-02-15 13:14:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:54,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:55,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:55,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078328365] [2022-02-15 13:14:55,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078328365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:55,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958852038] [2022-02-15 13:14:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:14:55,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:55,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:55,089 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:55,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-02-15 13:14:55,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:14:55,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:55,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:55,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:55,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958852038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:55,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:55,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 35 [2022-02-15 13:14:55,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910431084] [2022-02-15 13:14:55,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:55,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:14:55,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:14:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:14:55,800 INFO L87 Difference]: Start difference. First operand 25397 states and 81100 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:56,582 INFO L93 Difference]: Finished difference Result 26023 states and 82394 transitions. [2022-02-15 13:14:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:14:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:56,673 INFO L225 Difference]: With dead ends: 26023 [2022-02-15 13:14:56,673 INFO L226 Difference]: Without dead ends: 26005 [2022-02-15 13:14:56,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:14:56,674 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 208 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:56,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1257 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2022-02-15 13:14:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 25282. [2022-02-15 13:14:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25282 states, 25281 states have (on average 3.189628574819034) internal successors, (80637), 25281 states have internal predecessors, (80637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 80637 transitions. [2022-02-15 13:14:57,333 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 80637 transitions. Word has length 25 [2022-02-15 13:14:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:14:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 25282 states and 80637 transitions. [2022-02-15 13:14:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 80637 transitions. [2022-02-15 13:14:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:14:57,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:14:57,381 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:14:57,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-02-15 13:14:57,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:57,582 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:14:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:14:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1922038361, now seen corresponding path program 449 times [2022-02-15 13:14:57,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:14:57,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339605014] [2022-02-15 13:14:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:14:57,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:14:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:14:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:57,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:14:57,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339605014] [2022-02-15 13:14:57,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339605014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:14:57,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215290859] [2022-02-15 13:14:57,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:14:57,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:14:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:14:57,756 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:14:57,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-02-15 13:14:57,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:14:57,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:14:57,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:14:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:14:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:58,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:14:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:14:58,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215290859] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:14:58,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:14:58,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 34 [2022-02-15 13:14:58,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862353396] [2022-02-15 13:14:58,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:14:58,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:14:58,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:14:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:14:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:14:58,532 INFO L87 Difference]: Start difference. First operand 25282 states and 80637 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:14:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:14:59,302 INFO L93 Difference]: Finished difference Result 25873 states and 81826 transitions. [2022-02-15 13:14:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:14:59,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:14:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:14:59,389 INFO L225 Difference]: With dead ends: 25873 [2022-02-15 13:14:59,389 INFO L226 Difference]: Without dead ends: 25851 [2022-02-15 13:14:59,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:14:59,389 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 207 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:14:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1049 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:14:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25851 states. [2022-02-15 13:14:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25851 to 25224. [2022-02-15 13:14:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25224 states, 25223 states have (on average 3.1875669032232485) internal successors, (80400), 25223 states have internal predecessors, (80400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25224 states to 25224 states and 80400 transitions. [2022-02-15 13:15:00,041 INFO L78 Accepts]: Start accepts. Automaton has 25224 states and 80400 transitions. Word has length 25 [2022-02-15 13:15:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:00,042 INFO L470 AbstractCegarLoop]: Abstraction has 25224 states and 80400 transitions. [2022-02-15 13:15:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 25224 states and 80400 transitions. [2022-02-15 13:15:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:00,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:00,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:00,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:00,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:00,291 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:00,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1955637589, now seen corresponding path program 450 times [2022-02-15 13:15:00,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:00,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153997928] [2022-02-15 13:15:00,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:00,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:00,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:00,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153997928] [2022-02-15 13:15:00,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153997928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:00,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256956880] [2022-02-15 13:15:00,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:15:00,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:00,480 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:00,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-02-15 13:15:00,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:15:00,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:00,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:01,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256956880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:01,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:01,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-02-15 13:15:01,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279289742] [2022-02-15 13:15:01,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:01,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:15:01,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:15:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:15:01,157 INFO L87 Difference]: Start difference. First operand 25224 states and 80400 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 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) [2022-02-15 13:15:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:02,004 INFO L93 Difference]: Finished difference Result 25707 states and 81351 transitions. [2022-02-15 13:15:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:15:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 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 [2022-02-15 13:15:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:02,090 INFO L225 Difference]: With dead ends: 25707 [2022-02-15 13:15:02,090 INFO L226 Difference]: Without dead ends: 25681 [2022-02-15 13:15:02,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:02,091 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 190 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:02,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1031 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2022-02-15 13:15:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 25191. [2022-02-15 13:15:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2022-02-15 13:15:02,771 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2022-02-15 13:15:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:02,771 INFO L470 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2022-02-15 13:15:02,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 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) [2022-02-15 13:15:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2022-02-15 13:15:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:02,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:02,819 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:02,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Ended with exit code 0 [2022-02-15 13:15:03,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-02-15 13:15:03,020 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1297753639, now seen corresponding path program 451 times [2022-02-15 13:15:03,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:03,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910141760] [2022-02-15 13:15:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:03,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:03,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:03,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910141760] [2022-02-15 13:15:03,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910141760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:03,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585095780] [2022-02-15 13:15:03,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:15:03,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:03,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:03,203 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:03,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-02-15 13:15:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:03,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:03,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585095780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:03,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:03,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-02-15 13:15:03,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875467727] [2022-02-15 13:15:03,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:03,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:15:03,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:15:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:15:03,887 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:04,667 INFO L93 Difference]: Finished difference Result 25528 states and 80917 transitions. [2022-02-15 13:15:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:15:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:04,734 INFO L225 Difference]: With dead ends: 25528 [2022-02-15 13:15:04,734 INFO L226 Difference]: Without dead ends: 25521 [2022-02-15 13:15:04,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:15:04,734 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 177 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:04,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 923 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:15:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2022-02-15 13:15:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25191. [2022-02-15 13:15:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2022-02-15 13:15:05,294 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2022-02-15 13:15:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2022-02-15 13:15:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2022-02-15 13:15:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:05,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:05,333 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:05,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Ended with exit code 0 [2022-02-15 13:15:05,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-02-15 13:15:05,533 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash -42206587, now seen corresponding path program 452 times [2022-02-15 13:15:05,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:05,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831030957] [2022-02-15 13:15:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:05,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:05,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:05,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831030957] [2022-02-15 13:15:05,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831030957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:05,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005663461] [2022-02-15 13:15:05,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:15:05,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:05,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:05,704 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:05,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-02-15 13:15:05,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:15:05,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:15:06,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:06,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005663461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:06,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:06,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-02-15 13:15:06,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024854203] [2022-02-15 13:15:06,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:06,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:15:06,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:15:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:15:06,486 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:06,964 INFO L93 Difference]: Finished difference Result 25433 states and 80707 transitions. [2022-02-15 13:15:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:15:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:07,029 INFO L225 Difference]: With dead ends: 25433 [2022-02-15 13:15:07,029 INFO L226 Difference]: Without dead ends: 25420 [2022-02-15 13:15:07,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:15:07,030 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 264 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:07,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 595 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:15:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2022-02-15 13:15:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25149. [2022-02-15 13:15:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25149 states, 25148 states have (on average 3.185819945920153) internal successors, (80117), 25148 states have internal predecessors, (80117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 80117 transitions. [2022-02-15 13:15:07,592 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 80117 transitions. Word has length 25 [2022-02-15 13:15:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:07,592 INFO L470 AbstractCegarLoop]: Abstraction has 25149 states and 80117 transitions. [2022-02-15 13:15:07,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 80117 transitions. [2022-02-15 13:15:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:07,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:07,631 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:07,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-02-15 13:15:07,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-02-15 13:15:07,832 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:07,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:07,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1361899285, now seen corresponding path program 453 times [2022-02-15 13:15:07,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:07,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680853374] [2022-02-15 13:15:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:07,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:07,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:07,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680853374] [2022-02-15 13:15:07,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680853374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:07,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713823905] [2022-02-15 13:15:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:15:07,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:07,998 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:07,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-02-15 13:15:08,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:15:08,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:08,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:08,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713823905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:08,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:08,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 36 [2022-02-15 13:15:08,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851313725] [2022-02-15 13:15:08,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:08,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:15:08,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:15:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:15:08,700 INFO L87 Difference]: Start difference. First operand 25149 states and 80117 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:09,496 INFO L93 Difference]: Finished difference Result 26300 states and 83236 transitions. [2022-02-15 13:15:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:15:09,496 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:09,563 INFO L225 Difference]: With dead ends: 26300 [2022-02-15 13:15:09,563 INFO L226 Difference]: Without dead ends: 26283 [2022-02-15 13:15:09,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:15:09,564 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 247 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:09,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 1286 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2022-02-15 13:15:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 25645. [2022-02-15 13:15:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.1899469661519264) internal successors, (81803), 25644 states have internal predecessors, (81803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81803 transitions. [2022-02-15 13:15:10,222 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81803 transitions. Word has length 25 [2022-02-15 13:15:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:10,222 INFO L470 AbstractCegarLoop]: Abstraction has 25645 states and 81803 transitions. [2022-02-15 13:15:10,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81803 transitions. [2022-02-15 13:15:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:10,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:10,269 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:10,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:10,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-02-15 13:15:10,484 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 252803439, now seen corresponding path program 454 times [2022-02-15 13:15:10,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:10,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877637505] [2022-02-15 13:15:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:10,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:10,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:10,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877637505] [2022-02-15 13:15:10,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877637505] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:10,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125132724] [2022-02-15 13:15:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:15:10,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:10,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:10,648 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:10,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-02-15 13:15:10,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:15:10,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:10,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:11,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125132724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:11,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:11,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 35 [2022-02-15 13:15:11,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996115120] [2022-02-15 13:15:11,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:11,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:15:11,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:11,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:15:11,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:15:11,338 INFO L87 Difference]: Start difference. First operand 25645 states and 81803 transitions. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:12,108 INFO L93 Difference]: Finished difference Result 26302 states and 83129 transitions. [2022-02-15 13:15:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:15:12,108 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:12,179 INFO L225 Difference]: With dead ends: 26302 [2022-02-15 13:15:12,179 INFO L226 Difference]: Without dead ends: 26284 [2022-02-15 13:15:12,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:12,180 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 206 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:12,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1285 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:15:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26284 states. [2022-02-15 13:15:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26284 to 25519. [2022-02-15 13:15:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25519 states, 25518 states have (on average 3.186966063171095) internal successors, (81325), 25518 states have internal predecessors, (81325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 81325 transitions. [2022-02-15 13:15:12,749 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 81325 transitions. Word has length 25 [2022-02-15 13:15:12,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:12,749 INFO L470 AbstractCegarLoop]: Abstraction has 25519 states and 81325 transitions. [2022-02-15 13:15:12,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:12,749 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 81325 transitions. [2022-02-15 13:15:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:12,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:12,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:12,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-02-15 13:15:12,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2022-02-15 13:15:12,994 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:12,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1826490389, now seen corresponding path program 455 times [2022-02-15 13:15:12,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:12,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50853950] [2022-02-15 13:15:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:12,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:13,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:13,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50853950] [2022-02-15 13:15:13,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50853950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:13,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959269218] [2022-02-15 13:15:13,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:15:13,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:13,162 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:13,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-02-15 13:15:13,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:15:13,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:13,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:13,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:13,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:13,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959269218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:13,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:13,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 34 [2022-02-15 13:15:13,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747720024] [2022-02-15 13:15:13,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:13,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:15:13,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:15:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:15:13,901 INFO L87 Difference]: Start difference. First operand 25519 states and 81325 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 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) [2022-02-15 13:15:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:14,696 INFO L93 Difference]: Finished difference Result 26169 states and 82620 transitions. [2022-02-15 13:15:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:15:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 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 [2022-02-15 13:15:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:14,763 INFO L225 Difference]: With dead ends: 26169 [2022-02-15 13:15:14,763 INFO L226 Difference]: Without dead ends: 26147 [2022-02-15 13:15:14,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:14,763 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 190 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:14,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1173 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:15:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2022-02-15 13:15:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 25469. [2022-02-15 13:15:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25468 states have (on average 3.1853698759227265) internal successors, (81125), 25468 states have internal predecessors, (81125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 81125 transitions. [2022-02-15 13:15:15,321 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 81125 transitions. Word has length 25 [2022-02-15 13:15:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:15,321 INFO L470 AbstractCegarLoop]: Abstraction has 25469 states and 81125 transitions. [2022-02-15 13:15:15,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 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) [2022-02-15 13:15:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 81125 transitions. [2022-02-15 13:15:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:15,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:15,360 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:15,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Ended with exit code 0 [2022-02-15 13:15:15,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2022-02-15 13:15:15,560 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1860089617, now seen corresponding path program 456 times [2022-02-15 13:15:15,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:15,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637542470] [2022-02-15 13:15:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:15,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:15,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:15,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637542470] [2022-02-15 13:15:15,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637542470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:15,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159628024] [2022-02-15 13:15:15,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:15:15,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:15,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:15,737 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:15,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-02-15 13:15:15,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:15:15,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:15,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:16,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:16,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159628024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:16,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:16,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 33 [2022-02-15 13:15:16,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934280321] [2022-02-15 13:15:16,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:16,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:15:16,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:15:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:15:16,395 INFO L87 Difference]: Start difference. First operand 25469 states and 81125 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:17,294 INFO L93 Difference]: Finished difference Result 26109 states and 82367 transitions. [2022-02-15 13:15:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:15:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:17,360 INFO L225 Difference]: With dead ends: 26109 [2022-02-15 13:15:17,360 INFO L226 Difference]: Without dead ends: 26083 [2022-02-15 13:15:17,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:17,360 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 174 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:17,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1212 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2022-02-15 13:15:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25423. [2022-02-15 13:15:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25423 states, 25422 states have (on average 3.1845645503894264) internal successors, (80958), 25422 states have internal predecessors, (80958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25423 states to 25423 states and 80958 transitions. [2022-02-15 13:15:17,985 INFO L78 Accepts]: Start accepts. Automaton has 25423 states and 80958 transitions. Word has length 25 [2022-02-15 13:15:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:17,985 INFO L470 AbstractCegarLoop]: Abstraction has 25423 states and 80958 transitions. [2022-02-15 13:15:17,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 25423 states and 80958 transitions. [2022-02-15 13:15:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:18,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:18,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:18,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Ended with exit code 0 [2022-02-15 13:15:18,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2022-02-15 13:15:18,224 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1393301611, now seen corresponding path program 457 times [2022-02-15 13:15:18,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:18,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624724702] [2022-02-15 13:15:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:18,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:18,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:18,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624724702] [2022-02-15 13:15:18,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624724702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:18,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101056695] [2022-02-15 13:15:18,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:15:18,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:18,406 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-02-15 13:15:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:18,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:18,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:19,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101056695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:19,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:19,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-02-15 13:15:19,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573256513] [2022-02-15 13:15:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:19,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:15:19,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:15:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:15:19,067 INFO L87 Difference]: Start difference. First operand 25423 states and 80958 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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) [2022-02-15 13:15:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:19,965 INFO L93 Difference]: Finished difference Result 25930 states and 81933 transitions. [2022-02-15 13:15:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:15:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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 25 [2022-02-15 13:15:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:20,036 INFO L225 Difference]: With dead ends: 25930 [2022-02-15 13:15:20,036 INFO L226 Difference]: Without dead ends: 25900 [2022-02-15 13:15:20,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:20,037 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 190 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:20,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1051 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2022-02-15 13:15:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25388. [2022-02-15 13:15:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2022-02-15 13:15:20,628 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2022-02-15 13:15:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:20,628 INFO L470 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2022-02-15 13:15:20,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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) [2022-02-15 13:15:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2022-02-15 13:15:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:20,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:20,669 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:20,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:20,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:20,869 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -830785425, now seen corresponding path program 458 times [2022-02-15 13:15:20,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:20,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583858369] [2022-02-15 13:15:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:20,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:21,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:21,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583858369] [2022-02-15 13:15:21,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583858369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:21,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048976219] [2022-02-15 13:15:21,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:15:21,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:21,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:21,054 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:21,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-02-15 13:15:21,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:15:21,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:21,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:21,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:21,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048976219] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:21,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:21,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2022-02-15 13:15:21,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865157466] [2022-02-15 13:15:21,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:21,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:15:21,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:21,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:15:21,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:15:21,755 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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) [2022-02-15 13:15:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:22,657 INFO L93 Difference]: Finished difference Result 25727 states and 81464 transitions. [2022-02-15 13:15:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:15:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:22,748 INFO L225 Difference]: With dead ends: 25727 [2022-02-15 13:15:22,748 INFO L226 Difference]: Without dead ends: 25720 [2022-02-15 13:15:22,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:15:22,749 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 166 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:22,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1082 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2022-02-15 13:15:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 25388. [2022-02-15 13:15:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2022-02-15 13:15:23,386 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2022-02-15 13:15:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:23,386 INFO L470 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2022-02-15 13:15:23,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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) [2022-02-15 13:15:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2022-02-15 13:15:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:23,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:23,434 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:23,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-02-15 13:15:23,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:23,635 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1743284289, now seen corresponding path program 459 times [2022-02-15 13:15:23,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:23,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275236790] [2022-02-15 13:15:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:23,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:23,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:23,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275236790] [2022-02-15 13:15:23,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275236790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:23,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026570191] [2022-02-15 13:15:23,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:15:23,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:23,806 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:23,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-02-15 13:15:23,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:15:23,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:23,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:15:24,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:24,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026570191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:24,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:24,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-02-15 13:15:24,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634982567] [2022-02-15 13:15:24,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:24,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:15:24,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:24,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:15:24,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:15:24,549 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:25,100 INFO L93 Difference]: Finished difference Result 25601 states and 81204 transitions. [2022-02-15 13:15:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:15:25,101 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:25,190 INFO L225 Difference]: With dead ends: 25601 [2022-02-15 13:15:25,190 INFO L226 Difference]: Without dead ends: 25588 [2022-02-15 13:15:25,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:15:25,190 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 264 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:25,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 689 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:15:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25588 states. [2022-02-15 13:15:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25588 to 25330. [2022-02-15 13:15:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25330 states, 25329 states have (on average 3.1820837774882547) internal successors, (80599), 25329 states have internal predecessors, (80599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25330 states to 25330 states and 80599 transitions. [2022-02-15 13:15:25,913 INFO L78 Accepts]: Start accepts. Automaton has 25330 states and 80599 transitions. Word has length 25 [2022-02-15 13:15:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 25330 states and 80599 transitions. [2022-02-15 13:15:25,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 25330 states and 80599 transitions. [2022-02-15 13:15:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:25,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:25,962 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:25,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Ended with exit code 0 [2022-02-15 13:15:26,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:26,162 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:26,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1600087847, now seen corresponding path program 460 times [2022-02-15 13:15:26,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:26,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332553155] [2022-02-15 13:15:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:26,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:26,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:26,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332553155] [2022-02-15 13:15:26,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332553155] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:26,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056705703] [2022-02-15 13:15:26,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:15:26,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:26,330 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:26,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-02-15 13:15:26,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:15:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:26,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:26,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:27,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056705703] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:27,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:27,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 36 [2022-02-15 13:15:27,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113371425] [2022-02-15 13:15:27,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:15:27,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:15:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:15:27,025 INFO L87 Difference]: Start difference. First operand 25330 states and 80599 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:27,765 INFO L93 Difference]: Finished difference Result 26240 states and 82962 transitions. [2022-02-15 13:15:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:15:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:27,853 INFO L225 Difference]: With dead ends: 26240 [2022-02-15 13:15:27,853 INFO L226 Difference]: Without dead ends: 26223 [2022-02-15 13:15:27,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:15:27,854 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 256 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:27,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1108 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:15:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26223 states. [2022-02-15 13:15:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26223 to 25777. [2022-02-15 13:15:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 25776 states have (on average 3.1840083798882683) internal successors, (82071), 25776 states have internal predecessors, (82071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 82071 transitions. [2022-02-15 13:15:28,511 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 82071 transitions. Word has length 25 [2022-02-15 13:15:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:28,511 INFO L470 AbstractCegarLoop]: Abstraction has 25777 states and 82071 transitions. [2022-02-15 13:15:28,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 82071 transitions. [2022-02-15 13:15:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:28,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:28,567 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:28,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-02-15 13:15:28,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:28,767 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1080176725, now seen corresponding path program 461 times [2022-02-15 13:15:28,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:28,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374326571] [2022-02-15 13:15:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:28,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:28,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:28,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374326571] [2022-02-15 13:15:28,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374326571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:28,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471086727] [2022-02-15 13:15:28,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:15:28,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:28,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:28,940 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-02-15 13:15:28,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:15:28,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:29,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:29,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471086727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:29,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:29,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 35 [2022-02-15 13:15:29,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824505244] [2022-02-15 13:15:29,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:15:29,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:15:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:15:29,699 INFO L87 Difference]: Start difference. First operand 25777 states and 82071 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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) [2022-02-15 13:15:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:30,525 INFO L93 Difference]: Finished difference Result 26238 states and 82828 transitions. [2022-02-15 13:15:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:15:30,525 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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 [2022-02-15 13:15:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:30,612 INFO L225 Difference]: With dead ends: 26238 [2022-02-15 13:15:30,613 INFO L226 Difference]: Without dead ends: 26220 [2022-02-15 13:15:30,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:30,613 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 218 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:30,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1378 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1738 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2022-02-15 13:15:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25645. [2022-02-15 13:15:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.181913897987833) internal successors, (81597), 25644 states have internal predecessors, (81597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81597 transitions. [2022-02-15 13:15:31,273 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81597 transitions. Word has length 25 [2022-02-15 13:15:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:31,273 INFO L470 AbstractCegarLoop]: Abstraction has 25645 states and 81597 transitions. [2022-02-15 13:15:31,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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) [2022-02-15 13:15:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81597 transitions. [2022-02-15 13:15:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:31,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:31,328 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:31,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:31,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-02-15 13:15:31,528 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1135496743, now seen corresponding path program 462 times [2022-02-15 13:15:31,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:31,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636991155] [2022-02-15 13:15:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:31,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:31,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:31,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636991155] [2022-02-15 13:15:31,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636991155] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:31,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119146604] [2022-02-15 13:15:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:15:31,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:31,699 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:31,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-02-15 13:15:31,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:15:31,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:31,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:31,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:32,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119146604] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:32,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:32,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 34 [2022-02-15 13:15:32,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501278492] [2022-02-15 13:15:32,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:32,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:15:32,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:15:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:15:32,385 INFO L87 Difference]: Start difference. First operand 25645 states and 81597 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:33,296 INFO L93 Difference]: Finished difference Result 26128 states and 82385 transitions. [2022-02-15 13:15:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:15:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:33,384 INFO L225 Difference]: With dead ends: 26128 [2022-02-15 13:15:33,384 INFO L226 Difference]: Without dead ends: 26106 [2022-02-15 13:15:33,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:33,385 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 171 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:33,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1412 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26106 states. [2022-02-15 13:15:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26106 to 25607. [2022-02-15 13:15:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25607 states, 25606 states have (on average 3.180465515894712) internal successors, (81439), 25606 states have internal predecessors, (81439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25607 states to 25607 states and 81439 transitions. [2022-02-15 13:15:34,129 INFO L78 Accepts]: Start accepts. Automaton has 25607 states and 81439 transitions. Word has length 25 [2022-02-15 13:15:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:34,129 INFO L470 AbstractCegarLoop]: Abstraction has 25607 states and 81439 transitions. [2022-02-15 13:15:34,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 25607 states and 81439 transitions. [2022-02-15 13:15:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:34,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:34,183 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:34,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:34,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:34,384 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1101897515, now seen corresponding path program 463 times [2022-02-15 13:15:34,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:34,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306356733] [2022-02-15 13:15:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:34,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:34,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:34,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306356733] [2022-02-15 13:15:34,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306356733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:34,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945494348] [2022-02-15 13:15:34,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:15:34,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:34,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:34,556 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:34,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-02-15 13:15:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:34,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:35,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945494348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:35,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:35,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2022-02-15 13:15:35,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279485807] [2022-02-15 13:15:35,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:35,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:15:35,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:15:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:15:35,215 INFO L87 Difference]: Start difference. First operand 25607 states and 81439 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-02-15 13:15:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:36,090 INFO L93 Difference]: Finished difference Result 26123 states and 82279 transitions. [2022-02-15 13:15:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:15:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 25 [2022-02-15 13:15:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:36,157 INFO L225 Difference]: With dead ends: 26123 [2022-02-15 13:15:36,157 INFO L226 Difference]: Without dead ends: 26097 [2022-02-15 13:15:36,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:36,158 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 212 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:36,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1188 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26097 states. [2022-02-15 13:15:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26097 to 25568. [2022-02-15 13:15:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25568 states, 25567 states have (on average 3.179645636953886) internal successors, (81294), 25567 states have internal predecessors, (81294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 81294 transitions. [2022-02-15 13:15:36,732 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 81294 transitions. Word has length 25 [2022-02-15 13:15:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:36,732 INFO L470 AbstractCegarLoop]: Abstraction has 25568 states and 81294 transitions. [2022-02-15 13:15:36,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-02-15 13:15:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 81294 transitions. [2022-02-15 13:15:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:36,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:36,775 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:36,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Ended with exit code 0 [2022-02-15 13:15:36,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2022-02-15 13:15:36,976 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:36,976 INFO L85 PathProgramCache]: Analyzing trace with hash 60321447, now seen corresponding path program 464 times [2022-02-15 13:15:36,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:36,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103896692] [2022-02-15 13:15:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:36,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:37,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:37,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103896692] [2022-02-15 13:15:37,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103896692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:37,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673447653] [2022-02-15 13:15:37,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:15:37,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:37,223 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:37,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-02-15 13:15:37,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:15:37,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:37,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:37,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:37,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673447653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:37,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:37,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 32 [2022-02-15 13:15:37,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380756137] [2022-02-15 13:15:37,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:37,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:15:37,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:15:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:15:37,845 INFO L87 Difference]: Start difference. First operand 25568 states and 81294 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:15:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:38,727 INFO L93 Difference]: Finished difference Result 26123 states and 82191 transitions. [2022-02-15 13:15:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:15:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:38,792 INFO L225 Difference]: With dead ends: 26123 [2022-02-15 13:15:38,792 INFO L226 Difference]: Without dead ends: 26093 [2022-02-15 13:15:38,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:38,792 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 229 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:38,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1170 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1843 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26093 states. [2022-02-15 13:15:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26093 to 25530. [2022-02-15 13:15:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25530 states, 25529 states have (on average 3.179286301852795) internal successors, (81164), 25529 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25530 states to 25530 states and 81164 transitions. [2022-02-15 13:15:39,313 INFO L78 Accepts]: Start accepts. Automaton has 25530 states and 81164 transitions. Word has length 25 [2022-02-15 13:15:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:39,313 INFO L470 AbstractCegarLoop]: Abstraction has 25530 states and 81164 transitions. [2022-02-15 13:15:39,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:15:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 25530 states and 81164 transitions. [2022-02-15 13:15:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:39,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:39,350 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:39,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Ended with exit code 0 [2022-02-15 13:15:39,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-02-15 13:15:39,551 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2131201707, now seen corresponding path program 465 times [2022-02-15 13:15:39,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:39,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866089770] [2022-02-15 13:15:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:39,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:39,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:39,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866089770] [2022-02-15 13:15:39,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866089770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:39,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951708268] [2022-02-15 13:15:39,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:15:39,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:39,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:39,733 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:39,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-02-15 13:15:39,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:15:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:39,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:40,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951708268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:40,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:40,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2022-02-15 13:15:40,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394493159] [2022-02-15 13:15:40,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:40,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:15:40,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:15:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:15:40,336 INFO L87 Difference]: Start difference. First operand 25530 states and 81164 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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) [2022-02-15 13:15:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:41,272 INFO L93 Difference]: Finished difference Result 25971 states and 81876 transitions. [2022-02-15 13:15:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:15:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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 25 [2022-02-15 13:15:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:41,345 INFO L225 Difference]: With dead ends: 25971 [2022-02-15 13:15:41,345 INFO L226 Difference]: Without dead ends: 25937 [2022-02-15 13:15:41,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:41,345 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 174 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:41,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1069 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25937 states. [2022-02-15 13:15:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25937 to 25500. [2022-02-15 13:15:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 25499 states have (on average 3.179379583513079) internal successors, (81071), 25499 states have internal predecessors, (81071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 81071 transitions. [2022-02-15 13:15:42,095 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 81071 transitions. Word has length 25 [2022-02-15 13:15:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:42,095 INFO L470 AbstractCegarLoop]: Abstraction has 25500 states and 81071 transitions. [2022-02-15 13:15:42,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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) [2022-02-15 13:15:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 81071 transitions. [2022-02-15 13:15:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:42,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:42,146 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:42,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:42,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:42,346 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1903980327, now seen corresponding path program 466 times [2022-02-15 13:15:42,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:42,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447740420] [2022-02-15 13:15:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:42,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:42,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:42,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447740420] [2022-02-15 13:15:42,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447740420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:42,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26055304] [2022-02-15 13:15:42,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:15:42,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:42,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:42,540 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:42,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-02-15 13:15:42,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:15:42,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:42,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:43,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26055304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:43,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:43,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 30 [2022-02-15 13:15:43,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061311750] [2022-02-15 13:15:43,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:43,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:15:43,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:15:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:15:43,138 INFO L87 Difference]: Start difference. First operand 25500 states and 81071 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:44,152 INFO L93 Difference]: Finished difference Result 25807 states and 81556 transitions. [2022-02-15 13:15:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:15:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:44,241 INFO L225 Difference]: With dead ends: 25807 [2022-02-15 13:15:44,242 INFO L226 Difference]: Without dead ends: 25800 [2022-02-15 13:15:44,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:15:44,242 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 145 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:44,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1207 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:15:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25800 states. [2022-02-15 13:15:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25800 to 25502. [2022-02-15 13:15:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25501 states have (on average 3.1792478726324456) internal successors, (81074), 25501 states have internal predecessors, (81074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 81074 transitions. [2022-02-15 13:15:45,058 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 81074 transitions. Word has length 25 [2022-02-15 13:15:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:45,058 INFO L470 AbstractCegarLoop]: Abstraction has 25502 states and 81074 transitions. [2022-02-15 13:15:45,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 81074 transitions. [2022-02-15 13:15:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:45,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:45,105 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:45,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:45,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2022-02-15 13:15:45,306 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1258926597, now seen corresponding path program 467 times [2022-02-15 13:15:45,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:45,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103555942] [2022-02-15 13:15:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:45,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:45,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:45,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103555942] [2022-02-15 13:15:45,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103555942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:45,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141514939] [2022-02-15 13:15:45,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:15:45,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:45,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:45,474 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:45,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-02-15 13:15:45,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:15:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:45,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:15:45,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:46,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141514939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:46,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:46,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-02-15 13:15:46,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212592021] [2022-02-15 13:15:46,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:46,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:15:46,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:15:46,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:15:46,207 INFO L87 Difference]: Start difference. First operand 25502 states and 81074 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:46,747 INFO L93 Difference]: Finished difference Result 25654 states and 81322 transitions. [2022-02-15 13:15:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:15:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:46,837 INFO L225 Difference]: With dead ends: 25654 [2022-02-15 13:15:46,837 INFO L226 Difference]: Without dead ends: 25641 [2022-02-15 13:15:46,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:15:46,838 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 145 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:46,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 654 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:15:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25641 states. [2022-02-15 13:15:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25641 to 25457. [2022-02-15 13:15:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25457 states, 25456 states have (on average 3.179525455688246) internal successors, (80938), 25456 states have internal predecessors, (80938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 80938 transitions. [2022-02-15 13:15:47,502 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 80938 transitions. Word has length 25 [2022-02-15 13:15:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:47,502 INFO L470 AbstractCegarLoop]: Abstraction has 25457 states and 80938 transitions. [2022-02-15 13:15:47,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 80938 transitions. [2022-02-15 13:15:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:47,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:47,552 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:47,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Forceful destruction successful, exit code 0 [2022-02-15 13:15:47,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:47,752 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1067591573, now seen corresponding path program 468 times [2022-02-15 13:15:47,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:47,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367891349] [2022-02-15 13:15:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:47,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:47,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:47,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367891349] [2022-02-15 13:15:47,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367891349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:47,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453741141] [2022-02-15 13:15:47,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:15:47,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:47,927 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:47,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-02-15 13:15:47,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:15:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:48,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:48,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453741141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:48,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:48,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-02-15 13:15:48,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284009147] [2022-02-15 13:15:48,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:48,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:15:48,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:15:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:15:48,642 INFO L87 Difference]: Start difference. First operand 25457 states and 80938 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:49,588 INFO L93 Difference]: Finished difference Result 26445 states and 83499 transitions. [2022-02-15 13:15:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:15:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:49,673 INFO L225 Difference]: With dead ends: 26445 [2022-02-15 13:15:49,673 INFO L226 Difference]: Without dead ends: 26428 [2022-02-15 13:15:49,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:15:49,673 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 210 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:49,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1340 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:15:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2022-02-15 13:15:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26047. [2022-02-15 13:15:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.1769177608845887) internal successors, (82746), 26046 states have internal predecessors, (82746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 82746 transitions. [2022-02-15 13:15:50,320 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 82746 transitions. Word has length 25 [2022-02-15 13:15:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:50,320 INFO L470 AbstractCegarLoop]: Abstraction has 26047 states and 82746 transitions. [2022-02-15 13:15:50,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 82746 transitions. [2022-02-15 13:15:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:50,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:50,376 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:50,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-02-15 13:15:50,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:50,576 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:50,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash 547111151, now seen corresponding path program 469 times [2022-02-15 13:15:50,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:50,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331705361] [2022-02-15 13:15:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:50,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:50,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:50,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331705361] [2022-02-15 13:15:50,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331705361] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:50,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994188388] [2022-02-15 13:15:50,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:15:50,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:50,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:50,743 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:50,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-02-15 13:15:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:50,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:50,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:51,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994188388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:51,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:51,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-02-15 13:15:51,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119175056] [2022-02-15 13:15:51,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:51,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:15:51,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:15:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:15:51,423 INFO L87 Difference]: Start difference. First operand 26047 states and 82746 transitions. Second operand has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-02-15 13:15:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:52,342 INFO L93 Difference]: Finished difference Result 26443 states and 83380 transitions. [2022-02-15 13:15:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:15:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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 25 [2022-02-15 13:15:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:52,430 INFO L225 Difference]: With dead ends: 26443 [2022-02-15 13:15:52,430 INFO L226 Difference]: Without dead ends: 26427 [2022-02-15 13:15:52,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:52,431 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 151 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:52,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1674 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:15:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26427 states. [2022-02-15 13:15:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26427 to 26006. [2022-02-15 13:15:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26006 states, 26005 states have (on average 3.173658911747741) internal successors, (82531), 26005 states have internal predecessors, (82531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26006 states to 26006 states and 82531 transitions. [2022-02-15 13:15:53,202 INFO L78 Accepts]: Start accepts. Automaton has 26006 states and 82531 transitions. Word has length 25 [2022-02-15 13:15:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:53,202 INFO L470 AbstractCegarLoop]: Abstraction has 26006 states and 82531 transitions. [2022-02-15 13:15:53,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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) [2022-02-15 13:15:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26006 states and 82531 transitions. [2022-02-15 13:15:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:53,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:53,257 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:53,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Ended with exit code 0 [2022-02-15 13:15:53,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:53,457 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1532182677, now seen corresponding path program 470 times [2022-02-15 13:15:53,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:53,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270799284] [2022-02-15 13:15:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:53,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:53,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:53,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270799284] [2022-02-15 13:15:53,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270799284] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:53,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525692076] [2022-02-15 13:15:53,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:15:53,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:53,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:53,634 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:53,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-02-15 13:15:53,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:15:53,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:53,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:53,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:54,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525692076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:54,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:54,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-02-15 13:15:54,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412045735] [2022-02-15 13:15:54,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:54,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:15:54,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:54,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:15:54,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:15:54,306 INFO L87 Difference]: Start difference. First operand 26006 states and 82531 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 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) [2022-02-15 13:15:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:55,176 INFO L93 Difference]: Finished difference Result 26428 states and 83208 transitions. [2022-02-15 13:15:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:15:55,177 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:15:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:55,269 INFO L225 Difference]: With dead ends: 26428 [2022-02-15 13:15:55,269 INFO L226 Difference]: Without dead ends: 26410 [2022-02-15 13:15:55,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:55,269 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 200 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:55,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1359 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26410 states. [2022-02-15 13:15:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26410 to 25949. [2022-02-15 13:15:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25949 states, 25948 states have (on average 3.1697240635116386) internal successors, (82248), 25948 states have internal predecessors, (82248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25949 states to 25949 states and 82248 transitions. [2022-02-15 13:15:55,948 INFO L78 Accepts]: Start accepts. Automaton has 25949 states and 82248 transitions. Word has length 25 [2022-02-15 13:15:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:55,948 INFO L470 AbstractCegarLoop]: Abstraction has 25949 states and 82248 transitions. [2022-02-15 13:15:55,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 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) [2022-02-15 13:15:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25949 states and 82248 transitions. [2022-02-15 13:15:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:56,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:56,002 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:56,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Ended with exit code 0 [2022-02-15 13:15:56,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:56,202 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1565781905, now seen corresponding path program 471 times [2022-02-15 13:15:56,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:56,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059697027] [2022-02-15 13:15:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:56,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:56,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:56,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059697027] [2022-02-15 13:15:56,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059697027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:56,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218862877] [2022-02-15 13:15:56,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:15:56,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:56,385 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:56,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-02-15 13:15:56,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:15:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:56,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:56,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:56,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:57,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218862877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:57,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:57,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-02-15 13:15:57,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956296109] [2022-02-15 13:15:57,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:57,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:15:57,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:15:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:15:57,055 INFO L87 Difference]: Start difference. First operand 25949 states and 82248 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-02-15 13:15:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:15:58,006 INFO L93 Difference]: Finished difference Result 26398 states and 82966 transitions. [2022-02-15 13:15:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:15:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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 25 [2022-02-15 13:15:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:15:58,094 INFO L225 Difference]: With dead ends: 26398 [2022-02-15 13:15:58,094 INFO L226 Difference]: Without dead ends: 26378 [2022-02-15 13:15:58,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:15:58,094 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 202 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:15:58,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1231 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:15:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26378 states. [2022-02-15 13:15:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26378 to 25877. [2022-02-15 13:15:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25877 states, 25876 states have (on average 3.166409027670428) internal successors, (81934), 25876 states have internal predecessors, (81934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:15:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25877 states to 25877 states and 81934 transitions. [2022-02-15 13:15:58,772 INFO L78 Accepts]: Start accepts. Automaton has 25877 states and 81934 transitions. Word has length 25 [2022-02-15 13:15:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:15:58,772 INFO L470 AbstractCegarLoop]: Abstraction has 25877 states and 81934 transitions. [2022-02-15 13:15:58,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-02-15 13:15:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 25877 states and 81934 transitions. [2022-02-15 13:15:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:15:58,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:15:58,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:15:58,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Ended with exit code 0 [2022-02-15 13:15:59,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable484 [2022-02-15 13:15:59,027 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:15:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:15:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1687609323, now seen corresponding path program 472 times [2022-02-15 13:15:59,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:15:59,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776595896] [2022-02-15 13:15:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:15:59,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:15:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:15:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:59,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:15:59,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776595896] [2022-02-15 13:15:59,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776595896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:15:59,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137882078] [2022-02-15 13:15:59,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:15:59,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:15:59,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:15:59,211 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:15:59,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-02-15 13:15:59,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:15:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:15:59,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:15:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:15:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:59,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:15:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:15:59,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137882078] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:15:59,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:15:59,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-02-15 13:15:59,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997634789] [2022-02-15 13:15:59,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:15:59,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:15:59,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:15:59,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:15:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:15:59,868 INFO L87 Difference]: Start difference. First operand 25877 states and 81934 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:00,911 INFO L93 Difference]: Finished difference Result 26361 states and 82705 transitions. [2022-02-15 13:16:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:16:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:01,000 INFO L225 Difference]: With dead ends: 26361 [2022-02-15 13:16:01,001 INFO L226 Difference]: Without dead ends: 26339 [2022-02-15 13:16:01,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:16:01,001 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 177 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:01,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1437 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:16:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26339 states. [2022-02-15 13:16:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26339 to 25791. [2022-02-15 13:16:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25791 states, 25790 states have (on average 3.164831329972858) internal successors, (81621), 25790 states have internal predecessors, (81621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25791 states to 25791 states and 81621 transitions. [2022-02-15 13:16:01,764 INFO L78 Accepts]: Start accepts. Automaton has 25791 states and 81621 transitions. Word has length 25 [2022-02-15 13:16:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:01,764 INFO L470 AbstractCegarLoop]: Abstraction has 25791 states and 81621 transitions. [2022-02-15 13:16:01,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 25791 states and 81621 transitions. [2022-02-15 13:16:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:01,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:01,820 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:01,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-02-15 13:16:02,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2022-02-15 13:16:02,020 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash -536477713, now seen corresponding path program 473 times [2022-02-15 13:16:02,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:02,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978876510] [2022-02-15 13:16:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:02,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:02,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:02,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978876510] [2022-02-15 13:16:02,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978876510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:02,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528356349] [2022-02-15 13:16:02,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:16:02,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:02,243 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:02,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-02-15 13:16:02,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:16:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:02,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:02,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:02,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528356349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:02,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:02,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-02-15 13:16:02,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461113762] [2022-02-15 13:16:02,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:02,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:16:02,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:16:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:16:02,886 INFO L87 Difference]: Start difference. First operand 25791 states and 81621 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 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) [2022-02-15 13:16:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:03,951 INFO L93 Difference]: Finished difference Result 26316 states and 82452 transitions. [2022-02-15 13:16:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:16:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 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 [2022-02-15 13:16:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:04,038 INFO L225 Difference]: With dead ends: 26316 [2022-02-15 13:16:04,039 INFO L226 Difference]: Without dead ends: 26292 [2022-02-15 13:16:04,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:16:04,039 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 194 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:04,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1366 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:16:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26292 states. [2022-02-15 13:16:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26292 to 25713. [2022-02-15 13:16:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25713 states, 25712 states have (on average 3.164281269446173) internal successors, (81360), 25712 states have internal predecessors, (81360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25713 states to 25713 states and 81360 transitions. [2022-02-15 13:16:04,697 INFO L78 Accepts]: Start accepts. Automaton has 25713 states and 81360 transitions. Word has length 25 [2022-02-15 13:16:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:04,697 INFO L470 AbstractCegarLoop]: Abstraction has 25713 states and 81360 transitions. [2022-02-15 13:16:04,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 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) [2022-02-15 13:16:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25713 states and 81360 transitions. [2022-02-15 13:16:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:04,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:04,751 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:04,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Ended with exit code 0 [2022-02-15 13:16:04,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-02-15 13:16:04,952 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash -763699093, now seen corresponding path program 474 times [2022-02-15 13:16:04,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:04,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775018831] [2022-02-15 13:16:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:04,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:05,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:05,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775018831] [2022-02-15 13:16:05,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775018831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:05,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223172177] [2022-02-15 13:16:05,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:16:05,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:05,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:05,150 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:05,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-02-15 13:16:05,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:16:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:05,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:05,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223172177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:05,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:05,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2022-02-15 13:16:05,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071980649] [2022-02-15 13:16:05,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:05,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:16:05,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:16:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:16:05,816 INFO L87 Difference]: Start difference. First operand 25713 states and 81360 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2022-02-15 13:16:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:06,896 INFO L93 Difference]: Finished difference Result 26083 states and 81944 transitions. [2022-02-15 13:16:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:16:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:06,983 INFO L225 Difference]: With dead ends: 26083 [2022-02-15 13:16:06,984 INFO L226 Difference]: Without dead ends: 26057 [2022-02-15 13:16:06,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:16:06,984 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 138 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:06,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1260 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:16:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2022-02-15 13:16:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 25637. [2022-02-15 13:16:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 3.1651973786862224) internal successors, (81143), 25636 states have internal predecessors, (81143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 81143 transitions. [2022-02-15 13:16:07,637 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 81143 transitions. Word has length 25 [2022-02-15 13:16:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:07,637 INFO L470 AbstractCegarLoop]: Abstraction has 25637 states and 81143 transitions. [2022-02-15 13:16:07,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2022-02-15 13:16:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 81143 transitions. [2022-02-15 13:16:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:07,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:07,693 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:07,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Ended with exit code 0 [2022-02-15 13:16:07,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-02-15 13:16:07,893 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash 782372719, now seen corresponding path program 475 times [2022-02-15 13:16:07,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:07,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965416952] [2022-02-15 13:16:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:07,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:08,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:08,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965416952] [2022-02-15 13:16:08,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965416952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:08,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107636874] [2022-02-15 13:16:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:16:08,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:08,107 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:08,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-02-15 13:16:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:08,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:08,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:08,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:08,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107636874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:08,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:08,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-02-15 13:16:08,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086903237] [2022-02-15 13:16:08,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:08,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:16:08,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:16:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:16:08,703 INFO L87 Difference]: Start difference. First operand 25637 states and 81143 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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) [2022-02-15 13:16:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:09,760 INFO L93 Difference]: Finished difference Result 25903 states and 81553 transitions. [2022-02-15 13:16:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:16:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:09,848 INFO L225 Difference]: With dead ends: 25903 [2022-02-15 13:16:09,848 INFO L226 Difference]: Without dead ends: 25896 [2022-02-15 13:16:09,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:09,849 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 1973 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:09,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1282 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:16:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25896 states. [2022-02-15 13:16:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25896 to 25651. [2022-02-15 13:16:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25651 states, 25650 states have (on average 3.164288499025341) internal successors, (81164), 25650 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 81164 transitions. [2022-02-15 13:16:10,544 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 81164 transitions. Word has length 25 [2022-02-15 13:16:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:10,544 INFO L470 AbstractCegarLoop]: Abstraction has 25651 states and 81164 transitions. [2022-02-15 13:16:10,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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) [2022-02-15 13:16:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 81164 transitions. [2022-02-15 13:16:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:10,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:10,588 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:10,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Ended with exit code 0 [2022-02-15 13:16:10,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-02-15 13:16:10,788 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:10,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1442714773, now seen corresponding path program 476 times [2022-02-15 13:16:10,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:10,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765956467] [2022-02-15 13:16:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:10,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:10,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:10,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765956467] [2022-02-15 13:16:10,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765956467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:10,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760896679] [2022-02-15 13:16:10,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:16:10,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:10,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:10,955 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:10,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-02-15 13:16:10,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:16:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:10,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:11,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:11,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760896679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:11,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:11,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 36 [2022-02-15 13:16:11,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841876777] [2022-02-15 13:16:11,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:11,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:16:11,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:16:11,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:16:11,670 INFO L87 Difference]: Start difference. First operand 25651 states and 81164 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:12,230 INFO L93 Difference]: Finished difference Result 26339 states and 82876 transitions. [2022-02-15 13:16:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:16:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:12,298 INFO L225 Difference]: With dead ends: 26339 [2022-02-15 13:16:12,298 INFO L226 Difference]: Without dead ends: 26329 [2022-02-15 13:16:12,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:16:12,299 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 191 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:12,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 843 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26329 states. [2022-02-15 13:16:12,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26329 to 25789. [2022-02-15 13:16:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25789 states, 25788 states have (on average 3.167248332557779) internal successors, (81677), 25788 states have internal predecessors, (81677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25789 states to 25789 states and 81677 transitions. [2022-02-15 13:16:12,881 INFO L78 Accepts]: Start accepts. Automaton has 25789 states and 81677 transitions. Word has length 25 [2022-02-15 13:16:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:12,881 INFO L470 AbstractCegarLoop]: Abstraction has 25789 states and 81677 transitions. [2022-02-15 13:16:12,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 25789 states and 81677 transitions. [2022-02-15 13:16:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:12,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:12,998 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:13,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Ended with exit code 0 [2022-02-15 13:16:13,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:13,199 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash 171987951, now seen corresponding path program 477 times [2022-02-15 13:16:13,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:13,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048399618] [2022-02-15 13:16:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:13,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:13,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:13,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048399618] [2022-02-15 13:16:13,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048399618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:13,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323050072] [2022-02-15 13:16:13,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:16:13,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:13,361 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:13,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-02-15 13:16:13,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:16:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:13,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:13,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:14,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323050072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:14,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:14,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 35 [2022-02-15 13:16:14,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159767846] [2022-02-15 13:16:14,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:14,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:16:14,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:16:14,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:16:14,060 INFO L87 Difference]: Start difference. First operand 25789 states and 81677 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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) [2022-02-15 13:16:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:14,575 INFO L93 Difference]: Finished difference Result 26321 states and 82830 transitions. [2022-02-15 13:16:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:16:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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 25 [2022-02-15 13:16:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:14,642 INFO L225 Difference]: With dead ends: 26321 [2022-02-15 13:16:14,642 INFO L226 Difference]: Without dead ends: 26314 [2022-02-15 13:16:14,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:14,642 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 188 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:14,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 775 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:16:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26314 states. [2022-02-15 13:16:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26314 to 25787. [2022-02-15 13:16:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25787 states, 25786 states have (on average 3.1671837431164196) internal successors, (81669), 25786 states have internal predecessors, (81669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25787 states to 25787 states and 81669 transitions. [2022-02-15 13:16:15,224 INFO L78 Accepts]: Start accepts. Automaton has 25787 states and 81669 transitions. Word has length 25 [2022-02-15 13:16:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:15,224 INFO L470 AbstractCegarLoop]: Abstraction has 25787 states and 81669 transitions. [2022-02-15 13:16:15,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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) [2022-02-15 13:16:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 25787 states and 81669 transitions. [2022-02-15 13:16:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:15,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:15,269 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:15,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-02-15 13:16:15,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:15,470 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:15,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:15,470 INFO L85 PathProgramCache]: Analyzing trace with hash -871259967, now seen corresponding path program 478 times [2022-02-15 13:16:15,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:15,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371283880] [2022-02-15 13:16:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:15,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:15,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:15,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371283880] [2022-02-15 13:16:15,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371283880] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:15,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162552837] [2022-02-15 13:16:15,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:16:15,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:15,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:15,643 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:15,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-02-15 13:16:15,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:16:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:15,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:16,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162552837] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:16,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:16,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 16] total 34 [2022-02-15 13:16:16,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406098946] [2022-02-15 13:16:16,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:16:16,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:16:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:16:16,367 INFO L87 Difference]: Start difference. First operand 25787 states and 81669 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:16,907 INFO L93 Difference]: Finished difference Result 26101 states and 82243 transitions. [2022-02-15 13:16:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:16:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:16,967 INFO L225 Difference]: With dead ends: 26101 [2022-02-15 13:16:16,967 INFO L226 Difference]: Without dead ends: 26094 [2022-02-15 13:16:16,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:16,968 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 151 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:16,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 807 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2022-02-15 13:16:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 25786. [2022-02-15 13:16:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25786 states, 25785 states have (on average 3.1671902268760905) internal successors, (81666), 25785 states have internal predecessors, (81666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25786 states to 25786 states and 81666 transitions. [2022-02-15 13:16:17,566 INFO L78 Accepts]: Start accepts. Automaton has 25786 states and 81666 transitions. Word has length 25 [2022-02-15 13:16:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 25786 states and 81666 transitions. [2022-02-15 13:16:17,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 25786 states and 81666 transitions. [2022-02-15 13:16:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:17,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:17,609 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:17,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Forceful destruction successful, exit code 0 [2022-02-15 13:16:17,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2022-02-15 13:16:17,809 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash -186632085, now seen corresponding path program 479 times [2022-02-15 13:16:17,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:17,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465877333] [2022-02-15 13:16:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:17,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:17,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:17,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465877333] [2022-02-15 13:16:17,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465877333] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:17,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793987982] [2022-02-15 13:16:17,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:16:17,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:17,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:17,990 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:17,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-02-15 13:16:18,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:16:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:18,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:18,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:18,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793987982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:18,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:18,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 36 [2022-02-15 13:16:18,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883536993] [2022-02-15 13:16:18,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:18,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:16:18,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:16:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:16:18,711 INFO L87 Difference]: Start difference. First operand 25786 states and 81666 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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) [2022-02-15 13:16:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:19,352 INFO L93 Difference]: Finished difference Result 26623 states and 83970 transitions. [2022-02-15 13:16:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:16:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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 25 [2022-02-15 13:16:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:19,423 INFO L225 Difference]: With dead ends: 26623 [2022-02-15 13:16:19,423 INFO L226 Difference]: Without dead ends: 26613 [2022-02-15 13:16:19,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:16:19,423 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 187 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:19,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1031 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-02-15 13:16:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26000. [2022-02-15 13:16:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.1711219662294705) internal successors, (82446), 25999 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 82446 transitions. [2022-02-15 13:16:20,032 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 82446 transitions. Word has length 25 [2022-02-15 13:16:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:20,032 INFO L470 AbstractCegarLoop]: Abstraction has 26000 states and 82446 transitions. [2022-02-15 13:16:20,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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) [2022-02-15 13:16:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 82446 transitions. [2022-02-15 13:16:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:20,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:20,145 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:20,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Ended with exit code 0 [2022-02-15 13:16:20,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:20,346 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1428070639, now seen corresponding path program 480 times [2022-02-15 13:16:20,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:20,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890069346] [2022-02-15 13:16:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:20,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:20,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890069346] [2022-02-15 13:16:20,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890069346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985347645] [2022-02-15 13:16:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:16:20,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:20,508 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:20,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-02-15 13:16:20,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:16:20,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:20,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:20,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:20,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:21,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985347645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:21,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:21,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 35 [2022-02-15 13:16:21,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394215238] [2022-02-15 13:16:21,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:21,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:16:21,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:16:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:16:21,206 INFO L87 Difference]: Start difference. First operand 26000 states and 82446 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:21,758 INFO L93 Difference]: Finished difference Result 26604 states and 83911 transitions. [2022-02-15 13:16:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:16:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:21,831 INFO L225 Difference]: With dead ends: 26604 [2022-02-15 13:16:21,832 INFO L226 Difference]: Without dead ends: 26597 [2022-02-15 13:16:21,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:21,832 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 164 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:21,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 812 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26597 states. [2022-02-15 13:16:22,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26597 to 25997. [2022-02-15 13:16:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25997 states, 25996 states have (on average 3.1710263117402677) internal successors, (82434), 25996 states have internal predecessors, (82434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25997 states to 25997 states and 82434 transitions. [2022-02-15 13:16:22,418 INFO L78 Accepts]: Start accepts. Automaton has 25997 states and 82434 transitions. Word has length 25 [2022-02-15 13:16:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:22,418 INFO L470 AbstractCegarLoop]: Abstraction has 25997 states and 82434 transitions. [2022-02-15 13:16:22,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25997 states and 82434 transitions. [2022-02-15 13:16:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:22,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:22,464 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:22,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Forceful destruction successful, exit code 0 [2022-02-15 13:16:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:22,664 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 384822721, now seen corresponding path program 481 times [2022-02-15 13:16:22,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:22,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826428379] [2022-02-15 13:16:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:22,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:22,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:22,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826428379] [2022-02-15 13:16:22,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826428379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:22,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540722786] [2022-02-15 13:16:22,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:16:22,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:22,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:22,830 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:22,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-02-15 13:16:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:23,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:23,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540722786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:23,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:23,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 34 [2022-02-15 13:16:23,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478996845] [2022-02-15 13:16:23,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:23,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:16:23,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:16:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:16:23,556 INFO L87 Difference]: Start difference. First operand 25997 states and 82434 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 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) [2022-02-15 13:16:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:24,157 INFO L93 Difference]: Finished difference Result 26449 states and 83488 transitions. [2022-02-15 13:16:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:16:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 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 [2022-02-15 13:16:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:24,225 INFO L225 Difference]: With dead ends: 26449 [2022-02-15 13:16:24,226 INFO L226 Difference]: Without dead ends: 26436 [2022-02-15 13:16:24,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:24,226 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 226 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:24,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 797 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26436 states. [2022-02-15 13:16:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26436 to 26004. [2022-02-15 13:16:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26004 states, 26003 states have (on average 3.1706341575972004) internal successors, (82446), 26003 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26004 states to 26004 states and 82446 transitions. [2022-02-15 13:16:24,888 INFO L78 Accepts]: Start accepts. Automaton has 26004 states and 82446 transitions. Word has length 25 [2022-02-15 13:16:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:24,888 INFO L470 AbstractCegarLoop]: Abstraction has 26004 states and 82446 transitions. [2022-02-15 13:16:24,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 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) [2022-02-15 13:16:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 26004 states and 82446 transitions. [2022-02-15 13:16:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:24,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:24,934 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:24,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-02-15 13:16:25,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2022-02-15 13:16:25,135 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash 920052523, now seen corresponding path program 482 times [2022-02-15 13:16:25,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:25,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048846420] [2022-02-15 13:16:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:25,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:25,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:25,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048846420] [2022-02-15 13:16:25,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048846420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:25,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734434665] [2022-02-15 13:16:25,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:16:25,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:25,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:25,307 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:25,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-02-15 13:16:25,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:16:25,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:25,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:26,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734434665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:26,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:26,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-02-15 13:16:26,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531254699] [2022-02-15 13:16:26,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:26,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:16:26,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:16:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:16:26,009 INFO L87 Difference]: Start difference. First operand 26004 states and 82446 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:26,669 INFO L93 Difference]: Finished difference Result 26271 states and 82944 transitions. [2022-02-15 13:16:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:16:26,669 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:26,759 INFO L225 Difference]: With dead ends: 26271 [2022-02-15 13:16:26,759 INFO L226 Difference]: Without dead ends: 26264 [2022-02-15 13:16:26,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:26,759 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 145 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:26,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 851 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26264 states. [2022-02-15 13:16:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26264 to 26002. [2022-02-15 13:16:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26002 states, 26001 states have (on average 3.1706472827968155) internal successors, (82440), 26001 states have internal predecessors, (82440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26002 states to 26002 states and 82440 transitions. [2022-02-15 13:16:27,616 INFO L78 Accepts]: Start accepts. Automaton has 26002 states and 82440 transitions. Word has length 25 [2022-02-15 13:16:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:27,616 INFO L470 AbstractCegarLoop]: Abstraction has 26002 states and 82440 transitions. [2022-02-15 13:16:27,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26002 states and 82440 transitions. [2022-02-15 13:16:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:27,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:27,671 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:27,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Forceful destruction successful, exit code 0 [2022-02-15 13:16:27,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:27,871 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 318111907, now seen corresponding path program 483 times [2022-02-15 13:16:27,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:27,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561937606] [2022-02-15 13:16:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:27,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:28,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:28,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561937606] [2022-02-15 13:16:28,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561937606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:28,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665349394] [2022-02-15 13:16:28,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:16:28,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:28,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:28,043 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:28,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-02-15 13:16:28,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:16:28,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:16:28,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:28,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665349394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:28,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:28,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-02-15 13:16:28,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664500054] [2022-02-15 13:16:28,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:28,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:16:28,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:16:28,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:16:28,745 INFO L87 Difference]: Start difference. First operand 26002 states and 82440 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:29,350 INFO L93 Difference]: Finished difference Result 26167 states and 82719 transitions. [2022-02-15 13:16:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:16:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:29,418 INFO L225 Difference]: With dead ends: 26167 [2022-02-15 13:16:29,418 INFO L226 Difference]: Without dead ends: 26151 [2022-02-15 13:16:29,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:29,418 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 148 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:29,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 777 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2022-02-15 13:16:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25962. [2022-02-15 13:16:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25962 states, 25961 states have (on average 3.170910211471053) internal successors, (82320), 25961 states have internal predecessors, (82320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25962 states to 25962 states and 82320 transitions. [2022-02-15 13:16:30,103 INFO L78 Accepts]: Start accepts. Automaton has 25962 states and 82320 transitions. Word has length 25 [2022-02-15 13:16:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:30,103 INFO L470 AbstractCegarLoop]: Abstraction has 25962 states and 82320 transitions. [2022-02-15 13:16:30,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 25962 states and 82320 transitions. [2022-02-15 13:16:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:30,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:30,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:30,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-02-15 13:16:30,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-02-15 13:16:30,350 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash 97225579, now seen corresponding path program 484 times [2022-02-15 13:16:30,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:30,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446077129] [2022-02-15 13:16:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:30,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:30,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:30,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446077129] [2022-02-15 13:16:30,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446077129] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:30,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688364102] [2022-02-15 13:16:30,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:16:30,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:30,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:30,517 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:30,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-02-15 13:16:30,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:16:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:30,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:31,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688364102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:31,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:31,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 36 [2022-02-15 13:16:31,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155221883] [2022-02-15 13:16:31,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:31,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:16:31,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:31,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:16:31,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:16:31,226 INFO L87 Difference]: Start difference. First operand 25962 states and 82320 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:31,873 INFO L93 Difference]: Finished difference Result 26771 states and 84501 transitions. [2022-02-15 13:16:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:16:31,874 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:31,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:31,941 INFO L225 Difference]: With dead ends: 26771 [2022-02-15 13:16:31,941 INFO L226 Difference]: Without dead ends: 26761 [2022-02-15 13:16:31,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:16:31,941 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 231 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:31,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 960 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26761 states. [2022-02-15 13:16:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26761 to 26195. [2022-02-15 13:16:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26195 states, 26194 states have (on average 3.1746964953806214) internal successors, (83158), 26194 states have internal predecessors, (83158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26195 states to 26195 states and 83158 transitions. [2022-02-15 13:16:32,525 INFO L78 Accepts]: Start accepts. Automaton has 26195 states and 83158 transitions. Word has length 25 [2022-02-15 13:16:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:32,525 INFO L470 AbstractCegarLoop]: Abstraction has 26195 states and 83158 transitions. [2022-02-15 13:16:32,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 26195 states and 83158 transitions. [2022-02-15 13:16:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:32,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:32,571 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:32,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Ended with exit code 0 [2022-02-15 13:16:32,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-02-15 13:16:32,772 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1711928303, now seen corresponding path program 485 times [2022-02-15 13:16:32,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:32,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301779142] [2022-02-15 13:16:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:32,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:32,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:32,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301779142] [2022-02-15 13:16:32,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301779142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:32,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343762536] [2022-02-15 13:16:32,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:16:32,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:32,933 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:32,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-02-15 13:16:32,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:16:32,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:33,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:33,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343762536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:33,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:33,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 35 [2022-02-15 13:16:33,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643571959] [2022-02-15 13:16:33,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:33,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:16:33,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:33,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:16:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:16:33,627 INFO L87 Difference]: Start difference. First operand 26195 states and 83158 transitions. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:34,411 INFO L93 Difference]: Finished difference Result 26752 states and 84431 transitions. [2022-02-15 13:16:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:16:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:34,477 INFO L225 Difference]: With dead ends: 26752 [2022-02-15 13:16:34,477 INFO L226 Difference]: Without dead ends: 26745 [2022-02-15 13:16:34,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:34,478 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 172 mSDsluCounter, 1594 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:34,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1100 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:16:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2022-02-15 13:16:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 26191. [2022-02-15 13:16:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26191 states, 26190 states have (on average 3.174570446735395) internal successors, (83142), 26190 states have internal predecessors, (83142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26191 states to 26191 states and 83142 transitions. [2022-02-15 13:16:35,036 INFO L78 Accepts]: Start accepts. Automaton has 26191 states and 83142 transitions. Word has length 25 [2022-02-15 13:16:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:35,037 INFO L470 AbstractCegarLoop]: Abstraction has 26191 states and 83142 transitions. [2022-02-15 13:16:35,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26191 states and 83142 transitions. [2022-02-15 13:16:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:35,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:35,082 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:35,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-02-15 13:16:35,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2022-02-15 13:16:35,282 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:35,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:35,283 INFO L85 PathProgramCache]: Analyzing trace with hash 668680385, now seen corresponding path program 486 times [2022-02-15 13:16:35,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:35,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255887937] [2022-02-15 13:16:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:35,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:35,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:35,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255887937] [2022-02-15 13:16:35,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255887937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:35,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52114335] [2022-02-15 13:16:35,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:16:35,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:35,448 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:35,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-02-15 13:16:35,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:16:35,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:35,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:35,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:35,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:36,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52114335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:36,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:36,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 34 [2022-02-15 13:16:36,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807116731] [2022-02-15 13:16:36,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:36,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:16:36,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:16:36,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:16:36,173 INFO L87 Difference]: Start difference. First operand 26191 states and 83142 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:36,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:36,820 INFO L93 Difference]: Finished difference Result 26690 states and 84238 transitions. [2022-02-15 13:16:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:16:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:36,911 INFO L225 Difference]: With dead ends: 26690 [2022-02-15 13:16:36,911 INFO L226 Difference]: Without dead ends: 26677 [2022-02-15 13:16:36,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:36,911 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 248 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:36,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 841 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2022-02-15 13:16:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26188. [2022-02-15 13:16:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26188 states, 26187 states have (on average 3.1743613243212283) internal successors, (83127), 26187 states have internal predecessors, (83127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26188 states to 26188 states and 83127 transitions. [2022-02-15 13:16:37,671 INFO L78 Accepts]: Start accepts. Automaton has 26188 states and 83127 transitions. Word has length 25 [2022-02-15 13:16:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:37,671 INFO L470 AbstractCegarLoop]: Abstraction has 26188 states and 83127 transitions. [2022-02-15 13:16:37,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 26188 states and 83127 transitions. [2022-02-15 13:16:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:37,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:37,726 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:37,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Ended with exit code 0 [2022-02-15 13:16:37,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-02-15 13:16:37,927 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1203910187, now seen corresponding path program 487 times [2022-02-15 13:16:37,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:37,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626719696] [2022-02-15 13:16:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:37,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:38,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:38,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626719696] [2022-02-15 13:16:38,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626719696] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:38,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689298510] [2022-02-15 13:16:38,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:16:38,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:38,103 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:38,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-02-15 13:16:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:38,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:38,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689298510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:38,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:38,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-02-15 13:16:38,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493003336] [2022-02-15 13:16:38,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:38,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:16:38,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:16:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:16:38,797 INFO L87 Difference]: Start difference. First operand 26188 states and 83127 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-02-15 13:16:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:39,490 INFO L93 Difference]: Finished difference Result 26573 states and 83882 transitions. [2022-02-15 13:16:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:16:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 25 [2022-02-15 13:16:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:39,558 INFO L225 Difference]: With dead ends: 26573 [2022-02-15 13:16:39,558 INFO L226 Difference]: Without dead ends: 26557 [2022-02-15 13:16:39,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:39,558 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 162 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:39,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 920 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:16:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26557 states. [2022-02-15 13:16:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26557 to 26197. [2022-02-15 13:16:40,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26197 states, 26196 states have (on average 3.1737288135593222) internal successors, (83139), 26196 states have internal predecessors, (83139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26197 states to 26197 states and 83139 transitions. [2022-02-15 13:16:40,184 INFO L78 Accepts]: Start accepts. Automaton has 26197 states and 83139 transitions. Word has length 25 [2022-02-15 13:16:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:40,185 INFO L470 AbstractCegarLoop]: Abstraction has 26197 states and 83139 transitions. [2022-02-15 13:16:40,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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) [2022-02-15 13:16:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26197 states and 83139 transitions. [2022-02-15 13:16:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:40,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:40,230 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:40,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-02-15 13:16:40,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2022-02-15 13:16:40,430 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 616164865, now seen corresponding path program 488 times [2022-02-15 13:16:40,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:40,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112779923] [2022-02-15 13:16:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:40,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:40,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:40,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112779923] [2022-02-15 13:16:40,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112779923] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:40,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841754320] [2022-02-15 13:16:40,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:16:40,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:40,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:40,608 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:40,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-02-15 13:16:40,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:16:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:40,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:40,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:40,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:41,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841754320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:41,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:41,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-02-15 13:16:41,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540652321] [2022-02-15 13:16:41,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:41,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:16:41,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:16:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:16:41,346 INFO L87 Difference]: Start difference. First operand 26197 states and 83139 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:16:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:41,996 INFO L93 Difference]: Finished difference Result 26468 states and 83627 transitions. [2022-02-15 13:16:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:16:41,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:42,063 INFO L225 Difference]: With dead ends: 26468 [2022-02-15 13:16:42,063 INFO L226 Difference]: Without dead ends: 26461 [2022-02-15 13:16:42,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:42,063 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 183 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:42,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 782 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2022-02-15 13:16:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26194. [2022-02-15 13:16:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26194 states, 26193 states have (on average 3.1737487114878022) internal successors, (83130), 26193 states have internal predecessors, (83130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26194 states to 26194 states and 83130 transitions. [2022-02-15 13:16:42,644 INFO L78 Accepts]: Start accepts. Automaton has 26194 states and 83130 transitions. Word has length 25 [2022-02-15 13:16:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:42,645 INFO L470 AbstractCegarLoop]: Abstraction has 26194 states and 83130 transitions. [2022-02-15 13:16:42,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:16:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26194 states and 83130 transitions. [2022-02-15 13:16:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:42,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:42,690 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:42,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Forceful destruction successful, exit code 0 [2022-02-15 13:16:42,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-02-15 13:16:42,890 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:42,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1162178005, now seen corresponding path program 489 times [2022-02-15 13:16:42,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:42,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548188932] [2022-02-15 13:16:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:42,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:43,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:43,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548188932] [2022-02-15 13:16:43,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548188932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:43,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954171716] [2022-02-15 13:16:43,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:16:43,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:43,061 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:43,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-02-15 13:16:43,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:16:43,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:16:43,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:43,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954171716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:43,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:43,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-02-15 13:16:43,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668979310] [2022-02-15 13:16:43,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:43,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:16:43,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:16:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:16:43,759 INFO L87 Difference]: Start difference. First operand 26194 states and 83130 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:44,356 INFO L93 Difference]: Finished difference Result 26478 states and 83625 transitions. [2022-02-15 13:16:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:16:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:44,422 INFO L225 Difference]: With dead ends: 26478 [2022-02-15 13:16:44,423 INFO L226 Difference]: Without dead ends: 26462 [2022-02-15 13:16:44,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:44,423 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 209 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:44,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 723 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26462 states. [2022-02-15 13:16:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26462 to 26156. [2022-02-15 13:16:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26156 states, 26155 states have (on average 3.172968839610017) internal successors, (82989), 26155 states have internal predecessors, (82989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26156 states to 26156 states and 82989 transitions. [2022-02-15 13:16:45,089 INFO L78 Accepts]: Start accepts. Automaton has 26156 states and 82989 transitions. Word has length 25 [2022-02-15 13:16:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:45,089 INFO L470 AbstractCegarLoop]: Abstraction has 26156 states and 82989 transitions. [2022-02-15 13:16:45,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 26156 states and 82989 transitions. [2022-02-15 13:16:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:45,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:45,135 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:45,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Forceful destruction successful, exit code 0 [2022-02-15 13:16:45,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:45,335 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash -864125047, now seen corresponding path program 490 times [2022-02-15 13:16:45,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:45,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378555767] [2022-02-15 13:16:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:45,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:45,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:45,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378555767] [2022-02-15 13:16:45,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378555767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:45,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494653480] [2022-02-15 13:16:45,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:16:45,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:45,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:45,513 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:45,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-02-15 13:16:45,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:16:45,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:45,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:16:45,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:46,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494653480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:46,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:46,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-02-15 13:16:46,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516918481] [2022-02-15 13:16:46,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:46,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:16:46,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:16:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:16:46,183 INFO L87 Difference]: Start difference. First operand 26156 states and 82989 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:16:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:46,784 INFO L93 Difference]: Finished difference Result 26350 states and 83325 transitions. [2022-02-15 13:16:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:16:46,785 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:46,846 INFO L225 Difference]: With dead ends: 26350 [2022-02-15 13:16:46,846 INFO L226 Difference]: Without dead ends: 26331 [2022-02-15 13:16:46,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:16:46,847 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 188 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:46,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 660 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2022-02-15 13:16:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 26122. [2022-02-15 13:16:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26122 states, 26121 states have (on average 3.173193981853681) internal successors, (82887), 26121 states have internal predecessors, (82887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26122 states to 26122 states and 82887 transitions. [2022-02-15 13:16:47,382 INFO L78 Accepts]: Start accepts. Automaton has 26122 states and 82887 transitions. Word has length 25 [2022-02-15 13:16:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:47,382 INFO L470 AbstractCegarLoop]: Abstraction has 26122 states and 82887 transitions. [2022-02-15 13:16:47,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:16:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 26122 states and 82887 transitions. [2022-02-15 13:16:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:47,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:47,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:47,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Ended with exit code 0 [2022-02-15 13:16:47,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:47,628 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash 306878571, now seen corresponding path program 491 times [2022-02-15 13:16:47,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:47,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164904277] [2022-02-15 13:16:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:47,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:47,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:47,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164904277] [2022-02-15 13:16:47,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164904277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:47,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328108137] [2022-02-15 13:16:47,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:16:47,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:47,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:47,791 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:47,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-02-15 13:16:47,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:16:47,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:47,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:48,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:48,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328108137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:48,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:48,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 36 [2022-02-15 13:16:48,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409488819] [2022-02-15 13:16:48,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:48,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:16:48,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:16:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:16:48,534 INFO L87 Difference]: Start difference. First operand 26122 states and 82887 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:49,170 INFO L93 Difference]: Finished difference Result 26878 states and 84798 transitions. [2022-02-15 13:16:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:16:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:49,244 INFO L225 Difference]: With dead ends: 26878 [2022-02-15 13:16:49,244 INFO L226 Difference]: Without dead ends: 26868 [2022-02-15 13:16:49,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:16:49,244 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 226 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:49,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 965 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2022-02-15 13:16:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26338. [2022-02-15 13:16:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26338 states, 26337 states have (on average 3.1761780005315714) internal successors, (83651), 26337 states have internal predecessors, (83651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26338 states to 26338 states and 83651 transitions. [2022-02-15 13:16:49,942 INFO L78 Accepts]: Start accepts. Automaton has 26338 states and 83651 transitions. Word has length 25 [2022-02-15 13:16:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:49,942 INFO L470 AbstractCegarLoop]: Abstraction has 26338 states and 83651 transitions. [2022-02-15 13:16:49,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 26338 states and 83651 transitions. [2022-02-15 13:16:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:49,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:49,997 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:50,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Ended with exit code 0 [2022-02-15 13:16:50,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2022-02-15 13:16:50,198 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1921581295, now seen corresponding path program 492 times [2022-02-15 13:16:50,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:50,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543470213] [2022-02-15 13:16:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:50,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:50,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:50,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543470213] [2022-02-15 13:16:50,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543470213] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:50,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609504931] [2022-02-15 13:16:50,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:16:50,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:50,356 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:50,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-02-15 13:16:50,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:16:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:50,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:50,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:51,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609504931] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:51,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:51,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 35 [2022-02-15 13:16:51,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471858862] [2022-02-15 13:16:51,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:51,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:16:51,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:51,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:16:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:16:51,028 INFO L87 Difference]: Start difference. First operand 26338 states and 83651 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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) [2022-02-15 13:16:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:51,600 INFO L93 Difference]: Finished difference Result 26859 states and 84730 transitions. [2022-02-15 13:16:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:16:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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 [2022-02-15 13:16:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:51,669 INFO L225 Difference]: With dead ends: 26859 [2022-02-15 13:16:51,669 INFO L226 Difference]: Without dead ends: 26852 [2022-02-15 13:16:51,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:51,669 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 268 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:51,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 783 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:16:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2022-02-15 13:16:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 26333. [2022-02-15 13:16:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26333 states, 26332 states have (on average 3.1760215707124413) internal successors, (83631), 26332 states have internal predecessors, (83631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26333 states to 26333 states and 83631 transitions. [2022-02-15 13:16:52,342 INFO L78 Accepts]: Start accepts. Automaton has 26333 states and 83631 transitions. Word has length 25 [2022-02-15 13:16:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:52,342 INFO L470 AbstractCegarLoop]: Abstraction has 26333 states and 83631 transitions. [2022-02-15 13:16:52,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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) [2022-02-15 13:16:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 26333 states and 83631 transitions. [2022-02-15 13:16:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:52,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:52,387 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:52,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Ended with exit code 0 [2022-02-15 13:16:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:52,587 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash 878333377, now seen corresponding path program 493 times [2022-02-15 13:16:52,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:52,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569681419] [2022-02-15 13:16:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:52,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:52,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:52,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569681419] [2022-02-15 13:16:52,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569681419] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:52,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716050429] [2022-02-15 13:16:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:16:52,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:52,753 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:52,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-02-15 13:16:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:53,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:53,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716050429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:53,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:53,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 34 [2022-02-15 13:16:53,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582504394] [2022-02-15 13:16:53,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:53,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:16:53,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:53,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:16:53,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:16:53,437 INFO L87 Difference]: Start difference. First operand 26333 states and 83631 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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) [2022-02-15 13:16:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:54,167 INFO L93 Difference]: Finished difference Result 26840 states and 84655 transitions. [2022-02-15 13:16:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:16:54,167 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 25 [2022-02-15 13:16:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:54,235 INFO L225 Difference]: With dead ends: 26840 [2022-02-15 13:16:54,235 INFO L226 Difference]: Without dead ends: 26827 [2022-02-15 13:16:54,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:54,235 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 191 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:54,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1080 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:16:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2022-02-15 13:16:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 26329. [2022-02-15 13:16:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26329 states, 26328 states have (on average 3.175820419325433) internal successors, (83613), 26328 states have internal predecessors, (83613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26329 states to 26329 states and 83613 transitions. [2022-02-15 13:16:54,812 INFO L78 Accepts]: Start accepts. Automaton has 26329 states and 83613 transitions. Word has length 25 [2022-02-15 13:16:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 26329 states and 83613 transitions. [2022-02-15 13:16:54,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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) [2022-02-15 13:16:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 26329 states and 83613 transitions. [2022-02-15 13:16:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:54,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:54,928 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:54,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-02-15 13:16:55,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2022-02-15 13:16:55,129 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1413563179, now seen corresponding path program 494 times [2022-02-15 13:16:55,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:55,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641499087] [2022-02-15 13:16:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:55,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:55,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:55,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641499087] [2022-02-15 13:16:55,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641499087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:55,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834266141] [2022-02-15 13:16:55,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:16:55,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:55,303 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:55,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-02-15 13:16:55,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:16:55,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:55,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:55,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:55,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:55,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834266141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:55,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:55,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 33 [2022-02-15 13:16:55,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110508438] [2022-02-15 13:16:55,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:55,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:16:55,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:16:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:16:55,978 INFO L87 Difference]: Start difference. First operand 26329 states and 83613 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 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) [2022-02-15 13:16:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:56,748 INFO L93 Difference]: Finished difference Result 26818 states and 84533 transitions. [2022-02-15 13:16:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:16:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:16:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:56,817 INFO L225 Difference]: With dead ends: 26818 [2022-02-15 13:16:56,817 INFO L226 Difference]: Without dead ends: 26802 [2022-02-15 13:16:56,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:56,818 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 218 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:56,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1038 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:16:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26802 states. [2022-02-15 13:16:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26802 to 26325. [2022-02-15 13:16:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26325 states, 26324 states have (on average 3.175657194955174) internal successors, (83596), 26324 states have internal predecessors, (83596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26325 states to 26325 states and 83596 transitions. [2022-02-15 13:16:57,394 INFO L78 Accepts]: Start accepts. Automaton has 26325 states and 83596 transitions. Word has length 25 [2022-02-15 13:16:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:57,394 INFO L470 AbstractCegarLoop]: Abstraction has 26325 states and 83596 transitions. [2022-02-15 13:16:57,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 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) [2022-02-15 13:16:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 26325 states and 83596 transitions. [2022-02-15 13:16:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:57,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:57,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:57,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-02-15 13:16:57,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:57,641 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:16:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:16:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash 825817857, now seen corresponding path program 495 times [2022-02-15 13:16:57,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:16:57,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500706705] [2022-02-15 13:16:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:16:57,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:16:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:16:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:57,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:16:57,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500706705] [2022-02-15 13:16:57,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500706705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:16:57,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724322974] [2022-02-15 13:16:57,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:16:57,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:16:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:16:57,817 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:16:57,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-02-15 13:16:57,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:16:57,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:16:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:16:57,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:16:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:58,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:16:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:16:58,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724322974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:16:58,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:16:58,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-02-15 13:16:58,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024933613] [2022-02-15 13:16:58,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:16:58,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:16:58,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:16:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:16:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:16:58,464 INFO L87 Difference]: Start difference. First operand 26325 states and 83596 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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) [2022-02-15 13:16:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:16:59,235 INFO L93 Difference]: Finished difference Result 26741 states and 84363 transitions. [2022-02-15 13:16:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:16:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 25 [2022-02-15 13:16:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:16:59,304 INFO L225 Difference]: With dead ends: 26741 [2022-02-15 13:16:59,304 INFO L226 Difference]: Without dead ends: 26722 [2022-02-15 13:16:59,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:16:59,305 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:16:59,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 965 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:16:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states. [2022-02-15 13:16:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26722 to 26330. [2022-02-15 13:16:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26330 states, 26329 states have (on average 3.1751300846974817) internal successors, (83598), 26329 states have internal predecessors, (83598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:16:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26330 states to 26330 states and 83598 transitions. [2022-02-15 13:16:59,894 INFO L78 Accepts]: Start accepts. Automaton has 26330 states and 83598 transitions. Word has length 25 [2022-02-15 13:16:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:16:59,894 INFO L470 AbstractCegarLoop]: Abstraction has 26330 states and 83598 transitions. [2022-02-15 13:16:59,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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) [2022-02-15 13:16:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 26330 states and 83598 transitions. [2022-02-15 13:16:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:16:59,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:16:59,938 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:16:59,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Ended with exit code 0 [2022-02-15 13:17:00,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:00,138 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -214417941, now seen corresponding path program 496 times [2022-02-15 13:17:00,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:00,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287476727] [2022-02-15 13:17:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:00,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:00,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:00,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287476727] [2022-02-15 13:17:00,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287476727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:00,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856703954] [2022-02-15 13:17:00,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:17:00,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:00,317 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:00,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-02-15 13:17:00,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:17:00,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:00,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:00,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856703954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:00,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:00,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2022-02-15 13:17:00,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379027640] [2022-02-15 13:17:00,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:00,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:17:00,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:17:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:17:00,939 INFO L87 Difference]: Start difference. First operand 26330 states and 83598 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:01,649 INFO L93 Difference]: Finished difference Result 26637 states and 84135 transitions. [2022-02-15 13:17:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:17:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:01,721 INFO L225 Difference]: With dead ends: 26637 [2022-02-15 13:17:01,721 INFO L226 Difference]: Without dead ends: 26630 [2022-02-15 13:17:01,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:17:01,722 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 164 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:01,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 831 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:17:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26630 states. [2022-02-15 13:17:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26630 to 26326. [2022-02-15 13:17:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26325 states have (on average 3.175156695156695) internal successors, (83586), 26325 states have internal predecessors, (83586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 83586 transitions. [2022-02-15 13:17:02,419 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 83586 transitions. Word has length 25 [2022-02-15 13:17:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:02,419 INFO L470 AbstractCegarLoop]: Abstraction has 26326 states and 83586 transitions. [2022-02-15 13:17:02,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 83586 transitions. [2022-02-15 13:17:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:02,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:02,463 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:02,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Forceful destruction successful, exit code 0 [2022-02-15 13:17:02,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:02,664 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:02,664 INFO L85 PathProgramCache]: Analyzing trace with hash 193474979, now seen corresponding path program 497 times [2022-02-15 13:17:02,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:02,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677918719] [2022-02-15 13:17:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:02,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:02,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:02,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677918719] [2022-02-15 13:17:02,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677918719] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:02,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863406205] [2022-02-15 13:17:02,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:17:02,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:02,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:02,831 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:02,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-02-15 13:17:02,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:17:02,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:02,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:17:03,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:03,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863406205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:03,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:03,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 16] total 33 [2022-02-15 13:17:03,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581703695] [2022-02-15 13:17:03,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:03,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:17:03,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:17:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:17:03,526 INFO L87 Difference]: Start difference. First operand 26326 states and 83586 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:04,157 INFO L93 Difference]: Finished difference Result 26655 states and 84164 transitions. [2022-02-15 13:17:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:17:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:04,223 INFO L225 Difference]: With dead ends: 26655 [2022-02-15 13:17:04,223 INFO L226 Difference]: Without dead ends: 26639 [2022-02-15 13:17:04,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:17:04,224 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 159 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:04,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 781 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:17:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26639 states. [2022-02-15 13:17:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26639 to 26300. [2022-02-15 13:17:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26300 states, 26299 states have (on average 3.1746073995208945) internal successors, (83489), 26299 states have internal predecessors, (83489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26300 states to 26300 states and 83489 transitions. [2022-02-15 13:17:04,792 INFO L78 Accepts]: Start accepts. Automaton has 26300 states and 83489 transitions. Word has length 25 [2022-02-15 13:17:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:04,792 INFO L470 AbstractCegarLoop]: Abstraction has 26300 states and 83489 transitions. [2022-02-15 13:17:04,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 26300 states and 83489 transitions. [2022-02-15 13:17:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:04,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:04,838 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:04,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-02-15 13:17:05,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-02-15 13:17:05,039 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash 491527937, now seen corresponding path program 498 times [2022-02-15 13:17:05,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:05,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426471903] [2022-02-15 13:17:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:05,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:05,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:05,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426471903] [2022-02-15 13:17:05,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426471903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:05,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282413409] [2022-02-15 13:17:05,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:17:05,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:05,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:05,225 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:05,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-02-15 13:17:05,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:17:05,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:05,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:17:05,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:05,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282413409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:05,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:05,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 32 [2022-02-15 13:17:05,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112747814] [2022-02-15 13:17:05,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:05,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:17:05,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:17:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:17:05,904 INFO L87 Difference]: Start difference. First operand 26300 states and 83489 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:17:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:06,611 INFO L93 Difference]: Finished difference Result 26683 states and 84164 transitions. [2022-02-15 13:17:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:17:06,612 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:06,679 INFO L225 Difference]: With dead ends: 26683 [2022-02-15 13:17:06,680 INFO L226 Difference]: Without dead ends: 26664 [2022-02-15 13:17:06,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:17:06,680 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 230 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:06,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 699 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:17:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26664 states. [2022-02-15 13:17:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26664 to 26276. [2022-02-15 13:17:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26276 states, 26275 states have (on average 3.1743482397716463) internal successors, (83406), 26275 states have internal predecessors, (83406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26276 states to 26276 states and 83406 transitions. [2022-02-15 13:17:07,263 INFO L78 Accepts]: Start accepts. Automaton has 26276 states and 83406 transitions. Word has length 25 [2022-02-15 13:17:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:07,263 INFO L470 AbstractCegarLoop]: Abstraction has 26276 states and 83406 transitions. [2022-02-15 13:17:07,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 32 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) [2022-02-15 13:17:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 26276 states and 83406 transitions. [2022-02-15 13:17:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:07,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:07,309 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:07,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Forceful destruction successful, exit code 0 [2022-02-15 13:17:07,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2022-02-15 13:17:07,509 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:07,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1141235043, now seen corresponding path program 499 times [2022-02-15 13:17:07,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:07,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785028032] [2022-02-15 13:17:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:07,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:07,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:07,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785028032] [2022-02-15 13:17:07,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785028032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:07,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704980973] [2022-02-15 13:17:07,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:17:07,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:07,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:07,690 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:07,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-02-15 13:17:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:07,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:17:07,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:08,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704980973] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:08,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:08,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2022-02-15 13:17:08,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143746368] [2022-02-15 13:17:08,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:08,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:17:08,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:17:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:17:08,322 INFO L87 Difference]: Start difference. First operand 26276 states and 83406 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:08,956 INFO L93 Difference]: Finished difference Result 26515 states and 83825 transitions. [2022-02-15 13:17:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:17:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:09,024 INFO L225 Difference]: With dead ends: 26515 [2022-02-15 13:17:09,025 INFO L226 Difference]: Without dead ends: 26493 [2022-02-15 13:17:09,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:17:09,025 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 163 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:09,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 636 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:17:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26493 states. [2022-02-15 13:17:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26493 to 26252. [2022-02-15 13:17:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26252 states, 26251 states have (on average 3.174507637804274) internal successors, (83334), 26251 states have internal predecessors, (83334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26252 states to 26252 states and 83334 transitions. [2022-02-15 13:17:09,654 INFO L78 Accepts]: Start accepts. Automaton has 26252 states and 83334 transitions. Word has length 25 [2022-02-15 13:17:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:09,654 INFO L470 AbstractCegarLoop]: Abstraction has 26252 states and 83334 transitions. [2022-02-15 13:17:09,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26252 states and 83334 transitions. [2022-02-15 13:17:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:09,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:09,701 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:09,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-02-15 13:17:09,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:09,902 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:09,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1783813269, now seen corresponding path program 500 times [2022-02-15 13:17:09,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:09,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473221503] [2022-02-15 13:17:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:09,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:10,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:10,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473221503] [2022-02-15 13:17:10,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473221503] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:10,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422336904] [2022-02-15 13:17:10,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:17:10,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:10,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:10,066 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:10,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-02-15 13:17:10,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:17:10,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:10,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:10,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422336904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:10,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:10,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 36 [2022-02-15 13:17:10,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84275523] [2022-02-15 13:17:10,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:10,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 13:17:10,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 13:17:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:17:10,749 INFO L87 Difference]: Start difference. First operand 26252 states and 83334 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 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) [2022-02-15 13:17:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:11,397 INFO L93 Difference]: Finished difference Result 27031 states and 85190 transitions. [2022-02-15 13:17:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:17:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 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 [2022-02-15 13:17:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:11,467 INFO L225 Difference]: With dead ends: 27031 [2022-02-15 13:17:11,468 INFO L226 Difference]: Without dead ends: 27021 [2022-02-15 13:17:11,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:17:11,468 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 258 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:11,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 933 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:17:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2022-02-15 13:17:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26424. [2022-02-15 13:17:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26424 states, 26423 states have (on average 3.1765885781326872) internal successors, (83935), 26423 states have internal predecessors, (83935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 83935 transitions. [2022-02-15 13:17:12,071 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 83935 transitions. Word has length 25 [2022-02-15 13:17:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:12,071 INFO L470 AbstractCegarLoop]: Abstraction has 26424 states and 83935 transitions. [2022-02-15 13:17:12,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 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) [2022-02-15 13:17:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 83935 transitions. [2022-02-15 13:17:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:12,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:12,118 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:12,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Ended with exit code 0 [2022-02-15 13:17:12,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:12,318 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:12,319 INFO L85 PathProgramCache]: Analyzing trace with hash -169110545, now seen corresponding path program 501 times [2022-02-15 13:17:12,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:12,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778176704] [2022-02-15 13:17:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:12,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:12,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:12,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778176704] [2022-02-15 13:17:12,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778176704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:12,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616796819] [2022-02-15 13:17:12,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:17:12,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:12,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:12,475 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:12,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-02-15 13:17:12,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:17:12,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:13,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616796819] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:13,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:13,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 35 [2022-02-15 13:17:13,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792548989] [2022-02-15 13:17:13,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:13,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 13:17:13,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:13,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 13:17:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:17:13,203 INFO L87 Difference]: Start difference. First operand 26424 states and 83935 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:13,843 INFO L93 Difference]: Finished difference Result 27015 states and 85143 transitions. [2022-02-15 13:17:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:17:13,843 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:13,903 INFO L225 Difference]: With dead ends: 27015 [2022-02-15 13:17:13,903 INFO L226 Difference]: Without dead ends: 27008 [2022-02-15 13:17:13,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:17:13,904 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 226 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:13,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 960 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:17:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27008 states. [2022-02-15 13:17:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27008 to 26408. [2022-02-15 13:17:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26408 states, 26407 states have (on average 3.176506229408869) internal successors, (83882), 26407 states have internal predecessors, (83882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26408 states to 26408 states and 83882 transitions. [2022-02-15 13:17:14,456 INFO L78 Accepts]: Start accepts. Automaton has 26408 states and 83882 transitions. Word has length 25 [2022-02-15 13:17:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:14,456 INFO L470 AbstractCegarLoop]: Abstraction has 26408 states and 83882 transitions. [2022-02-15 13:17:14,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 26408 states and 83882 transitions. [2022-02-15 13:17:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:14,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:14,500 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:14,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Ended with exit code 0 [2022-02-15 13:17:14,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:14,700 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1212358463, now seen corresponding path program 502 times [2022-02-15 13:17:14,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:14,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974801042] [2022-02-15 13:17:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:14,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:14,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:14,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974801042] [2022-02-15 13:17:14,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974801042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:14,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88839001] [2022-02-15 13:17:14,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:17:14,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:14,882 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:14,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-02-15 13:17:14,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:17:14,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:14,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:14,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:15,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:15,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88839001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:15,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:15,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 34 [2022-02-15 13:17:15,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496052492] [2022-02-15 13:17:15,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:15,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 13:17:15,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 13:17:15,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:17:15,551 INFO L87 Difference]: Start difference. First operand 26408 states and 83882 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 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) [2022-02-15 13:17:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:16,218 INFO L93 Difference]: Finished difference Result 27006 states and 85093 transitions. [2022-02-15 13:17:16,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:17:16,218 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:16,289 INFO L225 Difference]: With dead ends: 27006 [2022-02-15 13:17:16,290 INFO L226 Difference]: Without dead ends: 26993 [2022-02-15 13:17:16,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:17:16,290 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 211 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:16,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 898 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:17:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2022-02-15 13:17:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26403. [2022-02-15 13:17:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26403 states, 26402 states have (on average 3.176312400575714) internal successors, (83861), 26402 states have internal predecessors, (83861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26403 states to 26403 states and 83861 transitions. [2022-02-15 13:17:16,923 INFO L78 Accepts]: Start accepts. Automaton has 26403 states and 83861 transitions. Word has length 25 [2022-02-15 13:17:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:16,923 INFO L470 AbstractCegarLoop]: Abstraction has 26403 states and 83861 transitions. [2022-02-15 13:17:16,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 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) [2022-02-15 13:17:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 26403 states and 83861 transitions. [2022-02-15 13:17:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:16,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:16,969 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:16,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Ended with exit code 0 [2022-02-15 13:17:17,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:17,169 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:17,170 INFO L85 PathProgramCache]: Analyzing trace with hash -677128661, now seen corresponding path program 503 times [2022-02-15 13:17:17,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:17,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905829631] [2022-02-15 13:17:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:17,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:17,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:17,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905829631] [2022-02-15 13:17:17,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905829631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:17,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122794140] [2022-02-15 13:17:17,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:17:17,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:17,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:17,337 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:17,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-02-15 13:17:17,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:17:17,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:17,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:17,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122794140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:17,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:17,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2022-02-15 13:17:17,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191955555] [2022-02-15 13:17:17,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:17,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 13:17:17,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 13:17:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:17:17,989 INFO L87 Difference]: Start difference. First operand 26403 states and 83861 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-02-15 13:17:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:18,682 INFO L93 Difference]: Finished difference Result 27006 states and 85046 transitions. [2022-02-15 13:17:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:17:18,682 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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 25 [2022-02-15 13:17:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:18,752 INFO L225 Difference]: With dead ends: 27006 [2022-02-15 13:17:18,752 INFO L226 Difference]: Without dead ends: 26990 [2022-02-15 13:17:18,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:17:18,753 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 231 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:18,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 894 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:17:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2022-02-15 13:17:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26398. [2022-02-15 13:17:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26398 states, 26397 states have (on average 3.176156381406978) internal successors, (83841), 26397 states have internal predecessors, (83841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26398 states to 26398 states and 83841 transitions. [2022-02-15 13:17:19,521 INFO L78 Accepts]: Start accepts. Automaton has 26398 states and 83841 transitions. Word has length 25 [2022-02-15 13:17:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:19,521 INFO L470 AbstractCegarLoop]: Abstraction has 26398 states and 83841 transitions. [2022-02-15 13:17:19,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 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) [2022-02-15 13:17:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 26398 states and 83841 transitions. [2022-02-15 13:17:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:19,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:19,566 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:19,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Ended with exit code 0 [2022-02-15 13:17:19,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2022-02-15 13:17:19,767 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1264873983, now seen corresponding path program 504 times [2022-02-15 13:17:19,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:19,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881221012] [2022-02-15 13:17:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:19,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:19,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:19,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881221012] [2022-02-15 13:17:19,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881221012] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:19,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473469945] [2022-02-15 13:17:19,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:17:19,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:19,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:19,941 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:19,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-02-15 13:17:19,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:17:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:20,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:20,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473469945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:20,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:20,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 32 [2022-02-15 13:17:20,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593437360] [2022-02-15 13:17:20,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:20,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 13:17:20,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 13:17:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:17:20,580 INFO L87 Difference]: Start difference. First operand 26398 states and 83841 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:21,396 INFO L93 Difference]: Finished difference Result 27010 states and 85005 transitions. [2022-02-15 13:17:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:17:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:21,465 INFO L225 Difference]: With dead ends: 27010 [2022-02-15 13:17:21,465 INFO L226 Difference]: Without dead ends: 26991 [2022-02-15 13:17:21,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:17:21,465 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 197 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:21,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1017 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:17:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26991 states. [2022-02-15 13:17:22,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26991 to 26393. [2022-02-15 13:17:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26393 states, 26392 states have (on average 3.176038193391937) internal successors, (83822), 26392 states have internal predecessors, (83822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26393 states to 26393 states and 83822 transitions. [2022-02-15 13:17:22,167 INFO L78 Accepts]: Start accepts. Automaton has 26393 states and 83822 transitions. Word has length 25 [2022-02-15 13:17:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:22,167 INFO L470 AbstractCegarLoop]: Abstraction has 26393 states and 83822 transitions. [2022-02-15 13:17:22,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 26393 states and 83822 transitions. [2022-02-15 13:17:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:22,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:22,212 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:22,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-02-15 13:17:22,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:22,413 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1989857515, now seen corresponding path program 505 times [2022-02-15 13:17:22,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:22,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738654295] [2022-02-15 13:17:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:22,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:22,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:22,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738654295] [2022-02-15 13:17:22,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738654295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:22,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971749318] [2022-02-15 13:17:22,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:17:22,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:22,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:22,594 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:22,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-02-15 13:17:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:22,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:23,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971749318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:23,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:23,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2022-02-15 13:17:23,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877199684] [2022-02-15 13:17:23,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:23,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 13:17:23,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 13:17:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:17:23,218 INFO L87 Difference]: Start difference. First operand 26393 states and 83822 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 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) [2022-02-15 13:17:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:23,982 INFO L93 Difference]: Finished difference Result 26898 states and 84763 transitions. [2022-02-15 13:17:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:17:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 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 [2022-02-15 13:17:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:24,050 INFO L225 Difference]: With dead ends: 26898 [2022-02-15 13:17:24,050 INFO L226 Difference]: Without dead ends: 26876 [2022-02-15 13:17:24,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:17:24,051 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 200 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:24,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 867 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:17:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26876 states. [2022-02-15 13:17:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26876 to 26388. [2022-02-15 13:17:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26388 states, 26387 states have (on average 3.175957858036154) internal successors, (83804), 26387 states have internal predecessors, (83804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26388 states to 26388 states and 83804 transitions. [2022-02-15 13:17:24,691 INFO L78 Accepts]: Start accepts. Automaton has 26388 states and 83804 transitions. Word has length 25 [2022-02-15 13:17:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:24,691 INFO L470 AbstractCegarLoop]: Abstraction has 26388 states and 83804 transitions. [2022-02-15 13:17:24,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 31 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) [2022-02-15 13:17:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 26388 states and 83804 transitions. [2022-02-15 13:17:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:17:24,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:24,736 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:24,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Ended with exit code 0 [2022-02-15 13:17:24,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:24,936 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:24,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash -192681151, now seen corresponding path program 506 times [2022-02-15 13:17:24,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:24,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405386078] [2022-02-15 13:17:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:24,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:25,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:25,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405386078] [2022-02-15 13:17:25,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405386078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:25,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578329901] [2022-02-15 13:17:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:17:25,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:25,123 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:25,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-02-15 13:17:25,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:17:25,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:25,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-15 13:17:25,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:25,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:25,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578329901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:25,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:25,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 30 [2022-02-15 13:17:25,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696383623] [2022-02-15 13:17:25,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:25,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:17:25,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:25,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:17:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:17:25,716 INFO L87 Difference]: Start difference. First operand 26388 states and 83804 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2022-02-15 13:17:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:26,425 INFO L93 Difference]: Finished difference Result 26777 states and 84498 transitions. [2022-02-15 13:17:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:17:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:17:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:26,495 INFO L225 Difference]: With dead ends: 26777 [2022-02-15 13:17:26,495 INFO L226 Difference]: Without dead ends: 26770 [2022-02-15 13:17:26,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:17:26,496 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 209 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:26,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 724 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:17:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26770 states. [2022-02-15 13:17:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26770 to 26383. [2022-02-15 13:17:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26383 states, 26382 states have (on average 3.1759912061253885) internal successors, (83789), 26382 states have internal predecessors, (83789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26383 states to 26383 states and 83789 transitions. [2022-02-15 13:17:27,204 INFO L78 Accepts]: Start accepts. Automaton has 26383 states and 83789 transitions. Word has length 25 [2022-02-15 13:17:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:27,204 INFO L470 AbstractCegarLoop]: Abstraction has 26383 states and 83789 transitions. [2022-02-15 13:17:27,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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) [2022-02-15 13:17:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 26383 states and 83789 transitions. [2022-02-15 13:17:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:27,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:27,262 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:27,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Ended with exit code 0 [2022-02-15 13:17:27,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:27,462 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1473663481, now seen corresponding path program 507 times [2022-02-15 13:17:27,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:27,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24383436] [2022-02-15 13:17:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:27,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:27,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:27,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24383436] [2022-02-15 13:17:27,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24383436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:27,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471226921] [2022-02-15 13:17:27,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:17:27,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:27,545 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:27,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-02-15 13:17:27,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:17:27,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:27,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:27,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:27,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:27,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471226921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:27,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:27,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2022-02-15 13:17:27,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189610651] [2022-02-15 13:17:27,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:27,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:17:27,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:27,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:17:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:17:27,726 INFO L87 Difference]: Start difference. First operand 26383 states and 83789 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:28,069 INFO L93 Difference]: Finished difference Result 34009 states and 106082 transitions. [2022-02-15 13:17:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 13:17:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:28,183 INFO L225 Difference]: With dead ends: 34009 [2022-02-15 13:17:28,183 INFO L226 Difference]: Without dead ends: 33983 [2022-02-15 13:17:28,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:17:28,183 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:28,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 121 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:17:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2022-02-15 13:17:28,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 26378. [2022-02-15 13:17:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26378 states, 26377 states have (on average 3.1762141259430563) internal successors, (83779), 26377 states have internal predecessors, (83779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26378 states to 26378 states and 83779 transitions. [2022-02-15 13:17:29,059 INFO L78 Accepts]: Start accepts. Automaton has 26378 states and 83779 transitions. Word has length 26 [2022-02-15 13:17:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:29,059 INFO L470 AbstractCegarLoop]: Abstraction has 26378 states and 83779 transitions. [2022-02-15 13:17:29,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 26378 states and 83779 transitions. [2022-02-15 13:17:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:29,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:29,115 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:29,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Ended with exit code 0 [2022-02-15 13:17:29,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2022-02-15 13:17:29,315 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1240304151, now seen corresponding path program 508 times [2022-02-15 13:17:29,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:29,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562659245] [2022-02-15 13:17:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:29,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:29,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:29,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562659245] [2022-02-15 13:17:29,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562659245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:29,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447345184] [2022-02-15 13:17:29,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:17:29,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:29,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:29,399 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:29,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-02-15 13:17:29,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:17:29,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:29,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:29,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:29,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447345184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:29,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:29,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2022-02-15 13:17:29,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539799602] [2022-02-15 13:17:29,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:29,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:17:29,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:17:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:17:29,564 INFO L87 Difference]: Start difference. First operand 26378 states and 83779 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:29,900 INFO L93 Difference]: Finished difference Result 34313 states and 106998 transitions. [2022-02-15 13:17:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:17:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:30,016 INFO L225 Difference]: With dead ends: 34313 [2022-02-15 13:17:30,017 INFO L226 Difference]: Without dead ends: 34313 [2022-02-15 13:17:30,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:17:30,017 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 115 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:30,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 137 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:17:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34313 states. [2022-02-15 13:17:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34313 to 26571. [2022-02-15 13:17:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26571 states, 26570 states have (on average 3.174934136243884) internal successors, (84358), 26570 states have internal predecessors, (84358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26571 states to 26571 states and 84358 transitions. [2022-02-15 13:17:30,995 INFO L78 Accepts]: Start accepts. Automaton has 26571 states and 84358 transitions. Word has length 26 [2022-02-15 13:17:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 26571 states and 84358 transitions. [2022-02-15 13:17:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 26571 states and 84358 transitions. [2022-02-15 13:17:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:31,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:31,053 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:31,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Ended with exit code 0 [2022-02-15 13:17:31,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-02-15 13:17:31,253 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1349081931, now seen corresponding path program 509 times [2022-02-15 13:17:31,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:31,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133757148] [2022-02-15 13:17:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:31,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:31,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:31,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133757148] [2022-02-15 13:17:31,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133757148] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:31,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175058867] [2022-02-15 13:17:31,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:17:31,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:31,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:31,335 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:31,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-02-15 13:17:31,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:17:31,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:31,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:31,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:31,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:31,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175058867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:31,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:31,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:31,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090898015] [2022-02-15 13:17:31,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:31,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:31,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:31,524 INFO L87 Difference]: Start difference. First operand 26571 states and 84358 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:32,736 INFO L93 Difference]: Finished difference Result 38199 states and 118872 transitions. [2022-02-15 13:17:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:17:32,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:32,863 INFO L225 Difference]: With dead ends: 38199 [2022-02-15 13:17:32,863 INFO L226 Difference]: Without dead ends: 38187 [2022-02-15 13:17:32,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:17:32,864 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 407 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:32,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 221 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:17:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38187 states. [2022-02-15 13:17:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38187 to 30268. [2022-02-15 13:17:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30268 states, 30267 states have (on average 3.1952621667162258) internal successors, (96711), 30267 states have internal predecessors, (96711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30268 states to 30268 states and 96711 transitions. [2022-02-15 13:17:33,837 INFO L78 Accepts]: Start accepts. Automaton has 30268 states and 96711 transitions. Word has length 26 [2022-02-15 13:17:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:33,838 INFO L470 AbstractCegarLoop]: Abstraction has 30268 states and 96711 transitions. [2022-02-15 13:17:33,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30268 states and 96711 transitions. [2022-02-15 13:17:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:33,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:33,902 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:33,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Ended with exit code 0 [2022-02-15 13:17:34,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:34,103 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1920536737, now seen corresponding path program 510 times [2022-02-15 13:17:34,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:34,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182933083] [2022-02-15 13:17:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:34,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:34,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:34,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182933083] [2022-02-15 13:17:34,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182933083] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:34,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870883059] [2022-02-15 13:17:34,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:17:34,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:34,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:34,184 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:34,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-02-15 13:17:34,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:17:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:34,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:34,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870883059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:34,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:34,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:34,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716897042] [2022-02-15 13:17:34,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:34,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:34,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:34,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:34,453 INFO L87 Difference]: Start difference. First operand 30268 states and 96711 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:35,579 INFO L93 Difference]: Finished difference Result 37783 states and 117254 transitions. [2022-02-15 13:17:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-15 13:17:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:35,710 INFO L225 Difference]: With dead ends: 37783 [2022-02-15 13:17:35,710 INFO L226 Difference]: Without dead ends: 37777 [2022-02-15 13:17:35,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2878 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 13:17:35,711 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 256 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:35,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 264 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:17:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37777 states. [2022-02-15 13:17:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37777 to 28751. [2022-02-15 13:17:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28751 states, 28750 states have (on average 3.173495652173913) internal successors, (91238), 28750 states have internal predecessors, (91238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28751 states to 28751 states and 91238 transitions. [2022-02-15 13:17:36,630 INFO L78 Accepts]: Start accepts. Automaton has 28751 states and 91238 transitions. Word has length 26 [2022-02-15 13:17:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:36,630 INFO L470 AbstractCegarLoop]: Abstraction has 28751 states and 91238 transitions. [2022-02-15 13:17:36,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 28751 states and 91238 transitions. [2022-02-15 13:17:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:36,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:36,694 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:36,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Ended with exit code 0 [2022-02-15 13:17:36,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2022-02-15 13:17:36,895 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -11034809, now seen corresponding path program 511 times [2022-02-15 13:17:36,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:36,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382565137] [2022-02-15 13:17:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:36,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:36,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:36,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382565137] [2022-02-15 13:17:36,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382565137] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:36,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996351665] [2022-02-15 13:17:36,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:17:36,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:36,977 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:36,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-02-15 13:17:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:37,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:37,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996351665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:37,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:37,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:37,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351252663] [2022-02-15 13:17:37,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:37,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:37,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:37,163 INFO L87 Difference]: Start difference. First operand 28751 states and 91238 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-15 13:17:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:38,542 INFO L93 Difference]: Finished difference Result 33431 states and 104589 transitions. [2022-02-15 13:17:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 13:17:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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 26 [2022-02-15 13:17:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:38,656 INFO L225 Difference]: With dead ends: 33431 [2022-02-15 13:17:38,656 INFO L226 Difference]: Without dead ends: 33431 [2022-02-15 13:17:38,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 13:17:38,658 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 292 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:38,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 282 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:17:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2022-02-15 13:17:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 30211. [2022-02-15 13:17:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30211 states, 30210 states have (on average 3.1860973187686197) internal successors, (96252), 30210 states have internal predecessors, (96252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30211 states to 30211 states and 96252 transitions. [2022-02-15 13:17:39,513 INFO L78 Accepts]: Start accepts. Automaton has 30211 states and 96252 transitions. Word has length 26 [2022-02-15 13:17:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:39,513 INFO L470 AbstractCegarLoop]: Abstraction has 30211 states and 96252 transitions. [2022-02-15 13:17:39,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-15 13:17:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 30211 states and 96252 transitions. [2022-02-15 13:17:39,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:39,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:39,578 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:39,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Forceful destruction successful, exit code 0 [2022-02-15 13:17:39,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2022-02-15 13:17:39,778 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash -475625913, now seen corresponding path program 512 times [2022-02-15 13:17:39,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:39,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101070150] [2022-02-15 13:17:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:39,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:39,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:39,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101070150] [2022-02-15 13:17:39,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101070150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:39,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676154495] [2022-02-15 13:17:39,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:17:39,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:39,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:39,860 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:39,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-02-15 13:17:39,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:17:39,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:39,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:40,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:40,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676154495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:40,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:40,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:40,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811284064] [2022-02-15 13:17:40,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:40,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:40,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:40,042 INFO L87 Difference]: Start difference. First operand 30211 states and 96252 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:17:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:41,328 INFO L93 Difference]: Finished difference Result 32625 states and 102515 transitions. [2022-02-15 13:17:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-15 13:17:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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 26 [2022-02-15 13:17:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:41,438 INFO L225 Difference]: With dead ends: 32625 [2022-02-15 13:17:41,438 INFO L226 Difference]: Without dead ends: 32621 [2022-02-15 13:17:41,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4219, Invalid=7991, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 13:17:41,440 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:41,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 277 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:17:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32621 states. [2022-02-15 13:17:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32621 to 27450. [2022-02-15 13:17:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27450 states, 27449 states have (on average 3.1584757186054135) internal successors, (86697), 27449 states have internal predecessors, (86697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27450 states to 27450 states and 86697 transitions. [2022-02-15 13:17:42,200 INFO L78 Accepts]: Start accepts. Automaton has 27450 states and 86697 transitions. Word has length 26 [2022-02-15 13:17:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:42,200 INFO L470 AbstractCegarLoop]: Abstraction has 27450 states and 86697 transitions. [2022-02-15 13:17:42,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 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) [2022-02-15 13:17:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 27450 states and 86697 transitions. [2022-02-15 13:17:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:42,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:42,249 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:42,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Forceful destruction successful, exit code 0 [2022-02-15 13:17:42,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2022-02-15 13:17:42,449 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1839200757, now seen corresponding path program 513 times [2022-02-15 13:17:42,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:42,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286894354] [2022-02-15 13:17:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:42,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:42,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:42,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286894354] [2022-02-15 13:17:42,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286894354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:42,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399802083] [2022-02-15 13:17:42,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:17:42,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:42,530 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:42,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-02-15 13:17:42,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:17:42,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:42,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:42,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:42,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399802083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:42,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:42,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:42,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7399158] [2022-02-15 13:17:42,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:42,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:42,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:42,716 INFO L87 Difference]: Start difference. First operand 27450 states and 86697 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:43,722 INFO L93 Difference]: Finished difference Result 35448 states and 108975 transitions. [2022-02-15 13:17:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:17:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:43,838 INFO L225 Difference]: With dead ends: 35448 [2022-02-15 13:17:43,839 INFO L226 Difference]: Without dead ends: 35439 [2022-02-15 13:17:43,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1836, Invalid=6174, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:17:43,840 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 390 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:43,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 162 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:17:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35439 states. [2022-02-15 13:17:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35439 to 27796. [2022-02-15 13:17:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27796 states, 27795 states have (on average 3.1588774959525097) internal successors, (87801), 27795 states have internal predecessors, (87801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27796 states to 27796 states and 87801 transitions. [2022-02-15 13:17:44,767 INFO L78 Accepts]: Start accepts. Automaton has 27796 states and 87801 transitions. Word has length 26 [2022-02-15 13:17:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 27796 states and 87801 transitions. [2022-02-15 13:17:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 27796 states and 87801 transitions. [2022-02-15 13:17:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:44,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:44,826 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:44,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Forceful destruction successful, exit code 0 [2022-02-15 13:17:45,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable526 [2022-02-15 13:17:45,027 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1868021217, now seen corresponding path program 514 times [2022-02-15 13:17:45,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:45,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553841500] [2022-02-15 13:17:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:45,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:45,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:45,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553841500] [2022-02-15 13:17:45,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553841500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:45,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999697750] [2022-02-15 13:17:45,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:17:45,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:45,106 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:45,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-02-15 13:17:45,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:17:45,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:45,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:45,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:45,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:45,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999697750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:45,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:45,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:45,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113071141] [2022-02-15 13:17:45,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:45,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:45,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:45,291 INFO L87 Difference]: Start difference. First operand 27796 states and 87801 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:46,244 INFO L93 Difference]: Finished difference Result 35824 states and 110259 transitions. [2022-02-15 13:17:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 13:17:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:46,365 INFO L225 Difference]: With dead ends: 35824 [2022-02-15 13:17:46,365 INFO L226 Difference]: Without dead ends: 35812 [2022-02-15 13:17:46,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1573, Invalid=5567, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:17:46,366 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 333 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:46,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 187 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:17:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2022-02-15 13:17:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 28033. [2022-02-15 13:17:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28033 states, 28032 states have (on average 3.161208618721461) internal successors, (88615), 28032 states have internal predecessors, (88615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28033 states to 28033 states and 88615 transitions. [2022-02-15 13:17:47,317 INFO L78 Accepts]: Start accepts. Automaton has 28033 states and 88615 transitions. Word has length 26 [2022-02-15 13:17:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:47,317 INFO L470 AbstractCegarLoop]: Abstraction has 28033 states and 88615 transitions. [2022-02-15 13:17:47,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:47,317 INFO L276 IsEmpty]: Start isEmpty. Operand 28033 states and 88615 transitions. [2022-02-15 13:17:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:47,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:47,377 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:47,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Forceful destruction successful, exit code 0 [2022-02-15 13:17:47,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:47,578 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash 827785419, now seen corresponding path program 515 times [2022-02-15 13:17:47,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:47,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605371346] [2022-02-15 13:17:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:47,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:47,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:47,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605371346] [2022-02-15 13:17:47,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605371346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:47,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41322436] [2022-02-15 13:17:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:17:47,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:47,657 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:47,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-02-15 13:17:47,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:17:47,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:47,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:47,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:47,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:47,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41322436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:47,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:47,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:47,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166775334] [2022-02-15 13:17:47,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:47,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:47,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:47,841 INFO L87 Difference]: Start difference. First operand 28033 states and 88615 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:48,737 INFO L93 Difference]: Finished difference Result 36830 states and 113799 transitions. [2022-02-15 13:17:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:17:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:48,861 INFO L225 Difference]: With dead ends: 36830 [2022-02-15 13:17:48,861 INFO L226 Difference]: Without dead ends: 36815 [2022-02-15 13:17:48,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1351, Invalid=4969, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:17:48,862 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 250 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:48,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 199 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:17:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36815 states. [2022-02-15 13:17:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36815 to 28168. [2022-02-15 13:17:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28168 states, 28167 states have (on average 3.161856072709199) internal successors, (89060), 28167 states have internal predecessors, (89060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28168 states to 28168 states and 89060 transitions. [2022-02-15 13:17:49,947 INFO L78 Accepts]: Start accepts. Automaton has 28168 states and 89060 transitions. Word has length 26 [2022-02-15 13:17:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:49,947 INFO L470 AbstractCegarLoop]: Abstraction has 28168 states and 89060 transitions. [2022-02-15 13:17:49,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 28168 states and 89060 transitions. [2022-02-15 13:17:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:50,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:50,017 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:50,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Forceful destruction successful, exit code 0 [2022-02-15 13:17:50,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2022-02-15 13:17:50,217 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1354753247, now seen corresponding path program 516 times [2022-02-15 13:17:50,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:50,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927580843] [2022-02-15 13:17:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:50,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:50,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:50,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927580843] [2022-02-15 13:17:50,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927580843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:50,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989074299] [2022-02-15 13:17:50,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:17:50,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:50,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:50,301 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:50,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-02-15 13:17:50,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:17:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:50,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:50,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:50,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989074299] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:50,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:50,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:50,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784162861] [2022-02-15 13:17:50,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:50,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:50,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:50,497 INFO L87 Difference]: Start difference. First operand 28168 states and 89060 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:51,307 INFO L93 Difference]: Finished difference Result 38080 states and 118134 transitions. [2022-02-15 13:17:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:17:51,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:51,412 INFO L225 Difference]: With dead ends: 38080 [2022-02-15 13:17:51,412 INFO L226 Difference]: Without dead ends: 38062 [2022-02-15 13:17:51,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1171, Invalid=4379, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 13:17:51,413 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 263 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:51,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 160 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:17:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38062 states. [2022-02-15 13:17:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38062 to 28241. [2022-02-15 13:17:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28241 states, 28240 states have (on average 3.1613668555240793) internal successors, (89277), 28240 states have internal predecessors, (89277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28241 states to 28241 states and 89277 transitions. [2022-02-15 13:17:52,328 INFO L78 Accepts]: Start accepts. Automaton has 28241 states and 89277 transitions. Word has length 26 [2022-02-15 13:17:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:52,328 INFO L470 AbstractCegarLoop]: Abstraction has 28241 states and 89277 transitions. [2022-02-15 13:17:52,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 28241 states and 89277 transitions. [2022-02-15 13:17:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:52,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:52,378 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:52,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-02-15 13:17:52,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2022-02-15 13:17:52,579 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash -293975157, now seen corresponding path program 517 times [2022-02-15 13:17:52,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:52,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344432423] [2022-02-15 13:17:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:52,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:52,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:52,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344432423] [2022-02-15 13:17:52,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344432423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:52,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981511282] [2022-02-15 13:17:52,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:17:52,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:52,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:52,658 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:52,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-02-15 13:17:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:52,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:52,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981511282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:52,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:52,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:52,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071757003] [2022-02-15 13:17:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:52,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:52,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:52,839 INFO L87 Difference]: Start difference. First operand 28241 states and 89277 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:53,550 INFO L93 Difference]: Finished difference Result 38378 states and 118948 transitions. [2022-02-15 13:17:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:17:53,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:53,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:53,653 INFO L225 Difference]: With dead ends: 38378 [2022-02-15 13:17:53,653 INFO L226 Difference]: Without dead ends: 38357 [2022-02-15 13:17:53,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1034, Invalid=3796, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:17:53,654 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 218 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:53,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 168 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:17:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38357 states. [2022-02-15 13:17:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38357 to 28289. [2022-02-15 13:17:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.1601032239819005) internal successors, (89393), 28288 states have internal predecessors, (89393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89393 transitions. [2022-02-15 13:17:54,581 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89393 transitions. Word has length 26 [2022-02-15 13:17:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:54,581 INFO L470 AbstractCegarLoop]: Abstraction has 28289 states and 89393 transitions. [2022-02-15 13:17:54,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:54,581 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89393 transitions. [2022-02-15 13:17:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:54,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:54,631 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:54,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Ended with exit code 0 [2022-02-15 13:17:54,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-02-15 13:17:54,832 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1769592735, now seen corresponding path program 518 times [2022-02-15 13:17:54,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:54,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719661951] [2022-02-15 13:17:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:54,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:54,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:54,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719661951] [2022-02-15 13:17:54,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719661951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:54,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115216394] [2022-02-15 13:17:54,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:17:54,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:54,912 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:54,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-02-15 13:17:54,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:17:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:54,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:54,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:55,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:55,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115216394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:55,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:55,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:17:55,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027567375] [2022-02-15 13:17:55,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:55,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:55,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:55,097 INFO L87 Difference]: Start difference. First operand 28289 states and 89393 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:55,641 INFO L93 Difference]: Finished difference Result 35202 states and 108627 transitions. [2022-02-15 13:17:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:17:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:55,735 INFO L225 Difference]: With dead ends: 35202 [2022-02-15 13:17:55,735 INFO L226 Difference]: Without dead ends: 35181 [2022-02-15 13:17:55,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:17:55,736 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 188 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:55,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 167 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:17:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35181 states. [2022-02-15 13:17:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35181 to 28289. [2022-02-15 13:17:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28289 states, 28288 states have (on average 3.159855769230769) internal successors, (89386), 28288 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28289 states to 28289 states and 89386 transitions. [2022-02-15 13:17:56,650 INFO L78 Accepts]: Start accepts. Automaton has 28289 states and 89386 transitions. Word has length 26 [2022-02-15 13:17:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:56,650 INFO L470 AbstractCegarLoop]: Abstraction has 28289 states and 89386 transitions. [2022-02-15 13:17:56,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28289 states and 89386 transitions. [2022-02-15 13:17:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:56,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:56,705 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:56,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Ended with exit code 0 [2022-02-15 13:17:56,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2022-02-15 13:17:56,906 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1834397045, now seen corresponding path program 519 times [2022-02-15 13:17:56,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:56,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148210096] [2022-02-15 13:17:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:56,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:56,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:56,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148210096] [2022-02-15 13:17:56,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148210096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:56,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656311840] [2022-02-15 13:17:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:17:56,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:56,983 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:56,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-02-15 13:17:57,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-15 13:17:57,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:57,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:57,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656311840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:57,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:57,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 25 [2022-02-15 13:17:57,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239453248] [2022-02-15 13:17:57,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:57,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:57,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:57,180 INFO L87 Difference]: Start difference. First operand 28289 states and 89386 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:17:58,520 INFO L93 Difference]: Finished difference Result 31417 states and 97881 transitions. [2022-02-15 13:17:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-15 13:17:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:17:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:17:58,596 INFO L225 Difference]: With dead ends: 31417 [2022-02-15 13:17:58,597 INFO L226 Difference]: Without dead ends: 31402 [2022-02-15 13:17:58,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3387, Invalid=6315, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 13:17:58,598 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 265 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:17:58,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 309 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:17:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31402 states. [2022-02-15 13:17:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31402 to 29607. [2022-02-15 13:17:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29607 states, 29606 states have (on average 3.1732419104235627) internal successors, (93947), 29606 states have internal predecessors, (93947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29607 states to 29607 states and 93947 transitions. [2022-02-15 13:17:59,355 INFO L78 Accepts]: Start accepts. Automaton has 29607 states and 93947 transitions. Word has length 26 [2022-02-15 13:17:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:17:59,355 INFO L470 AbstractCegarLoop]: Abstraction has 29607 states and 93947 transitions. [2022-02-15 13:17:59,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:17:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 29607 states and 93947 transitions. [2022-02-15 13:17:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:17:59,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:17:59,404 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:17:59,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Ended with exit code 0 [2022-02-15 13:17:59,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-02-15 13:17:59,604 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:17:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:17:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1995979147, now seen corresponding path program 520 times [2022-02-15 13:17:59,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:17:59,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775253526] [2022-02-15 13:17:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:17:59,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:17:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:17:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:17:59,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:17:59,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775253526] [2022-02-15 13:17:59,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775253526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:17:59,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28184034] [2022-02-15 13:17:59,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:17:59,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:17:59,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:17:59,677 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:17:59,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-02-15 13:17:59,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:17:59,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:17:59,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:17:59,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:17:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:17:59,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:17:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:17:59,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28184034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:17:59,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:17:59,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 25 [2022-02-15 13:17:59,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309523415] [2022-02-15 13:17:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:17:59,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:17:59,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:17:59,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:17:59,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:17:59,858 INFO L87 Difference]: Start difference. First operand 29607 states and 93947 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:18:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:01,191 INFO L93 Difference]: Finished difference Result 30731 states and 96043 transitions. [2022-02-15 13:18:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-15 13:18:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 26 [2022-02-15 13:18:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:01,436 INFO L225 Difference]: With dead ends: 30731 [2022-02-15 13:18:01,436 INFO L226 Difference]: Without dead ends: 30719 [2022-02-15 13:18:01,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4100, Invalid=8332, Unknown=0, NotChecked=0, Total=12432 [2022-02-15 13:18:01,437 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 250 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:01,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 293 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30719 states. [2022-02-15 13:18:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30719 to 27213. [2022-02-15 13:18:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27213 states, 27212 states have (on average 3.1501543436719093) internal successors, (85722), 27212 states have internal predecessors, (85722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27213 states to 27213 states and 85722 transitions. [2022-02-15 13:18:02,282 INFO L78 Accepts]: Start accepts. Automaton has 27213 states and 85722 transitions. Word has length 26 [2022-02-15 13:18:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:02,282 INFO L470 AbstractCegarLoop]: Abstraction has 27213 states and 85722 transitions. [2022-02-15 13:18:02,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2022-02-15 13:18:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 27213 states and 85722 transitions. [2022-02-15 13:18:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:02,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:02,339 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:02,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Ended with exit code 0 [2022-02-15 13:18:02,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2022-02-15 13:18:02,539 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1962379919, now seen corresponding path program 521 times [2022-02-15 13:18:02,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:02,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352845671] [2022-02-15 13:18:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:02,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:02,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:02,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352845671] [2022-02-15 13:18:02,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352845671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:02,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336464398] [2022-02-15 13:18:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:18:02,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:02,620 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:02,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-02-15 13:18:02,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:18:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:02,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:02,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336464398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:02,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:02,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-02-15 13:18:02,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947096114] [2022-02-15 13:18:02,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:02,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:18:02,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:18:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:18:02,812 INFO L87 Difference]: Start difference. First operand 27213 states and 85722 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:18:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:04,137 INFO L93 Difference]: Finished difference Result 28228 states and 87728 transitions. [2022-02-15 13:18:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-15 13:18:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 26 [2022-02-15 13:18:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:04,227 INFO L225 Difference]: With dead ends: 28228 [2022-02-15 13:18:04,227 INFO L226 Difference]: Without dead ends: 28220 [2022-02-15 13:18:04,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4157, Invalid=8499, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 13:18:04,228 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 201 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:04,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 242 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28220 states. [2022-02-15 13:18:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28220 to 27255. [2022-02-15 13:18:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27255 states, 27254 states have (on average 3.149262493578924) internal successors, (85830), 27254 states have internal predecessors, (85830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27255 states to 27255 states and 85830 transitions. [2022-02-15 13:18:04,961 INFO L78 Accepts]: Start accepts. Automaton has 27255 states and 85830 transitions. Word has length 26 [2022-02-15 13:18:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:04,962 INFO L470 AbstractCegarLoop]: Abstraction has 27255 states and 85830 transitions. [2022-02-15 13:18:04,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2022-02-15 13:18:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 27255 states and 85830 transitions. [2022-02-15 13:18:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:05,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:05,009 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:05,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Ended with exit code 0 [2022-02-15 13:18:05,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2022-02-15 13:18:05,210 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1770915783, now seen corresponding path program 522 times [2022-02-15 13:18:05,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:05,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366215285] [2022-02-15 13:18:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:05,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:05,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:05,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366215285] [2022-02-15 13:18:05,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366215285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:05,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728557113] [2022-02-15 13:18:05,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:18:05,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:05,278 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:05,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-02-15 13:18:05,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-15 13:18:05,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:05,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:05,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728557113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:05,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:05,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 25 [2022-02-15 13:18:05,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073188178] [2022-02-15 13:18:05,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:05,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:05,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:05,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:05,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:05,469 INFO L87 Difference]: Start difference. First operand 27255 states and 85830 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:06,763 INFO L93 Difference]: Finished difference Result 30687 states and 95027 transitions. [2022-02-15 13:18:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:18:06,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:06,862 INFO L225 Difference]: With dead ends: 30687 [2022-02-15 13:18:06,863 INFO L226 Difference]: Without dead ends: 30660 [2022-02-15 13:18:06,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3241, Invalid=6071, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 13:18:06,863 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 310 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:06,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 287 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30660 states. [2022-02-15 13:18:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30660 to 28569. [2022-02-15 13:18:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28569 states, 28568 states have (on average 3.1633646037524503) internal successors, (90371), 28568 states have internal predecessors, (90371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28569 states to 28569 states and 90371 transitions. [2022-02-15 13:18:07,694 INFO L78 Accepts]: Start accepts. Automaton has 28569 states and 90371 transitions. Word has length 26 [2022-02-15 13:18:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:07,694 INFO L470 AbstractCegarLoop]: Abstraction has 28569 states and 90371 transitions. [2022-02-15 13:18:07,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 28569 states and 90371 transitions. [2022-02-15 13:18:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:07,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:07,755 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:07,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Ended with exit code 0 [2022-02-15 13:18:07,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:07,956 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1306324679, now seen corresponding path program 523 times [2022-02-15 13:18:07,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:07,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290060675] [2022-02-15 13:18:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:07,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:08,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:08,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290060675] [2022-02-15 13:18:08,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290060675] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:08,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021365994] [2022-02-15 13:18:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:18:08,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:08,025 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:08,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-02-15 13:18:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:08,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:08,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:08,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021365994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:08,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:08,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 25 [2022-02-15 13:18:08,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060797825] [2022-02-15 13:18:08,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:08,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:08,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:08,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:08,219 INFO L87 Difference]: Start difference. First operand 28569 states and 90371 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-15 13:18:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:09,871 INFO L93 Difference]: Finished difference Result 29868 states and 92929 transitions. [2022-02-15 13:18:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 13:18:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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 26 [2022-02-15 13:18:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:09,978 INFO L225 Difference]: With dead ends: 29868 [2022-02-15 13:18:09,979 INFO L226 Difference]: Without dead ends: 29858 [2022-02-15 13:18:09,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3726 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4143, Invalid=8967, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 13:18:09,979 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 280 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:09,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 272 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29858 states. [2022-02-15 13:18:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29858 to 26993. [2022-02-15 13:18:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26993 states, 26992 states have (on average 3.147191760521636) internal successors, (84949), 26992 states have internal predecessors, (84949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 84949 transitions. [2022-02-15 13:18:10,781 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 84949 transitions. Word has length 26 [2022-02-15 13:18:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:10,781 INFO L470 AbstractCegarLoop]: Abstraction has 26993 states and 84949 transitions. [2022-02-15 13:18:10,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2022-02-15 13:18:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 84949 transitions. [2022-02-15 13:18:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:10,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:10,839 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:10,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Ended with exit code 0 [2022-02-15 13:18:11,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:11,040 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1272725451, now seen corresponding path program 524 times [2022-02-15 13:18:11,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:11,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17133280] [2022-02-15 13:18:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:11,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:11,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:11,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17133280] [2022-02-15 13:18:11,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17133280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:11,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690755474] [2022-02-15 13:18:11,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:18:11,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:11,115 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:11,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-02-15 13:18:11,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:18:11,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:11,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:11,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690755474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:11,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:11,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 26 [2022-02-15 13:18:11,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471081674] [2022-02-15 13:18:11,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:11,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:18:11,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:18:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:18:11,312 INFO L87 Difference]: Start difference. First operand 26993 states and 84949 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-15 13:18:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:12,784 INFO L93 Difference]: Finished difference Result 28470 states and 88158 transitions. [2022-02-15 13:18:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-15 13:18:12,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 26 [2022-02-15 13:18:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:12,964 INFO L225 Difference]: With dead ends: 28470 [2022-02-15 13:18:12,964 INFO L226 Difference]: Without dead ends: 28450 [2022-02-15 13:18:12,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3803 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4019, Invalid=8863, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 13:18:12,965 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 242 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:12,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 356 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28450 states. [2022-02-15 13:18:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28450 to 26539. [2022-02-15 13:18:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26539 states, 26538 states have (on average 3.1459416685507575) internal successors, (83487), 26538 states have internal predecessors, (83487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26539 states to 26539 states and 83487 transitions. [2022-02-15 13:18:13,694 INFO L78 Accepts]: Start accepts. Automaton has 26539 states and 83487 transitions. Word has length 26 [2022-02-15 13:18:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:13,694 INFO L470 AbstractCegarLoop]: Abstraction has 26539 states and 83487 transitions. [2022-02-15 13:18:13,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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) [2022-02-15 13:18:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 26539 states and 83487 transitions. [2022-02-15 13:18:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:13,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:13,748 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:13,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-02-15 13:18:13,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:13,948 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash 231149383, now seen corresponding path program 525 times [2022-02-15 13:18:13,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:13,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126222264] [2022-02-15 13:18:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:13,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:14,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:14,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126222264] [2022-02-15 13:18:14,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126222264] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:14,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869566021] [2022-02-15 13:18:14,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:18:14,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:14,030 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:14,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-02-15 13:18:14,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-15 13:18:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:14,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:14,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869566021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:14,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:14,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2022-02-15 13:18:14,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555118374] [2022-02-15 13:18:14,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:18:14,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:18:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:18:14,234 INFO L87 Difference]: Start difference. First operand 26539 states and 83487 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-15 13:18:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:15,550 INFO L93 Difference]: Finished difference Result 27713 states and 85920 transitions. [2022-02-15 13:18:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 13:18:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 26 [2022-02-15 13:18:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:15,645 INFO L225 Difference]: With dead ends: 27713 [2022-02-15 13:18:15,645 INFO L226 Difference]: Without dead ends: 27701 [2022-02-15 13:18:15,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=4022, Invalid=8860, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 13:18:15,646 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 193 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:15,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 259 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27701 states. [2022-02-15 13:18:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27701 to 26577. [2022-02-15 13:18:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26577 states, 26576 states have (on average 3.145996387718242) internal successors, (83608), 26576 states have internal predecessors, (83608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26577 states to 26577 states and 83608 transitions. [2022-02-15 13:18:16,490 INFO L78 Accepts]: Start accepts. Automaton has 26577 states and 83608 transitions. Word has length 26 [2022-02-15 13:18:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:16,490 INFO L470 AbstractCegarLoop]: Abstraction has 26577 states and 83608 transitions. [2022-02-15 13:18:16,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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) [2022-02-15 13:18:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26577 states and 83608 transitions. [2022-02-15 13:18:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:16,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:16,548 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:16,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Ended with exit code 0 [2022-02-15 13:18:16,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:16,748 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1866463755, now seen corresponding path program 526 times [2022-02-15 13:18:16,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:16,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202834961] [2022-02-15 13:18:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:16,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:16,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:16,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202834961] [2022-02-15 13:18:16,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202834961] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:16,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961653962] [2022-02-15 13:18:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:18:16,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:16,816 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:16,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-02-15 13:18:16,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:18:16,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:16,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:16,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:17,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961653962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:17,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:17,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 25 [2022-02-15 13:18:17,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252172304] [2022-02-15 13:18:17,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:17,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:17,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:17,024 INFO L87 Difference]: Start difference. First operand 26577 states and 83608 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-02-15 13:18:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:18,306 INFO L93 Difference]: Finished difference Result 30369 states and 93818 transitions. [2022-02-15 13:18:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-15 13:18:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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 26 [2022-02-15 13:18:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:18,404 INFO L225 Difference]: With dead ends: 30369 [2022-02-15 13:18:18,404 INFO L226 Difference]: Without dead ends: 30345 [2022-02-15 13:18:18,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3114, Invalid=5816, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 13:18:18,404 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 326 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:18,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 239 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30345 states. [2022-02-15 13:18:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30345 to 27835. [2022-02-15 13:18:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27835 states, 27834 states have (on average 3.158906373500036) internal successors, (87925), 27834 states have internal predecessors, (87925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27835 states to 27835 states and 87925 transitions. [2022-02-15 13:18:19,140 INFO L78 Accepts]: Start accepts. Automaton has 27835 states and 87925 transitions. Word has length 26 [2022-02-15 13:18:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:19,140 INFO L470 AbstractCegarLoop]: Abstraction has 27835 states and 87925 transitions. [2022-02-15 13:18:19,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-02-15 13:18:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 27835 states and 87925 transitions. [2022-02-15 13:18:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:19,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:19,200 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:19,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Ended with exit code 0 [2022-02-15 13:18:19,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2022-02-15 13:18:19,401 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1401872651, now seen corresponding path program 527 times [2022-02-15 13:18:19,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:19,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163106028] [2022-02-15 13:18:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:19,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:19,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:19,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163106028] [2022-02-15 13:18:19,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163106028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:19,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876666374] [2022-02-15 13:18:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:18:19,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:19,464 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:19,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-02-15 13:18:19,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-15 13:18:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:19,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:19,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876666374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:19,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:19,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 25 [2022-02-15 13:18:19,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944331934] [2022-02-15 13:18:19,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:19,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:19,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:19,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:19,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:19,664 INFO L87 Difference]: Start difference. First operand 27835 states and 87925 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:21,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:21,179 INFO L93 Difference]: Finished difference Result 29357 states and 91107 transitions. [2022-02-15 13:18:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 13:18:21,180 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:21,274 INFO L225 Difference]: With dead ends: 29357 [2022-02-15 13:18:21,274 INFO L226 Difference]: Without dead ends: 29349 [2022-02-15 13:18:21,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4352, Invalid=9928, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 13:18:21,276 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 305 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:21,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 272 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:18:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29349 states. [2022-02-15 13:18:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29349 to 26847. [2022-02-15 13:18:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26847 states, 26846 states have (on average 3.1492959845042092) internal successors, (84546), 26846 states have internal predecessors, (84546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26847 states to 26847 states and 84546 transitions. [2022-02-15 13:18:22,035 INFO L78 Accepts]: Start accepts. Automaton has 26847 states and 84546 transitions. Word has length 26 [2022-02-15 13:18:22,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:22,035 INFO L470 AbstractCegarLoop]: Abstraction has 26847 states and 84546 transitions. [2022-02-15 13:18:22,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 26847 states and 84546 transitions. [2022-02-15 13:18:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:22,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:22,195 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:22,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Forceful destruction successful, exit code 0 [2022-02-15 13:18:22,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2022-02-15 13:18:22,395 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1368273423, now seen corresponding path program 528 times [2022-02-15 13:18:22,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:22,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270742558] [2022-02-15 13:18:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:22,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:22,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:22,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270742558] [2022-02-15 13:18:22,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270742558] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:22,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284382541] [2022-02-15 13:18:22,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:18:22,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:22,465 INFO L229 MonitoredProcess]: Starting monitored process 532 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:22,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-02-15 13:18:22,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-15 13:18:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:22,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:22,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:22,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284382541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:22,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:22,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 26 [2022-02-15 13:18:22,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157000277] [2022-02-15 13:18:22,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:22,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:18:22,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:18:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:18:22,672 INFO L87 Difference]: Start difference. First operand 26847 states and 84546 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:24,074 INFO L93 Difference]: Finished difference Result 28643 states and 88679 transitions. [2022-02-15 13:18:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 13:18:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:24,153 INFO L225 Difference]: With dead ends: 28643 [2022-02-15 13:18:24,153 INFO L226 Difference]: Without dead ends: 28631 [2022-02-15 13:18:24,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4043, Invalid=9529, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 13:18:24,155 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 278 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:24,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 258 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28631 states. [2022-02-15 13:18:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28631 to 26673. [2022-02-15 13:18:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26673 states, 26672 states have (on average 3.1486577684463106) internal successors, (83981), 26672 states have internal predecessors, (83981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26673 states to 26673 states and 83981 transitions. [2022-02-15 13:18:24,808 INFO L78 Accepts]: Start accepts. Automaton has 26673 states and 83981 transitions. Word has length 26 [2022-02-15 13:18:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:24,808 INFO L470 AbstractCegarLoop]: Abstraction has 26673 states and 83981 transitions. [2022-02-15 13:18:24,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26673 states and 83981 transitions. [2022-02-15 13:18:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:24,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:24,934 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:24,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Ended with exit code 0 [2022-02-15 13:18:25,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,532 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:25,134 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 326697355, now seen corresponding path program 529 times [2022-02-15 13:18:25,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:25,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115995992] [2022-02-15 13:18:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:25,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:25,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:25,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115995992] [2022-02-15 13:18:25,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115995992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:25,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780855870] [2022-02-15 13:18:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:18:25,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:25,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:25,208 INFO L229 MonitoredProcess]: Starting monitored process 533 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:25,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-02-15 13:18:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:25,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:25,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:25,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780855870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:25,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:25,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 27 [2022-02-15 13:18:25,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315046280] [2022-02-15 13:18:25,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:25,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:18:25,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:18:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:18:25,408 INFO L87 Difference]: Start difference. First operand 26673 states and 83981 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:26,674 INFO L93 Difference]: Finished difference Result 28561 states and 88437 transitions. [2022-02-15 13:18:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-15 13:18:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:26,746 INFO L225 Difference]: With dead ends: 28561 [2022-02-15 13:18:26,746 INFO L226 Difference]: Without dead ends: 28537 [2022-02-15 13:18:26,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3869, Invalid=9241, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 13:18:26,748 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 267 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:26,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 256 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:18:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28537 states. [2022-02-15 13:18:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28537 to 26427. [2022-02-15 13:18:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26427 states, 26426 states have (on average 3.1503821993491257) internal successors, (83252), 26426 states have internal predecessors, (83252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26427 states to 26427 states and 83252 transitions. [2022-02-15 13:18:27,407 INFO L78 Accepts]: Start accepts. Automaton has 26427 states and 83252 transitions. Word has length 26 [2022-02-15 13:18:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:27,407 INFO L470 AbstractCegarLoop]: Abstraction has 26427 states and 83252 transitions. [2022-02-15 13:18:27,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 26427 states and 83252 transitions. [2022-02-15 13:18:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:27,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:27,454 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:27,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Ended with exit code 0 [2022-02-15 13:18:27,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2022-02-15 13:18:27,654 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1897389681, now seen corresponding path program 530 times [2022-02-15 13:18:27,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:27,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323532454] [2022-02-15 13:18:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:27,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:27,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:27,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323532454] [2022-02-15 13:18:27,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323532454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:27,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260260412] [2022-02-15 13:18:27,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:18:27,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:27,734 INFO L229 MonitoredProcess]: Starting monitored process 534 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:27,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-02-15 13:18:27,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:18:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:27,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:27,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260260412] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:27,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:27,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-02-15 13:18:27,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443915898] [2022-02-15 13:18:27,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:27,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:18:27,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:18:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:18:27,943 INFO L87 Difference]: Start difference. First operand 26427 states and 83252 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:29,136 INFO L93 Difference]: Finished difference Result 27859 states and 86438 transitions. [2022-02-15 13:18:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 13:18:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:29,198 INFO L225 Difference]: With dead ends: 27859 [2022-02-15 13:18:29,198 INFO L226 Difference]: Without dead ends: 27843 [2022-02-15 13:18:29,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4055 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3820, Invalid=9062, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 13:18:29,199 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 205 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:29,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 187 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:18:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27843 states. [2022-02-15 13:18:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27843 to 26477. [2022-02-15 13:18:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26477 states, 26476 states have (on average 3.1508536032633327) internal successors, (83422), 26476 states have internal predecessors, (83422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26477 states to 26477 states and 83422 transitions. [2022-02-15 13:18:29,881 INFO L78 Accepts]: Start accepts. Automaton has 26477 states and 83422 transitions. Word has length 26 [2022-02-15 13:18:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:29,881 INFO L470 AbstractCegarLoop]: Abstraction has 26477 states and 83422 transitions. [2022-02-15 13:18:29,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26477 states and 83422 transitions. [2022-02-15 13:18:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:29,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:29,928 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:29,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Ended with exit code 0 [2022-02-15 13:18:30,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2022-02-15 13:18:30,128 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:30,128 INFO L85 PathProgramCache]: Analyzing trace with hash 533483591, now seen corresponding path program 531 times [2022-02-15 13:18:30,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:30,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525777851] [2022-02-15 13:18:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:30,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:30,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:30,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525777851] [2022-02-15 13:18:30,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525777851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:30,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12556532] [2022-02-15 13:18:30,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:18:30,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:30,187 INFO L229 MonitoredProcess]: Starting monitored process 535 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:30,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-02-15 13:18:30,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-15 13:18:30,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:30,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:30,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12556532] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:30,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:30,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 25 [2022-02-15 13:18:30,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725086093] [2022-02-15 13:18:30,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:30,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:30,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:30,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:30,390 INFO L87 Difference]: Start difference. First operand 26477 states and 83422 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2022-02-15 13:18:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:31,532 INFO L93 Difference]: Finished difference Result 30895 states and 95482 transitions. [2022-02-15 13:18:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 13:18:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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 26 [2022-02-15 13:18:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:31,609 INFO L225 Difference]: With dead ends: 30895 [2022-02-15 13:18:31,610 INFO L226 Difference]: Without dead ends: 30874 [2022-02-15 13:18:31,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2988, Invalid=5568, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:18:31,611 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 325 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:31,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 268 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30874 states. [2022-02-15 13:18:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30874 to 27557. [2022-02-15 13:18:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27557 states, 27556 states have (on average 3.16014661053854) internal successors, (87081), 27556 states have internal predecessors, (87081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27557 states to 27557 states and 87081 transitions. [2022-02-15 13:18:32,347 INFO L78 Accepts]: Start accepts. Automaton has 27557 states and 87081 transitions. Word has length 26 [2022-02-15 13:18:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:32,347 INFO L470 AbstractCegarLoop]: Abstraction has 27557 states and 87081 transitions. [2022-02-15 13:18:32,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2022-02-15 13:18:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 27557 states and 87081 transitions. [2022-02-15 13:18:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:32,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:32,398 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:32,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Forceful destruction successful, exit code 0 [2022-02-15 13:18:32,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,535 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:32,598 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:32,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:32,599 INFO L85 PathProgramCache]: Analyzing trace with hash 68892487, now seen corresponding path program 532 times [2022-02-15 13:18:32,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:32,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628614783] [2022-02-15 13:18:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:32,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:32,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:32,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628614783] [2022-02-15 13:18:32,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628614783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:32,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939404654] [2022-02-15 13:18:32,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:18:32,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:32,656 INFO L229 MonitoredProcess]: Starting monitored process 536 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:32,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-02-15 13:18:32,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:18:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:32,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:32,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939404654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:32,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:32,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 25 [2022-02-15 13:18:32,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651728299] [2022-02-15 13:18:32,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:32,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:32,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:32,855 INFO L87 Difference]: Start difference. First operand 27557 states and 87081 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:34,401 INFO L93 Difference]: Finished difference Result 29430 states and 91212 transitions. [2022-02-15 13:18:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-15 13:18:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:34,472 INFO L225 Difference]: With dead ends: 29430 [2022-02-15 13:18:34,472 INFO L226 Difference]: Without dead ends: 29424 [2022-02-15 13:18:34,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4713, Invalid=11289, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 13:18:34,474 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 307 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:34,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 261 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29424 states. [2022-02-15 13:18:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29424 to 27158. [2022-02-15 13:18:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27158 states, 27157 states have (on average 3.156165997716979) internal successors, (85712), 27157 states have internal predecessors, (85712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27158 states to 27158 states and 85712 transitions. [2022-02-15 13:18:35,201 INFO L78 Accepts]: Start accepts. Automaton has 27158 states and 85712 transitions. Word has length 26 [2022-02-15 13:18:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:35,201 INFO L470 AbstractCegarLoop]: Abstraction has 27158 states and 85712 transitions. [2022-02-15 13:18:35,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27158 states and 85712 transitions. [2022-02-15 13:18:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:35,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:35,247 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:35,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Ended with exit code 0 [2022-02-15 13:18:35,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545,536 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:35,448 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash 35293259, now seen corresponding path program 533 times [2022-02-15 13:18:35,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:35,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186183611] [2022-02-15 13:18:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:35,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:35,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:35,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186183611] [2022-02-15 13:18:35,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186183611] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:35,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351320824] [2022-02-15 13:18:35,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:18:35,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:35,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:35,526 INFO L229 MonitoredProcess]: Starting monitored process 537 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:35,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-02-15 13:18:35,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:18:35,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:35,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:35,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351320824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:35,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:35,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 26 [2022-02-15 13:18:35,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058054470] [2022-02-15 13:18:35,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:35,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:18:35,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:18:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:18:35,751 INFO L87 Difference]: Start difference. First operand 27158 states and 85712 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:37,188 INFO L93 Difference]: Finished difference Result 29381 states and 91072 transitions. [2022-02-15 13:18:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 13:18:37,188 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:37,284 INFO L225 Difference]: With dead ends: 29381 [2022-02-15 13:18:37,284 INFO L226 Difference]: Without dead ends: 29371 [2022-02-15 13:18:37,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4736 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4224, Invalid=10538, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 13:18:37,287 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 303 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:37,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 261 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29371 states. [2022-02-15 13:18:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29371 to 27039. [2022-02-15 13:18:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27039 states, 27038 states have (on average 3.1556328130778906) internal successors, (85322), 27038 states have internal predecessors, (85322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27039 states to 27039 states and 85322 transitions. [2022-02-15 13:18:38,128 INFO L78 Accepts]: Start accepts. Automaton has 27039 states and 85322 transitions. Word has length 26 [2022-02-15 13:18:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:38,128 INFO L470 AbstractCegarLoop]: Abstraction has 27039 states and 85322 transitions. [2022-02-15 13:18:38,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 27039 states and 85322 transitions. [2022-02-15 13:18:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:38,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:38,184 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:38,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Ended with exit code 0 [2022-02-15 13:18:38,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2022-02-15 13:18:38,384 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1006282809, now seen corresponding path program 534 times [2022-02-15 13:18:38,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:38,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22439720] [2022-02-15 13:18:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:38,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:38,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:38,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22439720] [2022-02-15 13:18:38,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22439720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:38,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821245027] [2022-02-15 13:18:38,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:18:38,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:38,452 INFO L229 MonitoredProcess]: Starting monitored process 538 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:38,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-02-15 13:18:38,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:18:38,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:38,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:38,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:38,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821245027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:38,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:38,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 27 [2022-02-15 13:18:38,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281182981] [2022-02-15 13:18:38,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:38,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:18:38,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:18:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:18:38,657 INFO L87 Difference]: Start difference. First operand 27039 states and 85322 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:40,026 INFO L93 Difference]: Finished difference Result 29421 states and 91215 transitions. [2022-02-15 13:18:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-15 13:18:40,026 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:40,091 INFO L225 Difference]: With dead ends: 29421 [2022-02-15 13:18:40,091 INFO L226 Difference]: Without dead ends: 29407 [2022-02-15 13:18:40,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3872, Invalid=9934, Unknown=0, NotChecked=0, Total=13806 [2022-02-15 13:18:40,092 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 333 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:40,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 221 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:18:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29407 states. [2022-02-15 13:18:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29407 to 27188. [2022-02-15 13:18:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27188 states, 27187 states have (on average 3.1570235774451025) internal successors, (85830), 27187 states have internal predecessors, (85830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27188 states to 27188 states and 85830 transitions. [2022-02-15 13:18:40,710 INFO L78 Accepts]: Start accepts. Automaton has 27188 states and 85830 transitions. Word has length 26 [2022-02-15 13:18:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:40,711 INFO L470 AbstractCegarLoop]: Abstraction has 27188 states and 85830 transitions. [2022-02-15 13:18:40,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 27188 states and 85830 transitions. [2022-02-15 13:18:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:40,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:40,825 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:40,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Ended with exit code 0 [2022-02-15 13:18:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2022-02-15 13:18:41,026 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1064597451, now seen corresponding path program 535 times [2022-02-15 13:18:41,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:41,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534486830] [2022-02-15 13:18:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:41,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:41,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:41,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534486830] [2022-02-15 13:18:41,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534486830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:41,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624946515] [2022-02-15 13:18:41,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:18:41,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:41,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:41,100 INFO L229 MonitoredProcess]: Starting monitored process 539 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-02-15 13:18:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:41,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:41,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:41,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624946515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:41,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:41,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 28 [2022-02-15 13:18:41,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981345640] [2022-02-15 13:18:41,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:41,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:18:41,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:18:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:18:41,309 INFO L87 Difference]: Start difference. First operand 27188 states and 85830 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:42,629 INFO L93 Difference]: Finished difference Result 29725 states and 92236 transitions. [2022-02-15 13:18:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-15 13:18:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:42,728 INFO L225 Difference]: With dead ends: 29725 [2022-02-15 13:18:42,728 INFO L226 Difference]: Without dead ends: 29701 [2022-02-15 13:18:42,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3652, Invalid=9458, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 13:18:42,730 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 248 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:42,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 315 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29701 states. [2022-02-15 13:18:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29701 to 27357. [2022-02-15 13:18:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27357 states, 27356 states have (on average 3.1610615587074133) internal successors, (86474), 27356 states have internal predecessors, (86474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27357 states to 27357 states and 86474 transitions. [2022-02-15 13:18:43,524 INFO L78 Accepts]: Start accepts. Automaton has 27357 states and 86474 transitions. Word has length 26 [2022-02-15 13:18:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:43,524 INFO L470 AbstractCegarLoop]: Abstraction has 27357 states and 86474 transitions. [2022-02-15 13:18:43,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 27357 states and 86474 transitions. [2022-02-15 13:18:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:43,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:43,583 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:43,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Ended with exit code 0 [2022-02-15 13:18:43,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2022-02-15 13:18:43,783 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 837376071, now seen corresponding path program 536 times [2022-02-15 13:18:43,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:43,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588734371] [2022-02-15 13:18:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:43,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:43,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:43,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588734371] [2022-02-15 13:18:43,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588734371] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:43,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110832139] [2022-02-15 13:18:43,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:18:43,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:43,866 INFO L229 MonitoredProcess]: Starting monitored process 540 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:43,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-02-15 13:18:43,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:18:43,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:44,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:44,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110832139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:44,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:44,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-15 13:18:44,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297359542] [2022-02-15 13:18:44,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:44,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:18:44,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:18:44,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:18:44,092 INFO L87 Difference]: Start difference. First operand 27357 states and 86474 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:45,266 INFO L93 Difference]: Finished difference Result 29174 states and 90761 transitions. [2022-02-15 13:18:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 13:18:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:45,363 INFO L225 Difference]: With dead ends: 29174 [2022-02-15 13:18:45,363 INFO L226 Difference]: Without dead ends: 29154 [2022-02-15 13:18:45,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4083 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3559, Invalid=9097, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 13:18:45,365 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 234 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:45,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 205 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:18:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29154 states. [2022-02-15 13:18:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29154 to 27401. [2022-02-15 13:18:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27401 states, 27400 states have (on average 3.1614963503649633) internal successors, (86625), 27400 states have internal predecessors, (86625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27401 states to 27401 states and 86625 transitions. [2022-02-15 13:18:46,194 INFO L78 Accepts]: Start accepts. Automaton has 27401 states and 86625 transitions. Word has length 26 [2022-02-15 13:18:46,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:46,194 INFO L470 AbstractCegarLoop]: Abstraction has 27401 states and 86625 transitions. [2022-02-15 13:18:46,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 27401 states and 86625 transitions. [2022-02-15 13:18:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:46,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:46,255 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:46,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Ended with exit code 0 [2022-02-15 13:18:46,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,540 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:46,455 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2134195829, now seen corresponding path program 537 times [2022-02-15 13:18:46,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:46,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106784855] [2022-02-15 13:18:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:46,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:46,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:46,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106784855] [2022-02-15 13:18:46,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106784855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:46,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470615029] [2022-02-15 13:18:46,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:18:46,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:46,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:46,510 INFO L229 MonitoredProcess]: Starting monitored process 541 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:46,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-02-15 13:18:46,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:18:46,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:46,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:46,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470615029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:46,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:46,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 12] total 25 [2022-02-15 13:18:46,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013788984] [2022-02-15 13:18:46,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:46,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:46,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:46,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:46,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:46,725 INFO L87 Difference]: Start difference. First operand 27401 states and 86625 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:47,891 INFO L93 Difference]: Finished difference Result 33346 states and 103495 transitions. [2022-02-15 13:18:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 13:18:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:18:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:48,003 INFO L225 Difference]: With dead ends: 33346 [2022-02-15 13:18:48,003 INFO L226 Difference]: Without dead ends: 33328 [2022-02-15 13:18:48,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2839, Invalid=5351, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:18:48,004 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 383 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:48,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 234 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33328 states. [2022-02-15 13:18:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33328 to 30042. [2022-02-15 13:18:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30042 states, 30041 states have (on average 3.181385439898805) internal successors, (95572), 30041 states have internal predecessors, (95572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30042 states to 30042 states and 95572 transitions. [2022-02-15 13:18:49,007 INFO L78 Accepts]: Start accepts. Automaton has 30042 states and 95572 transitions. Word has length 26 [2022-02-15 13:18:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:49,007 INFO L470 AbstractCegarLoop]: Abstraction has 30042 states and 95572 transitions. [2022-02-15 13:18:49,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 30042 states and 95572 transitions. [2022-02-15 13:18:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:49,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:49,072 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:49,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Ended with exit code 0 [2022-02-15 13:18:49,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,541 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:49,272 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1696180363, now seen corresponding path program 538 times [2022-02-15 13:18:49,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:49,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43418969] [2022-02-15 13:18:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:49,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:49,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:49,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43418969] [2022-02-15 13:18:49,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43418969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:49,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306580704] [2022-02-15 13:18:49,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:18:49,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:49,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:49,464 INFO L229 MonitoredProcess]: Starting monitored process 542 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:49,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-02-15 13:18:49,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:18:49,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:49,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:49,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:49,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306580704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:49,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:49,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 12] total 25 [2022-02-15 13:18:49,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179333648] [2022-02-15 13:18:49,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:49,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:18:49,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:18:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:18:49,672 INFO L87 Difference]: Start difference. First operand 30042 states and 95572 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-02-15 13:18:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:51,395 INFO L93 Difference]: Finished difference Result 32560 states and 101433 transitions. [2022-02-15 13:18:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-15 13:18:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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 26 [2022-02-15 13:18:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:51,504 INFO L225 Difference]: With dead ends: 32560 [2022-02-15 13:18:51,504 INFO L226 Difference]: Without dead ends: 32554 [2022-02-15 13:18:51,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6473 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5189, Invalid=13171, Unknown=0, NotChecked=0, Total=18360 [2022-02-15 13:18:51,507 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:51,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 276 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32554 states. [2022-02-15 13:18:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32554 to 29608. [2022-02-15 13:18:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29608 states, 29607 states have (on average 3.1779646705171074) internal successors, (94090), 29607 states have internal predecessors, (94090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:52,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29608 states to 29608 states and 94090 transitions. [2022-02-15 13:18:52,400 INFO L78 Accepts]: Start accepts. Automaton has 29608 states and 94090 transitions. Word has length 26 [2022-02-15 13:18:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:52,400 INFO L470 AbstractCegarLoop]: Abstraction has 29608 states and 94090 transitions. [2022-02-15 13:18:52,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-02-15 13:18:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 29608 states and 94090 transitions. [2022-02-15 13:18:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:52,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:52,463 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:52,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Ended with exit code 0 [2022-02-15 13:18:52,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2022-02-15 13:18:52,664 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1662581135, now seen corresponding path program 539 times [2022-02-15 13:18:52,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:52,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058730361] [2022-02-15 13:18:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:52,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:52,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:52,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058730361] [2022-02-15 13:18:52,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058730361] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:52,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049367856] [2022-02-15 13:18:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:18:52,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:52,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:52,725 INFO L229 MonitoredProcess]: Starting monitored process 543 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:52,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-02-15 13:18:52,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:18:52,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:52,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:52,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:52,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049367856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:52,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:52,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 26 [2022-02-15 13:18:52,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698755111] [2022-02-15 13:18:52,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:52,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:18:52,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:18:52,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:18:52,935 INFO L87 Difference]: Start difference. First operand 29608 states and 94090 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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) [2022-02-15 13:18:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:54,505 INFO L93 Difference]: Finished difference Result 32780 states and 102273 transitions. [2022-02-15 13:18:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-15 13:18:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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 26 [2022-02-15 13:18:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:54,617 INFO L225 Difference]: With dead ends: 32780 [2022-02-15 13:18:54,618 INFO L226 Difference]: Without dead ends: 32772 [2022-02-15 13:18:54,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5717 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4538, Invalid=11974, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 13:18:54,620 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 356 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:54,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 226 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32772 states. [2022-02-15 13:18:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32772 to 29830. [2022-02-15 13:18:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29830 states, 29829 states have (on average 3.1797244292467064) internal successors, (94848), 29829 states have internal predecessors, (94848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29830 states to 29830 states and 94848 transitions. [2022-02-15 13:18:55,508 INFO L78 Accepts]: Start accepts. Automaton has 29830 states and 94848 transitions. Word has length 26 [2022-02-15 13:18:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:55,508 INFO L470 AbstractCegarLoop]: Abstraction has 29830 states and 94848 transitions. [2022-02-15 13:18:55,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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) [2022-02-15 13:18:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 29830 states and 94848 transitions. [2022-02-15 13:18:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:55,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:55,679 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:55,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Forceful destruction successful, exit code 0 [2022-02-15 13:18:55,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2022-02-15 13:18:55,879 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash 621005067, now seen corresponding path program 540 times [2022-02-15 13:18:55,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:55,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512976296] [2022-02-15 13:18:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:55,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:55,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:55,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512976296] [2022-02-15 13:18:55,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512976296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:55,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140202124] [2022-02-15 13:18:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:18:55,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:55,945 INFO L229 MonitoredProcess]: Starting monitored process 544 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:55,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-02-15 13:18:55,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:18:55,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:18:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:56,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:56,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140202124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:56,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:56,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 27 [2022-02-15 13:18:56,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656696965] [2022-02-15 13:18:56,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:56,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:18:56,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:18:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:18:56,163 INFO L87 Difference]: Start difference. First operand 29830 states and 94848 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-15 13:18:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:18:57,635 INFO L93 Difference]: Finished difference Result 33134 states and 103498 transitions. [2022-02-15 13:18:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-15 13:18:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 26 [2022-02-15 13:18:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:18:57,749 INFO L225 Difference]: With dead ends: 33134 [2022-02-15 13:18:57,749 INFO L226 Difference]: Without dead ends: 33122 [2022-02-15 13:18:57,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4017, Invalid=10989, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 13:18:57,751 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 290 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:18:57,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 271 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:18:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33122 states. [2022-02-15 13:18:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33122 to 30107. [2022-02-15 13:18:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30107 states, 30106 states have (on average 3.1811931176509667) internal successors, (95773), 30106 states have internal predecessors, (95773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:18:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30107 states to 30107 states and 95773 transitions. [2022-02-15 13:18:58,591 INFO L78 Accepts]: Start accepts. Automaton has 30107 states and 95773 transitions. Word has length 26 [2022-02-15 13:18:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:18:58,591 INFO L470 AbstractCegarLoop]: Abstraction has 30107 states and 95773 transitions. [2022-02-15 13:18:58,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-02-15 13:18:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 30107 states and 95773 transitions. [2022-02-15 13:18:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:18:58,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:18:58,653 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:18:58,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Ended with exit code 0 [2022-02-15 13:18:58,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2022-02-15 13:18:58,854 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:18:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:18:58,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1603081969, now seen corresponding path program 541 times [2022-02-15 13:18:58,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:18:58,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853839079] [2022-02-15 13:18:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:18:58,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:18:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:58,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:18:58,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853839079] [2022-02-15 13:18:58,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853839079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:18:58,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991030770] [2022-02-15 13:18:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:18:58,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:18:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:18:58,925 INFO L229 MonitoredProcess]: Starting monitored process 545 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:18:58,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-02-15 13:18:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:18:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:18:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:18:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:18:59,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:18:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:18:59,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991030770] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:18:59,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:18:59,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 28 [2022-02-15 13:18:59,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116123244] [2022-02-15 13:18:59,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:18:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:18:59,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:18:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:18:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:18:59,148 INFO L87 Difference]: Start difference. First operand 30107 states and 95773 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2022-02-15 13:19:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:00,621 INFO L93 Difference]: Finished difference Result 33604 states and 105046 transitions. [2022-02-15 13:19:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-15 13:19:00,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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 26 [2022-02-15 13:19:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:00,720 INFO L225 Difference]: With dead ends: 33604 [2022-02-15 13:19:00,720 INFO L226 Difference]: Without dead ends: 33588 [2022-02-15 13:19:00,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4669 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3628, Invalid=10178, Unknown=0, NotChecked=0, Total=13806 [2022-02-15 13:19:00,720 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 262 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:00,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 254 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:19:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33588 states. [2022-02-15 13:19:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33588 to 30921. [2022-02-15 13:19:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30921 states, 30920 states have (on average 3.184411384217335) internal successors, (98462), 30920 states have internal predecessors, (98462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30921 states to 30921 states and 98462 transitions. [2022-02-15 13:19:01,630 INFO L78 Accepts]: Start accepts. Automaton has 30921 states and 98462 transitions. Word has length 26 [2022-02-15 13:19:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:01,631 INFO L470 AbstractCegarLoop]: Abstraction has 30921 states and 98462 transitions. [2022-02-15 13:19:01,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2022-02-15 13:19:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 30921 states and 98462 transitions. [2022-02-15 13:19:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:01,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:01,692 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:01,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Ended with exit code 0 [2022-02-15 13:19:01,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2022-02-15 13:19:01,892 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1830303349, now seen corresponding path program 542 times [2022-02-15 13:19:01,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:01,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347223622] [2022-02-15 13:19:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:01,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:01,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:01,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347223622] [2022-02-15 13:19:01,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347223622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:01,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964500108] [2022-02-15 13:19:01,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:19:01,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:01,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:01,967 INFO L229 MonitoredProcess]: Starting monitored process 546 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:01,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-02-15 13:19:01,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:19:01,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:01,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:01,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:02,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:02,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964500108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:02,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:02,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 29 [2022-02-15 13:19:02,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16179354] [2022-02-15 13:19:02,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:02,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:19:02,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:02,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:19:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:19:02,190 INFO L87 Difference]: Start difference. First operand 30921 states and 98462 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2022-02-15 13:19:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:03,394 INFO L93 Difference]: Finished difference Result 34622 states and 108395 transitions. [2022-02-15 13:19:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-15 13:19:03,395 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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 26 [2022-02-15 13:19:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:03,487 INFO L225 Difference]: With dead ends: 34622 [2022-02-15 13:19:03,487 INFO L226 Difference]: Without dead ends: 34602 [2022-02-15 13:19:03,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3372, Invalid=9510, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 13:19:03,489 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 294 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:03,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 217 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:19:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34602 states. [2022-02-15 13:19:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34602 to 31830. [2022-02-15 13:19:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31830 states, 31829 states have (on average 3.1889157686386627) internal successors, (101500), 31829 states have internal predecessors, (101500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31830 states to 31830 states and 101500 transitions. [2022-02-15 13:19:04,368 INFO L78 Accepts]: Start accepts. Automaton has 31830 states and 101500 transitions. Word has length 26 [2022-02-15 13:19:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:04,368 INFO L470 AbstractCegarLoop]: Abstraction has 31830 states and 101500 transitions. [2022-02-15 13:19:04,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2022-02-15 13:19:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 31830 states and 101500 transitions. [2022-02-15 13:19:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:04,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:04,428 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:04,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Forceful destruction successful, exit code 0 [2022-02-15 13:19:04,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2022-02-15 13:19:04,628 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash -284231537, now seen corresponding path program 543 times [2022-02-15 13:19:04,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:04,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872257088] [2022-02-15 13:19:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:04,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:04,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:04,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872257088] [2022-02-15 13:19:04,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872257088] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:04,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825805760] [2022-02-15 13:19:04,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:19:04,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:04,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:04,712 INFO L229 MonitoredProcess]: Starting monitored process 547 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:04,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-02-15 13:19:04,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:19:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:04,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:04,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825805760] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:04,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:04,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-02-15 13:19:04,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634501502] [2022-02-15 13:19:04,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:04,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:19:04,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:19:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:19:04,944 INFO L87 Difference]: Start difference. First operand 31830 states and 101500 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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) [2022-02-15 13:19:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:06,070 INFO L93 Difference]: Finished difference Result 34324 states and 107694 transitions. [2022-02-15 13:19:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 13:19:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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 26 [2022-02-15 13:19:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:06,173 INFO L225 Difference]: With dead ends: 34324 [2022-02-15 13:19:06,174 INFO L226 Difference]: Without dead ends: 34300 [2022-02-15 13:19:06,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3964 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3249, Invalid=8961, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 13:19:06,175 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:06,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:19:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34300 states. [2022-02-15 13:19:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34300 to 31889. [2022-02-15 13:19:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31889 states, 31888 states have (on average 3.188817109884596) internal successors, (101685), 31888 states have internal predecessors, (101685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31889 states to 31889 states and 101685 transitions. [2022-02-15 13:19:07,214 INFO L78 Accepts]: Start accepts. Automaton has 31889 states and 101685 transitions. Word has length 26 [2022-02-15 13:19:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:07,214 INFO L470 AbstractCegarLoop]: Abstraction has 31889 states and 101685 transitions. [2022-02-15 13:19:07,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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) [2022-02-15 13:19:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 31889 states and 101685 transitions. [2022-02-15 13:19:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:07,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:07,275 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:07,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Forceful destruction successful, exit code 0 [2022-02-15 13:19:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2022-02-15 13:19:07,475 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1067088071, now seen corresponding path program 544 times [2022-02-15 13:19:07,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:07,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083833620] [2022-02-15 13:19:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:07,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:07,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:07,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083833620] [2022-02-15 13:19:07,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083833620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:07,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196622528] [2022-02-15 13:19:07,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:19:07,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:07,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:07,526 INFO L229 MonitoredProcess]: Starting monitored process 548 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:07,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-02-15 13:19:07,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:19:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:07,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:07,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196622528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:07,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:07,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 11] total 25 [2022-02-15 13:19:07,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822721455] [2022-02-15 13:19:07,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:07,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:07,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:07,738 INFO L87 Difference]: Start difference. First operand 31889 states and 101685 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-02-15 13:19:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:08,973 INFO L93 Difference]: Finished difference Result 42994 states and 135578 transitions. [2022-02-15 13:19:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 13:19:08,973 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 26 [2022-02-15 13:19:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:09,106 INFO L225 Difference]: With dead ends: 42994 [2022-02-15 13:19:09,107 INFO L226 Difference]: Without dead ends: 42979 [2022-02-15 13:19:09,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2766, Invalid=5424, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 13:19:09,107 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 468 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:09,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 243 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42979 states. [2022-02-15 13:19:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42979 to 37887. [2022-02-15 13:19:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37887 states, 37886 states have (on average 3.2266800401203612) internal successors, (122246), 37886 states have internal predecessors, (122246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37887 states to 37887 states and 122246 transitions. [2022-02-15 13:19:10,230 INFO L78 Accepts]: Start accepts. Automaton has 37887 states and 122246 transitions. Word has length 26 [2022-02-15 13:19:10,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:10,230 INFO L470 AbstractCegarLoop]: Abstraction has 37887 states and 122246 transitions. [2022-02-15 13:19:10,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-02-15 13:19:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37887 states and 122246 transitions. [2022-02-15 13:19:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:10,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:10,301 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:10,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Ended with exit code 0 [2022-02-15 13:19:10,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2022-02-15 13:19:10,502 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 602496967, now seen corresponding path program 545 times [2022-02-15 13:19:10,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:10,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834370273] [2022-02-15 13:19:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:10,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:10,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:10,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834370273] [2022-02-15 13:19:10,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834370273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:10,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126946308] [2022-02-15 13:19:10,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:19:10,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:10,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:10,552 INFO L229 MonitoredProcess]: Starting monitored process 549 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:10,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-02-15 13:19:10,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:19:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:10,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:10,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126946308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:10,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:10,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 11] total 25 [2022-02-15 13:19:10,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258929735] [2022-02-15 13:19:10,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:10,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:10,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:10,890 INFO L87 Difference]: Start difference. First operand 37887 states and 122246 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2022-02-15 13:19:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:12,809 INFO L93 Difference]: Finished difference Result 41043 states and 129835 transitions. [2022-02-15 13:19:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-15 13:19:12,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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 26 [2022-02-15 13:19:12,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:12,931 INFO L225 Difference]: With dead ends: 41043 [2022-02-15 13:19:12,931 INFO L226 Difference]: Without dead ends: 41039 [2022-02-15 13:19:12,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9062 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5710, Invalid=15752, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 13:19:12,932 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 381 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:12,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 251 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41039 states. [2022-02-15 13:19:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41039 to 37190. [2022-02-15 13:19:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37190 states, 37189 states have (on average 3.2220817983812418) internal successors, (119826), 37189 states have internal predecessors, (119826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37190 states to 37190 states and 119826 transitions. [2022-02-15 13:19:13,953 INFO L78 Accepts]: Start accepts. Automaton has 37190 states and 119826 transitions. Word has length 26 [2022-02-15 13:19:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:13,953 INFO L470 AbstractCegarLoop]: Abstraction has 37190 states and 119826 transitions. [2022-02-15 13:19:13,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 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) [2022-02-15 13:19:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 37190 states and 119826 transitions. [2022-02-15 13:19:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:14,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:14,023 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:14,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Ended with exit code 0 [2022-02-15 13:19:14,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2022-02-15 13:19:14,224 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 568897739, now seen corresponding path program 546 times [2022-02-15 13:19:14,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:14,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160761121] [2022-02-15 13:19:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:14,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:14,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:14,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160761121] [2022-02-15 13:19:14,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160761121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:14,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510309556] [2022-02-15 13:19:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:19:14,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:14,278 INFO L229 MonitoredProcess]: Starting monitored process 550 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:14,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Waiting until timeout for monitored process [2022-02-15 13:19:14,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:19:14,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:14,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:14,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:14,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:14,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510309556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:14,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:14,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 12] total 26 [2022-02-15 13:19:14,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128252103] [2022-02-15 13:19:14,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:14,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:19:14,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:14,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:19:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:19:14,490 INFO L87 Difference]: Start difference. First operand 37190 states and 119826 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-02-15 13:19:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:16,431 INFO L93 Difference]: Finished difference Result 41476 states and 131495 transitions. [2022-02-15 13:19:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-15 13:19:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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 26 [2022-02-15 13:19:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:16,562 INFO L225 Difference]: With dead ends: 41476 [2022-02-15 13:19:16,562 INFO L226 Difference]: Without dead ends: 41468 [2022-02-15 13:19:16,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7785 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4932, Invalid=13974, Unknown=0, NotChecked=0, Total=18906 [2022-02-15 13:19:16,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 375 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:16,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 246 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41468 states. [2022-02-15 13:19:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41468 to 37586. [2022-02-15 13:19:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37586 states, 37585 states have (on average 3.2260476253824666) internal successors, (121251), 37585 states have internal predecessors, (121251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37586 states to 37586 states and 121251 transitions. [2022-02-15 13:19:17,556 INFO L78 Accepts]: Start accepts. Automaton has 37586 states and 121251 transitions. Word has length 26 [2022-02-15 13:19:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:17,556 INFO L470 AbstractCegarLoop]: Abstraction has 37586 states and 121251 transitions. [2022-02-15 13:19:17,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 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) [2022-02-15 13:19:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 37586 states and 121251 transitions. [2022-02-15 13:19:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:17,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:17,628 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:17,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Forceful destruction successful, exit code 0 [2022-02-15 13:19:17,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,550 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:17,828 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -472678329, now seen corresponding path program 547 times [2022-02-15 13:19:17,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:17,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098282951] [2022-02-15 13:19:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:17,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:17,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:17,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098282951] [2022-02-15 13:19:17,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098282951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:17,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204801919] [2022-02-15 13:19:17,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:19:17,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:17,888 INFO L229 MonitoredProcess]: Starting monitored process 551 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:17,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Waiting until timeout for monitored process [2022-02-15 13:19:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:18,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:18,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204801919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:18,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:18,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 27 [2022-02-15 13:19:18,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077721636] [2022-02-15 13:19:18,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:18,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:19:18,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:19:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:19:18,104 INFO L87 Difference]: Start difference. First operand 37586 states and 121251 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-02-15 13:19:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:19,799 INFO L93 Difference]: Finished difference Result 42209 states and 134096 transitions. [2022-02-15 13:19:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-15 13:19:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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 26 [2022-02-15 13:19:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:19,934 INFO L225 Difference]: With dead ends: 42209 [2022-02-15 13:19:19,934 INFO L226 Difference]: Without dead ends: 42197 [2022-02-15 13:19:19,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6708 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4267, Invalid=12503, Unknown=0, NotChecked=0, Total=16770 [2022-02-15 13:19:19,935 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 347 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:19,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 239 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42197 states. [2022-02-15 13:19:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42197 to 38325. [2022-02-15 13:19:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38325 states, 38324 states have (on average 3.2297515916918904) internal successors, (123777), 38324 states have internal predecessors, (123777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38325 states to 38325 states and 123777 transitions. [2022-02-15 13:19:21,050 INFO L78 Accepts]: Start accepts. Automaton has 38325 states and 123777 transitions. Word has length 26 [2022-02-15 13:19:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:21,050 INFO L470 AbstractCegarLoop]: Abstraction has 38325 states and 123777 transitions. [2022-02-15 13:19:21,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 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) [2022-02-15 13:19:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 38325 states and 123777 transitions. [2022-02-15 13:19:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:21,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:21,124 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:21,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Ended with exit code 0 [2022-02-15 13:19:21,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,551 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:21,324 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1598201931, now seen corresponding path program 548 times [2022-02-15 13:19:21,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:21,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422538080] [2022-02-15 13:19:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:21,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:21,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:21,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422538080] [2022-02-15 13:19:21,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422538080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:21,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939452102] [2022-02-15 13:19:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:19:21,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:21,390 INFO L229 MonitoredProcess]: Starting monitored process 552 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:21,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Waiting until timeout for monitored process [2022-02-15 13:19:21,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:19:21,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:21,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:21,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939452102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:21,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:21,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 28 [2022-02-15 13:19:21,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471528009] [2022-02-15 13:19:21,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:21,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:19:21,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:19:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:19:21,611 INFO L87 Difference]: Start difference. First operand 38325 states and 123777 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-02-15 13:19:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:23,249 INFO L93 Difference]: Finished difference Result 43278 states and 137750 transitions. [2022-02-15 13:19:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-15 13:19:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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 26 [2022-02-15 13:19:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:23,383 INFO L225 Difference]: With dead ends: 43278 [2022-02-15 13:19:23,383 INFO L226 Difference]: Without dead ends: 43262 [2022-02-15 13:19:23,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5806 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3724, Invalid=11282, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 13:19:23,384 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 329 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:23,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 273 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:19:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43262 states. [2022-02-15 13:19:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43262 to 39413. [2022-02-15 13:19:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39413 states, 39412 states have (on average 3.2331269664061706) internal successors, (127424), 39412 states have internal predecessors, (127424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39413 states to 39413 states and 127424 transitions. [2022-02-15 13:19:24,619 INFO L78 Accepts]: Start accepts. Automaton has 39413 states and 127424 transitions. Word has length 26 [2022-02-15 13:19:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:24,619 INFO L470 AbstractCegarLoop]: Abstraction has 39413 states and 127424 transitions. [2022-02-15 13:19:24,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-02-15 13:19:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 39413 states and 127424 transitions. [2022-02-15 13:19:24,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:24,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:24,696 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:24,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Ended with exit code 0 [2022-02-15 13:19:24,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,552 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:24,896 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:24,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1370980551, now seen corresponding path program 549 times [2022-02-15 13:19:24,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:24,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141302068] [2022-02-15 13:19:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:24,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:24,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:24,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141302068] [2022-02-15 13:19:24,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141302068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:24,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995819638] [2022-02-15 13:19:24,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:19:24,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:24,970 INFO L229 MonitoredProcess]: Starting monitored process 553 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:24,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Waiting until timeout for monitored process [2022-02-15 13:19:24,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:19:24,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:25,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:25,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995819638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:25,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:25,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 29 [2022-02-15 13:19:25,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028845841] [2022-02-15 13:19:25,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:25,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 13:19:25,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 13:19:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:19:25,197 INFO L87 Difference]: Start difference. First operand 39413 states and 127424 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-02-15 13:19:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:26,737 INFO L93 Difference]: Finished difference Result 44769 states and 142689 transitions. [2022-02-15 13:19:26,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-15 13:19:26,737 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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 26 [2022-02-15 13:19:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:26,868 INFO L225 Difference]: With dead ends: 44769 [2022-02-15 13:19:26,868 INFO L226 Difference]: Without dead ends: 44749 [2022-02-15 13:19:26,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5076 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3311, Invalid=10261, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 13:19:26,868 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 310 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:26,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 249 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44749 states. [2022-02-15 13:19:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44749 to 41645. [2022-02-15 13:19:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41645 states, 41644 states have (on average 3.238041494573048) internal successors, (134845), 41644 states have internal predecessors, (134845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41645 states to 41645 states and 134845 transitions. [2022-02-15 13:19:28,027 INFO L78 Accepts]: Start accepts. Automaton has 41645 states and 134845 transitions. Word has length 26 [2022-02-15 13:19:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:28,027 INFO L470 AbstractCegarLoop]: Abstraction has 41645 states and 134845 transitions. [2022-02-15 13:19:28,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2022-02-15 13:19:28,027 INFO L276 IsEmpty]: Start isEmpty. Operand 41645 states and 134845 transitions. [2022-02-15 13:19:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:28,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:28,104 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:28,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Ended with exit code 0 [2022-02-15 13:19:28,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2022-02-15 13:19:28,304 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1377914933, now seen corresponding path program 550 times [2022-02-15 13:19:28,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:28,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84246235] [2022-02-15 13:19:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:28,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:28,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:28,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84246235] [2022-02-15 13:19:28,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84246235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:28,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209414620] [2022-02-15 13:19:28,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:19:28,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:28,382 INFO L229 MonitoredProcess]: Starting monitored process 554 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Waiting until timeout for monitored process [2022-02-15 13:19:28,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:19:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:28,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:19:28,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209414620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:28,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:28,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 30 [2022-02-15 13:19:28,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558590330] [2022-02-15 13:19:28,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:28,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 13:19:28,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 13:19:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:19:28,617 INFO L87 Difference]: Start difference. First operand 41645 states and 134845 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 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) [2022-02-15 13:19:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:30,108 INFO L93 Difference]: Finished difference Result 47008 states and 150165 transitions. [2022-02-15 13:19:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 13:19:30,108 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 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 26 [2022-02-15 13:19:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:30,258 INFO L225 Difference]: With dead ends: 47008 [2022-02-15 13:19:30,258 INFO L226 Difference]: Without dead ends: 46984 [2022-02-15 13:19:30,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4520 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3035, Invalid=9397, Unknown=0, NotChecked=0, Total=12432 [2022-02-15 13:19:30,259 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 331 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:30,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 249 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:19:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46984 states. [2022-02-15 13:19:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46984 to 43802. [2022-02-15 13:19:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43802 states, 43801 states have (on average 3.243510422136481) internal successors, (142069), 43801 states have internal predecessors, (142069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43802 states to 43802 states and 142069 transitions. [2022-02-15 13:19:31,599 INFO L78 Accepts]: Start accepts. Automaton has 43802 states and 142069 transitions. Word has length 26 [2022-02-15 13:19:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:31,599 INFO L470 AbstractCegarLoop]: Abstraction has 43802 states and 142069 transitions. [2022-02-15 13:19:31,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 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) [2022-02-15 13:19:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 43802 states and 142069 transitions. [2022-02-15 13:19:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:31,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:31,684 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:31,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Ended with exit code 0 [2022-02-15 13:19:31,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,554 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:31,887 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:31,888 INFO L85 PathProgramCache]: Analyzing trace with hash -694329017, now seen corresponding path program 551 times [2022-02-15 13:19:31,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:31,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659446581] [2022-02-15 13:19:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:31,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:31,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:31,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659446581] [2022-02-15 13:19:31,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659446581] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:31,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121431946] [2022-02-15 13:19:31,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:19:31,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:31,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:31,971 INFO L229 MonitoredProcess]: Starting monitored process 555 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:31,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Waiting until timeout for monitored process [2022-02-15 13:19:31,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:19:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:32,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:32,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121431946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:32,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:32,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-02-15 13:19:32,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205508848] [2022-02-15 13:19:32,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:32,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 13:19:32,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 13:19:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:19:32,212 INFO L87 Difference]: Start difference. First operand 43802 states and 142069 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) [2022-02-15 13:19:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:33,490 INFO L93 Difference]: Finished difference Result 46885 states and 150062 transitions. [2022-02-15 13:19:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 13:19:33,490 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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 26 [2022-02-15 13:19:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:33,637 INFO L225 Difference]: With dead ends: 46885 [2022-02-15 13:19:33,637 INFO L226 Difference]: Without dead ends: 46857 [2022-02-15 13:19:33,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3982 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2902, Invalid=8654, Unknown=0, NotChecked=0, Total=11556 [2022-02-15 13:19:33,638 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 240 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:33,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 202 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:19:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46857 states. [2022-02-15 13:19:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46857 to 43877. [2022-02-15 13:19:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43877 states, 43876 states have (on average 3.243390464035008) internal successors, (142307), 43876 states have internal predecessors, (142307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43877 states to 43877 states and 142307 transitions. [2022-02-15 13:19:34,924 INFO L78 Accepts]: Start accepts. Automaton has 43877 states and 142307 transitions. Word has length 26 [2022-02-15 13:19:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:34,924 INFO L470 AbstractCegarLoop]: Abstraction has 43877 states and 142307 transitions. [2022-02-15 13:19:34,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) [2022-02-15 13:19:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 43877 states and 142307 transitions. [2022-02-15 13:19:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:35,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:35,008 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:35,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Ended with exit code 0 [2022-02-15 13:19:35,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2022-02-15 13:19:35,208 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1045070201, now seen corresponding path program 552 times [2022-02-15 13:19:35,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:35,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6539867] [2022-02-15 13:19:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:35,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:35,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:35,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6539867] [2022-02-15 13:19:35,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6539867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:35,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798741424] [2022-02-15 13:19:35,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:19:35,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:35,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:35,288 INFO L229 MonitoredProcess]: Starting monitored process 556 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:35,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Waiting until timeout for monitored process [2022-02-15 13:19:35,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:19:35,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:35,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:35,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:35,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798741424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:35,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:35,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2022-02-15 13:19:35,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937364868] [2022-02-15 13:19:35,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:35,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:19:35,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:19:35,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:19:35,446 INFO L87 Difference]: Start difference. First operand 43877 states and 142307 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:35,935 INFO L93 Difference]: Finished difference Result 49441 states and 158707 transitions. [2022-02-15 13:19:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:19:35,935 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:36,112 INFO L225 Difference]: With dead ends: 49441 [2022-02-15 13:19:36,112 INFO L226 Difference]: Without dead ends: 49441 [2022-02-15 13:19:36,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:19:36,113 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:36,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 97 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:19:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49441 states. [2022-02-15 13:19:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49441 to 44031. [2022-02-15 13:19:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44031 states, 44030 states have (on average 3.2426073131955486) internal successors, (142772), 44030 states have internal predecessors, (142772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44031 states to 44031 states and 142772 transitions. [2022-02-15 13:19:37,549 INFO L78 Accepts]: Start accepts. Automaton has 44031 states and 142772 transitions. Word has length 26 [2022-02-15 13:19:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:37,550 INFO L470 AbstractCegarLoop]: Abstraction has 44031 states and 142772 transitions. [2022-02-15 13:19:37,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 44031 states and 142772 transitions. [2022-02-15 13:19:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:37,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:37,635 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:37,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Forceful destruction successful, exit code 0 [2022-02-15 13:19:37,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2022-02-15 13:19:37,836 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1821456173, now seen corresponding path program 553 times [2022-02-15 13:19:37,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:37,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563242377] [2022-02-15 13:19:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:37,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:37,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:37,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563242377] [2022-02-15 13:19:37,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563242377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:37,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116042576] [2022-02-15 13:19:37,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:19:37,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:37,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:37,916 INFO L229 MonitoredProcess]: Starting monitored process 557 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:37,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Waiting until timeout for monitored process [2022-02-15 13:19:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:38,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:38,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116042576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:38,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:38,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:19:38,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789989622] [2022-02-15 13:19:38,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:38,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:38,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:38,082 INFO L87 Difference]: Start difference. First operand 44031 states and 142772 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:38,658 INFO L93 Difference]: Finished difference Result 46562 states and 149936 transitions. [2022-02-15 13:19:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 13:19:38,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:38,803 INFO L225 Difference]: With dead ends: 46562 [2022-02-15 13:19:38,803 INFO L226 Difference]: Without dead ends: 46562 [2022-02-15 13:19:38,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:19:38,803 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 130 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:38,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 108 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:19:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46562 states. [2022-02-15 13:19:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46562 to 44113. [2022-02-15 13:19:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44113 states, 44112 states have (on average 3.2421563293434894) internal successors, (143018), 44112 states have internal predecessors, (143018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44113 states to 44113 states and 143018 transitions. [2022-02-15 13:19:39,957 INFO L78 Accepts]: Start accepts. Automaton has 44113 states and 143018 transitions. Word has length 26 [2022-02-15 13:19:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:39,957 INFO L470 AbstractCegarLoop]: Abstraction has 44113 states and 143018 transitions. [2022-02-15 13:19:39,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 44113 states and 143018 transitions. [2022-02-15 13:19:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:40,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:40,042 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:40,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Ended with exit code 0 [2022-02-15 13:19:40,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 557 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2022-02-15 13:19:40,243 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1283963317, now seen corresponding path program 554 times [2022-02-15 13:19:40,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:40,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286100645] [2022-02-15 13:19:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:40,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:40,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:40,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286100645] [2022-02-15 13:19:40,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286100645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:40,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637883504] [2022-02-15 13:19:40,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:19:40,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:40,325 INFO L229 MonitoredProcess]: Starting monitored process 558 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:40,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Waiting until timeout for monitored process [2022-02-15 13:19:40,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:19:40,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:40,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:40,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:40,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:40,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637883504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:40,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:40,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:19:40,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468242050] [2022-02-15 13:19:40,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:40,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:40,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:40,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:40,493 INFO L87 Difference]: Start difference. First operand 44113 states and 143018 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:41,343 INFO L93 Difference]: Finished difference Result 48235 states and 154817 transitions. [2022-02-15 13:19:41,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:19:41,344 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:41,501 INFO L225 Difference]: With dead ends: 48235 [2022-02-15 13:19:41,501 INFO L226 Difference]: Without dead ends: 48235 [2022-02-15 13:19:41,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1012, Invalid=2068, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:19:41,501 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:41,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 202 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:19:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48235 states. [2022-02-15 13:19:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48235 to 44213. [2022-02-15 13:19:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44213 states, 44212 states have (on average 3.241608613046232) internal successors, (143318), 44212 states have internal predecessors, (143318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44213 states to 44213 states and 143318 transitions. [2022-02-15 13:19:42,938 INFO L78 Accepts]: Start accepts. Automaton has 44213 states and 143318 transitions. Word has length 26 [2022-02-15 13:19:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:42,938 INFO L470 AbstractCegarLoop]: Abstraction has 44213 states and 143318 transitions. [2022-02-15 13:19:42,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 44213 states and 143318 transitions. [2022-02-15 13:19:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:43,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:43,022 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:43,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Ended with exit code 0 [2022-02-15 13:19:43,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,558 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:43,223 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash -435340845, now seen corresponding path program 555 times [2022-02-15 13:19:43,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:43,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379492149] [2022-02-15 13:19:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:43,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:43,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:43,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379492149] [2022-02-15 13:19:43,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379492149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:43,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694652850] [2022-02-15 13:19:43,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:19:43,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:43,301 INFO L229 MonitoredProcess]: Starting monitored process 559 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:43,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Waiting until timeout for monitored process [2022-02-15 13:19:43,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:19:43,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:43,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:43,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:43,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:43,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694652850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:43,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:43,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:19:43,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039543152] [2022-02-15 13:19:43,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:43,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:43,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:43,469 INFO L87 Difference]: Start difference. First operand 44213 states and 143318 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:44,505 INFO L93 Difference]: Finished difference Result 48961 states and 156816 transitions. [2022-02-15 13:19:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:19:44,505 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:44,655 INFO L225 Difference]: With dead ends: 48961 [2022-02-15 13:19:44,656 INFO L226 Difference]: Without dead ends: 48961 [2022-02-15 13:19:44,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1750, Invalid=3506, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:19:44,656 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:44,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 175 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:19:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48961 states. [2022-02-15 13:19:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48961 to 44558. [2022-02-15 13:19:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44558 states, 44557 states have (on average 3.239737863859775) internal successors, (144353), 44557 states have internal predecessors, (144353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44558 states to 44558 states and 144353 transitions. [2022-02-15 13:19:45,956 INFO L78 Accepts]: Start accepts. Automaton has 44558 states and 144353 transitions. Word has length 26 [2022-02-15 13:19:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:45,957 INFO L470 AbstractCegarLoop]: Abstraction has 44558 states and 144353 transitions. [2022-02-15 13:19:45,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 44558 states and 144353 transitions. [2022-02-15 13:19:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:46,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:46,054 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:46,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Ended with exit code 0 [2022-02-15 13:19:46,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2022-02-15 13:19:46,254 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1254602059, now seen corresponding path program 556 times [2022-02-15 13:19:46,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:46,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402432337] [2022-02-15 13:19:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:46,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:46,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:46,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402432337] [2022-02-15 13:19:46,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402432337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:46,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100352496] [2022-02-15 13:19:46,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:19:46,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:46,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:46,335 INFO L229 MonitoredProcess]: Starting monitored process 560 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:46,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Waiting until timeout for monitored process [2022-02-15 13:19:46,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:19:46,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:46,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:46,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:46,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:46,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100352496] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:46,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:46,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:19:46,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818560948] [2022-02-15 13:19:46,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:46,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:46,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:46,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:46,507 INFO L87 Difference]: Start difference. First operand 44558 states and 144353 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:47,846 INFO L93 Difference]: Finished difference Result 49314 states and 157697 transitions. [2022-02-15 13:19:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:19:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:48,021 INFO L225 Difference]: With dead ends: 49314 [2022-02-15 13:19:48,021 INFO L226 Difference]: Without dead ends: 49314 [2022-02-15 13:19:48,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2647, Invalid=5363, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 13:19:48,022 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:48,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 216 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:19:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49314 states. [2022-02-15 13:19:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49314 to 44956. [2022-02-15 13:19:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44956 states, 44955 states have (on average 3.237548659770882) internal successors, (145544), 44955 states have internal predecessors, (145544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44956 states to 44956 states and 145544 transitions. [2022-02-15 13:19:49,439 INFO L78 Accepts]: Start accepts. Automaton has 44956 states and 145544 transitions. Word has length 26 [2022-02-15 13:19:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:49,439 INFO L470 AbstractCegarLoop]: Abstraction has 44956 states and 145544 transitions. [2022-02-15 13:19:49,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 44956 states and 145544 transitions. [2022-02-15 13:19:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:49,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:49,525 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:49,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Ended with exit code 0 [2022-02-15 13:19:49,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569,560 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:49,725 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2140400339, now seen corresponding path program 557 times [2022-02-15 13:19:49,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:49,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035453219] [2022-02-15 13:19:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:49,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:49,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:49,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035453219] [2022-02-15 13:19:49,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035453219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:49,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331344442] [2022-02-15 13:19:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:19:49,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:49,804 INFO L229 MonitoredProcess]: Starting monitored process 561 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:49,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Waiting until timeout for monitored process [2022-02-15 13:19:49,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:19:49,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:49,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:49,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:49,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331344442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:49,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:49,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:19:49,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379739870] [2022-02-15 13:19:49,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:49,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:49,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:49,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:49,975 INFO L87 Difference]: Start difference. First operand 44956 states and 145544 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:51,554 INFO L93 Difference]: Finished difference Result 49524 states and 158196 transitions. [2022-02-15 13:19:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 13:19:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:51,752 INFO L225 Difference]: With dead ends: 49524 [2022-02-15 13:19:51,752 INFO L226 Difference]: Without dead ends: 49524 [2022-02-15 13:19:51,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3467, Invalid=7039, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 13:19:51,753 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:51,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 282 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49524 states. [2022-02-15 13:19:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49524 to 45272. [2022-02-15 13:19:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45272 states, 45271 states have (on average 3.2359788827284577) internal successors, (146496), 45271 states have internal predecessors, (146496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45272 states to 45272 states and 146496 transitions. [2022-02-15 13:19:53,372 INFO L78 Accepts]: Start accepts. Automaton has 45272 states and 146496 transitions. Word has length 26 [2022-02-15 13:19:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:53,372 INFO L470 AbstractCegarLoop]: Abstraction has 45272 states and 146496 transitions. [2022-02-15 13:19:53,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 45272 states and 146496 transitions. [2022-02-15 13:19:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:53,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:53,464 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:53,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Ended with exit code 0 [2022-02-15 13:19:53,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,561 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:53,665 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash -47782837, now seen corresponding path program 558 times [2022-02-15 13:19:53,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:53,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175825098] [2022-02-15 13:19:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:53,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:53,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:53,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175825098] [2022-02-15 13:19:53,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175825098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:53,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658590980] [2022-02-15 13:19:53,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:19:53,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:53,746 INFO L229 MonitoredProcess]: Starting monitored process 562 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:53,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Waiting until timeout for monitored process [2022-02-15 13:19:53,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:19:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:19:53,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:53,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:53,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658590980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:53,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:53,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:19:53,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689799738] [2022-02-15 13:19:53,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:53,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:53,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:53,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:53,928 INFO L87 Difference]: Start difference. First operand 45272 states and 146496 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:55,554 INFO L93 Difference]: Finished difference Result 49619 states and 158430 transitions. [2022-02-15 13:19:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 13:19:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:55,742 INFO L225 Difference]: With dead ends: 49619 [2022-02-15 13:19:55,742 INFO L226 Difference]: Without dead ends: 49619 [2022-02-15 13:19:55,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3733, Invalid=7397, Unknown=0, NotChecked=0, Total=11130 [2022-02-15 13:19:55,743 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 196 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:55,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 348 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49619 states. [2022-02-15 13:19:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49619 to 45591. [2022-02-15 13:19:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45591 states, 45590 states have (on average 3.234722526869928) internal successors, (147471), 45590 states have internal predecessors, (147471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45591 states to 45591 states and 147471 transitions. [2022-02-15 13:19:57,228 INFO L78 Accepts]: Start accepts. Automaton has 45591 states and 147471 transitions. Word has length 26 [2022-02-15 13:19:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:19:57,228 INFO L470 AbstractCegarLoop]: Abstraction has 45591 states and 147471 transitions. [2022-02-15 13:19:57,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:57,228 INFO L276 IsEmpty]: Start isEmpty. Operand 45591 states and 147471 transitions. [2022-02-15 13:19:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 13:19:57,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:19:57,323 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:19:57,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Forceful destruction successful, exit code 0 [2022-02-15 13:19:57,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,562 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:57,524 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 13:19:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:19:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2098387923, now seen corresponding path program 559 times [2022-02-15 13:19:57,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:19:57,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822987862] [2022-02-15 13:19:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:19:57,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:19:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:57,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:19:57,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822987862] [2022-02-15 13:19:57,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822987862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:19:57,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732257992] [2022-02-15 13:19:57,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:19:57,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:19:57,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:19:57,751 INFO L229 MonitoredProcess]: Starting monitored process 563 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:19:57,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Waiting until timeout for monitored process [2022-02-15 13:19:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:19:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-15 13:19:57,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:19:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:57,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:19:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:19:57,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732257992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:19:57,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:19:57,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-02-15 13:19:57,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894813113] [2022-02-15 13:19:57,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:19:57,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:19:57,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:19:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:19:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:19:57,927 INFO L87 Difference]: Start difference. First operand 45591 states and 147471 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:19:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:19:59,352 INFO L93 Difference]: Finished difference Result 50206 states and 160535 transitions. [2022-02-15 13:19:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 13:19:59,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 13:19:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:19:59,699 INFO L225 Difference]: With dead ends: 50206 [2022-02-15 13:19:59,699 INFO L226 Difference]: Without dead ends: 50206 [2022-02-15 13:19:59,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2847 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 13:19:59,700 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 285 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:19:59,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 286 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:19:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50206 states. Received shutdown request... [2022-02-15 13:19:59,802 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-15 13:19:59,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Ended with exit code 0 [2022-02-15 13:19:59,850 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 13:19:59,850 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 [2022-02-15 13:20:00,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable572 [2022-02-15 13:20:00,003 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-02-15 13:20:00,004 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-15 13:20:00,005 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-15 13:20:00,007 INFO L732 BasicCegarLoop]: Path program histogram: [559, 6, 6, 2] [2022-02-15 13:20:00,008 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 13:20:00,008 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 13:20:00,010 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:20:00 BasicIcfg [2022-02-15 13:20:00,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 13:20:00,010 INFO L158 Benchmark]: Toolchain (without parser) took 830120.26ms. Allocated memory was 185.6MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 151.2MB in the beginning and 4.0GB in the end (delta: -3.8GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2022-02-15 13:20:00,010 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 185.6MB. Free memory was 152.4MB in the beginning and 152.3MB in the end (delta: 75.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 13:20:00,010 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.61ms. Allocated memory is still 185.6MB. Free memory was 151.1MB in the beginning and 149.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 13:20:00,010 INFO L158 Benchmark]: Boogie Preprocessor took 10.08ms. Allocated memory is still 185.6MB. Free memory was 149.6MB in the beginning and 148.7MB in the end (delta: 887.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 13:20:00,010 INFO L158 Benchmark]: RCFGBuilder took 177.65ms. Allocated memory is still 185.6MB. Free memory was 148.6MB in the beginning and 138.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 13:20:00,011 INFO L158 Benchmark]: TraceAbstraction took 829908.43ms. Allocated memory was 185.6MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 138.3MB in the beginning and 4.0GB in the end (delta: -3.9GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2022-02-15 13:20:00,015 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 0.10ms. Allocated memory is still 185.6MB. Free memory was 152.4MB in the beginning and 152.3MB in the end (delta: 75.0kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.61ms. Allocated memory is still 185.6MB. Free memory was 151.1MB in the beginning and 149.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.08ms. Allocated memory is still 185.6MB. Free memory was 149.6MB in the beginning and 148.7MB in the end (delta: 887.8kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 177.65ms. Allocated memory is still 185.6MB. Free memory was 148.6MB in the beginning and 138.8MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 829908.43ms. Allocated memory was 185.6MB in the beginning and 7.0GB in the end (delta: 6.8GB). Free memory was 138.3MB in the beginning and 4.0GB in the end (delta: -3.9GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 829.8s, OverallIterations: 573, TraceHistogramMax: 7, PathProgramHistogramMax: 559, EmptinessCheckTime: 11.3s, AutomataDifference: 335.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 94115 SdHoareTripleChecker+Valid, 131.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 94115 mSDsluCounter, 208145 SdHoareTripleChecker+Invalid, 109.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 303091 mSDsCounter, 18095 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 362859 IncrementalHoareTripleChecker+Invalid, 380954 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18095 mSolverCounterUnsat, 16352 mSDtfsCounter, 362859 mSolverCounterSat, 1.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 46674 GetRequests, 17706 SyntacticMatches, 1753 SemanticMatches, 27215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514514 ImplicationChecksByTransitivity, 250.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45591occurred in iteration=572, InterpolantAutomatonStates: 21420, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 150.1s AutomataMinimizationTime, 573 MinimizatonAttempts, 575938 StatesRemovedByMinimization, 570 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 202.3s InterpolantComputationTime, 25012 NumberOfCodeBlocks, 25012 NumberOfCodeBlocksAsserted, 2198 NumberOfCheckSat, 35745 ConstructedInterpolants, 0 QuantifiedInterpolants, 326837 SizeOfPredicates, 1706 NumberOfNonLiveVariables, 53852 ConjunctsInSsa, 13248 ConjunctsInUnsatCore, 1697 InterpolantComputations, 11 PerfectInterpolantSequences, 12721/46497 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