/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/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 00:38:09,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 00:38:09,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 00:38:09,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 00:38:09,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 00:38:09,843 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 00:38:09,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 00:38:09,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 00:38:09,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 00:38:09,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 00:38:09,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 00:38:09,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 00:38:09,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 00:38:09,847 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 00:38:09,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 00:38:09,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 00:38:09,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 00:38:09,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 00:38:09,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 00:38:09,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 00:38:09,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 00:38:09,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 00:38:09,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 00:38:09,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:38:09,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 00:38:09,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 00:38:09,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 00:38:09,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 00:38:09,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 00:38:09,851 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 00:38:09,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 00:38:09,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 00:38:10,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 00:38:10,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 00:38:10,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 00:38:10,046 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 00:38:10,055 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 00:38:10,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2022-02-11 00:38:10,057 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2022-02-11 00:38:10,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 00:38:10,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 00:38:10,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 00:38:10,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 00:38:10,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 00:38:10,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,109 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 00:38:10,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 00:38:10,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 00:38:10,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 00:38:10,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 00:38:10,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 00:38:10,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 00:38:10,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 00:38:10,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 00:38:10,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/1) ... [2022-02-11 00:38:10,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 00:38:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:10,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-11 00:38:10,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-11 00:38:10,209 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 00:38:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 00:38:10,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 00:38:10,209 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 00:38:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 00:38:10,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 00:38:10,210 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 00:38:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 00:38:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 00:38:10,210 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 00:38:10,243 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 00:38:10,244 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 00:38:10,330 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 00:38:10,335 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 00:38:10,335 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 00:38:10,336 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:38:10 BoogieIcfgContainer [2022-02-11 00:38:10,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 00:38:10,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 00:38:10,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 00:38:10,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 00:38:10,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 12:38:10" (1/2) ... [2022-02-11 00:38:10,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db49e0e and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 12:38:10, skipping insertion in model container [2022-02-11 00:38:10,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 12:38:10" (2/2) ... [2022-02-11 00:38:10,345 INFO L112 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2022-02-11 00:38:10,361 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 00:38:10,362 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 00:38:10,362 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 00:38:10,362 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 00:38:10,398 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-11 00:38:10,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 00:38:10,478 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 00:38:10,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-11 00:38:10,490 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2022-02-11 00:38:10,515 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-11 00:38:10,523 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:10,523 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:10,524 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:10,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash -658757211, now seen corresponding path program 1 times [2022-02-11 00:38:10,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:10,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632913069] [2022-02-11 00:38:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:10,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:10,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632913069] [2022-02-11 00:38:10,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632913069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:38:10,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:38:10,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:38:10,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570696533] [2022-02-11 00:38:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:38:10,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:38:10,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:38:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:38:10,734 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 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) [2022-02-11 00:38:10,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:10,833 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2022-02-11 00:38:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:38:10,844 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 [2022-02-11 00:38:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:10,852 INFO L225 Difference]: With dead ends: 299 [2022-02-11 00:38:10,852 INFO L226 Difference]: Without dead ends: 286 [2022-02-11 00:38:10,872 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:38:10,885 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:10,887 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 55 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-02-11 00:38:10,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2022-02-11 00:38:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2022-02-11 00:38:10,939 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2022-02-11 00:38:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:10,940 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2022-02-11 00:38:10,940 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) [2022-02-11 00:38:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2022-02-11 00:38:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:38:10,941 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:10,941 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:10,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 00:38:10,942 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1900646624, now seen corresponding path program 1 times [2022-02-11 00:38:10,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:10,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295955638] [2022-02-11 00:38:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:10,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:11,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:11,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295955638] [2022-02-11 00:38:11,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295955638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:11,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636503587] [2022-02-11 00:38:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:11,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:11,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:11,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:11,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 00:38:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:38:11,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:11,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:11,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636503587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:11,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:11,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-11 00:38:11,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063776679] [2022-02-11 00:38:11,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:11,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:11,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:11,175 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:11,254 INFO L93 Difference]: Finished difference Result 274 states and 579 transitions. [2022-02-11 00:38:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:38:11,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:38:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:11,256 INFO L225 Difference]: With dead ends: 274 [2022-02-11 00:38:11,257 INFO L226 Difference]: Without dead ends: 274 [2022-02-11 00:38:11,257 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:38:11,258 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:11,258 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-11 00:38:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 124. [2022-02-11 00:38:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2022-02-11 00:38:11,265 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2022-02-11 00:38:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:11,266 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2022-02-11 00:38:11,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2022-02-11 00:38:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:38:11,267 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:11,267 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:11,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:11,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:11,484 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1663020490, now seen corresponding path program 1 times [2022-02-11 00:38:11,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:11,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990592098] [2022-02-11 00:38:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:11,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:11,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:11,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990592098] [2022-02-11 00:38:11,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990592098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 00:38:11,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 00:38:11,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-11 00:38:11,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720033588] [2022-02-11 00:38:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 00:38:11,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-11 00:38:11,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-11 00:38:11,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-11 00:38:11,543 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:11,614 INFO L93 Difference]: Finished difference Result 159 states and 339 transitions. [2022-02-11 00:38:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 00:38:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:38:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:11,615 INFO L225 Difference]: With dead ends: 159 [2022-02-11 00:38:11,615 INFO L226 Difference]: Without dead ends: 149 [2022-02-11 00:38:11,616 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:11,617 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:11,618 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-11 00:38:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2022-02-11 00:38:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2022-02-11 00:38:11,625 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2022-02-11 00:38:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:11,625 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2022-02-11 00:38:11,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2022-02-11 00:38:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-11 00:38:11,630 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:11,630 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:11,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 00:38:11,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash 585178474, now seen corresponding path program 2 times [2022-02-11 00:38:11,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:11,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280486465] [2022-02-11 00:38:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:11,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:11,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280486465] [2022-02-11 00:38:11,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280486465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:11,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419454164] [2022-02-11 00:38:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:11,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:11,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:11,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 00:38:11,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:11,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 00:38:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:11,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:11,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419454164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:11,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:11,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-11 00:38:11,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229991482] [2022-02-11 00:38:11,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:11,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:11,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:11,856 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:11,924 INFO L93 Difference]: Finished difference Result 205 states and 453 transitions. [2022-02-11 00:38:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-11 00:38:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-11 00:38:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:11,925 INFO L225 Difference]: With dead ends: 205 [2022-02-11 00:38:11,925 INFO L226 Difference]: Without dead ends: 205 [2022-02-11 00:38:11,925 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:38:11,926 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:11,926 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-11 00:38:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 125. [2022-02-11 00:38:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2022-02-11 00:38:11,932 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2022-02-11 00:38:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:11,932 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2022-02-11 00:38:11,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2022-02-11 00:38:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:38:11,933 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:11,933 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:11,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-11 00:38:12,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-11 00:38:12,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1679753339, now seen corresponding path program 1 times [2022-02-11 00:38:12,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:12,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635372247] [2022-02-11 00:38:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:12,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:12,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:12,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635372247] [2022-02-11 00:38:12,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635372247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:12,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287230658] [2022-02-11 00:38:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:12,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:12,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:12,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 00:38:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:38:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:12,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-11 00:38:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:12,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:12,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:12,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-11 00:38:12,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:38:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:12,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287230658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:12,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:12,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-02-11 00:38:12,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966930549] [2022-02-11 00:38:12,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:12,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-11 00:38:12,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-11 00:38:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:38:12,813 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:13,072 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2022-02-11 00:38:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:13,073 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:38:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:13,075 INFO L225 Difference]: With dead ends: 441 [2022-02-11 00:38:13,075 INFO L226 Difference]: Without dead ends: 431 [2022-02-11 00:38:13,075 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-02-11 00:38:13,076 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:13,076 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 135 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:38:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-11 00:38:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2022-02-11 00:38:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2022-02-11 00:38:13,083 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2022-02-11 00:38:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:13,083 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2022-02-11 00:38:13,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2022-02-11 00:38:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:38:13,084 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:13,084 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:13,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:13,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:13,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:13,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1612347543, now seen corresponding path program 2 times [2022-02-11 00:38:13,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:13,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235121772] [2022-02-11 00:38:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:13,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:13,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:13,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235121772] [2022-02-11 00:38:13,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235121772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:13,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55143077] [2022-02-11 00:38:13,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:13,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:13,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:13,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 00:38:13,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:13,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:13,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:38:13,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:13,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 00:38:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:13,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:13,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-11 00:38:13,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:38:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:13,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55143077] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:13,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:13,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-02-11 00:38:13,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622205642] [2022-02-11 00:38:13,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:13,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:38:13,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:38:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:38:13,838 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:14,111 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2022-02-11 00:38:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:38:14,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:14,113 INFO L225 Difference]: With dead ends: 432 [2022-02-11 00:38:14,113 INFO L226 Difference]: Without dead ends: 423 [2022-02-11 00:38:14,113 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:38:14,114 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 125 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:14,114 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 118 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:38:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-11 00:38:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2022-02-11 00:38:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2022-02-11 00:38:14,121 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2022-02-11 00:38:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:14,121 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2022-02-11 00:38:14,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2022-02-11 00:38:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:38:14,122 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:14,122 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:14,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:14,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:14,338 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash 144053507, now seen corresponding path program 3 times [2022-02-11 00:38:14,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:14,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92631366] [2022-02-11 00:38:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:14,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:14,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:14,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92631366] [2022-02-11 00:38:14,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92631366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:14,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593254243] [2022-02-11 00:38:14,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:14,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:14,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:14,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 00:38:14,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 00:38:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:38:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:14,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 00:38:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:14,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:14,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:14,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-11 00:38:14,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:38:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:14,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593254243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:14,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:14,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-02-11 00:38:14,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574055525] [2022-02-11 00:38:14,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:14,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-11 00:38:14,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-11 00:38:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-11 00:38:14,757 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:14,895 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2022-02-11 00:38:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:38:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:14,898 INFO L225 Difference]: With dead ends: 440 [2022-02-11 00:38:14,898 INFO L226 Difference]: Without dead ends: 429 [2022-02-11 00:38:14,898 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-02-11 00:38:14,899 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:14,899 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 118 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-02-11 00:38:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2022-02-11 00:38:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2022-02-11 00:38:14,904 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2022-02-11 00:38:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:14,904 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2022-02-11 00:38:14,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2022-02-11 00:38:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:38:14,905 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:14,905 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:15,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:15,121 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2006109563, now seen corresponding path program 4 times [2022-02-11 00:38:15,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:15,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112209678] [2022-02-11 00:38:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:15,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:15,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112209678] [2022-02-11 00:38:15,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112209678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:15,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568744083] [2022-02-11 00:38:15,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:15,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:15,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:15,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 00:38:15,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:15,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:15,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:38:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:15,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-11 00:38:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:15,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:15,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:15,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-11 00:38:15,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:38:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:15,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568744083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:15,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:15,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-02-11 00:38:15,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839666866] [2022-02-11 00:38:15,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:38:15,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:38:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:38:15,460 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:15,660 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2022-02-11 00:38:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:15,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 [2022-02-11 00:38:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:15,662 INFO L225 Difference]: With dead ends: 471 [2022-02-11 00:38:15,662 INFO L226 Difference]: Without dead ends: 462 [2022-02-11 00:38:15,663 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:38:15,663 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:15,663 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 99 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:38:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-02-11 00:38:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2022-02-11 00:38:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2022-02-11 00:38:15,670 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2022-02-11 00:38:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:15,671 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2022-02-11 00:38:15,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2022-02-11 00:38:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:38:15,672 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:15,672 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:15,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:15,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:15,885 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:15,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1668370597, now seen corresponding path program 5 times [2022-02-11 00:38:15,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:15,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412889685] [2022-02-11 00:38:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:15,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:15,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:15,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412889685] [2022-02-11 00:38:15,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412889685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:15,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554581473] [2022-02-11 00:38:15,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:15,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:15,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:15,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 00:38:16,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:38:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:38:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:16,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-11 00:38:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:16,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:16,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:16,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-11 00:38:16,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:38:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:16,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554581473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:16,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:16,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-02-11 00:38:16,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311953662] [2022-02-11 00:38:16,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:16,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:38:16,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:38:16,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:38:16,361 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:16,588 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2022-02-11 00:38:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 [2022-02-11 00:38:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:16,591 INFO L225 Difference]: With dead ends: 472 [2022-02-11 00:38:16,591 INFO L226 Difference]: Without dead ends: 463 [2022-02-11 00:38:16,592 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:38:16,593 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:16,594 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 119 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:38:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-11 00:38:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2022-02-11 00:38:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2022-02-11 00:38:16,600 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2022-02-11 00:38:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:16,601 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2022-02-11 00:38:16,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2022-02-11 00:38:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-11 00:38:16,602 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:16,602 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:16,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-11 00:38:16,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:16,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:16,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1961393531, now seen corresponding path program 6 times [2022-02-11 00:38:16,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:16,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728509079] [2022-02-11 00:38:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:16,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:16,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728509079] [2022-02-11 00:38:16,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728509079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:16,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044882032] [2022-02-11 00:38:16,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:38:16,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:16,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:16,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:16,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 00:38:16,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:38:16,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:16,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 00:38:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:17,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-11 00:38:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:17,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:17,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:17,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-11 00:38:17,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:38:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:17,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044882032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:17,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:17,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-02-11 00:38:17,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95596340] [2022-02-11 00:38:17,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:17,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-11 00:38:17,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:17,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-11 00:38:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-11 00:38:17,322 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:17,558 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2022-02-11 00:38:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-11 00:38:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:17,560 INFO L225 Difference]: With dead ends: 469 [2022-02-11 00:38:17,560 INFO L226 Difference]: Without dead ends: 458 [2022-02-11 00:38:17,560 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-11 00:38:17,561 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:17,561 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 112 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 00:38:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-11 00:38:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2022-02-11 00:38:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2022-02-11 00:38:17,567 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2022-02-11 00:38:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:17,567 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2022-02-11 00:38:17,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2022-02-11 00:38:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:17,569 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:17,569 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:17,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:17,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-11 00:38:17,784 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash 199031744, now seen corresponding path program 7 times [2022-02-11 00:38:17,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:17,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444827901] [2022-02-11 00:38:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:17,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:17,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:17,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444827901] [2022-02-11 00:38:17,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444827901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:17,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172842403] [2022-02-11 00:38:17,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:38:17,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:17,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:17,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:17,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 00:38:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:17,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:17,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:17,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172842403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:17,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:17,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:38:17,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332342950] [2022-02-11 00:38:17,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:17,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:38:17,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:38:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:38:17,946 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:18,061 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2022-02-11 00:38:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 25 [2022-02-11 00:38:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:18,063 INFO L225 Difference]: With dead ends: 475 [2022-02-11 00:38:18,063 INFO L226 Difference]: Without dead ends: 475 [2022-02-11 00:38:18,063 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:38:18,064 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 122 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:18,064 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 107 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-02-11 00:38:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2022-02-11 00:38:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2022-02-11 00:38:18,070 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2022-02-11 00:38:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:18,070 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2022-02-11 00:38:18,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2022-02-11 00:38:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:18,071 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:18,071 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:18,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:18,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:18,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1171876950, now seen corresponding path program 8 times [2022-02-11 00:38:18,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:18,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471882752] [2022-02-11 00:38:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:18,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:18,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471882752] [2022-02-11 00:38:18,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471882752] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:18,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186948104] [2022-02-11 00:38:18,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:18,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:18,314 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:18,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 00:38:18,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:18,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:18,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186948104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:18,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:18,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:38:18,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162736598] [2022-02-11 00:38:18,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:18,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:38:18,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:38:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:38:18,455 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:18,591 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2022-02-11 00:38:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 25 [2022-02-11 00:38:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:18,593 INFO L225 Difference]: With dead ends: 596 [2022-02-11 00:38:18,593 INFO L226 Difference]: Without dead ends: 565 [2022-02-11 00:38:18,594 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:38:18,594 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:18,594 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 52 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-11 00:38:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2022-02-11 00:38:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2022-02-11 00:38:18,603 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2022-02-11 00:38:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:18,605 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2022-02-11 00:38:18,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2022-02-11 00:38:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:18,607 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:18,607 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:18,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:18,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-11 00:38:18,823 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1565100002, now seen corresponding path program 9 times [2022-02-11 00:38:18,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:18,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094085107] [2022-02-11 00:38:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:18,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:18,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094085107] [2022-02-11 00:38:18,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094085107] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:18,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020782574] [2022-02-11 00:38:18,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:18,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:18,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:18,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 00:38:18,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:38:18,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:18,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:18,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020782574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:18,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:18,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:38:18,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062845451] [2022-02-11 00:38:18,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:18,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:18,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:18,971 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:19,055 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2022-02-11 00:38:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:19,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 25 [2022-02-11 00:38:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:19,057 INFO L225 Difference]: With dead ends: 552 [2022-02-11 00:38:19,057 INFO L226 Difference]: Without dead ends: 552 [2022-02-11 00:38:19,057 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:38:19,058 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:19,058 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 58 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-02-11 00:38:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2022-02-11 00:38:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2022-02-11 00:38:19,066 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2022-02-11 00:38:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2022-02-11 00:38:19,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:19,067 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2022-02-11 00:38:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:19,067 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:19,067 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:19,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:19,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-11 00:38:19,286 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2066967746, now seen corresponding path program 10 times [2022-02-11 00:38:19,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:19,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641569970] [2022-02-11 00:38:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:19,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:19,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641569970] [2022-02-11 00:38:19,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641569970] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:19,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797972493] [2022-02-11 00:38:19,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:19,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:19,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:19,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:19,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 00:38:19,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:19,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:19,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797972493] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:19,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:19,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:38:19,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258252380] [2022-02-11 00:38:19,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:19,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:19,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:19,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:19,412 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:19,503 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2022-02-11 00:38:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:38:19,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 25 [2022-02-11 00:38:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:19,505 INFO L225 Difference]: With dead ends: 568 [2022-02-11 00:38:19,505 INFO L226 Difference]: Without dead ends: 565 [2022-02-11 00:38:19,505 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:38:19,506 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:19,506 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 59 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-11 00:38:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2022-02-11 00:38:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2022-02-11 00:38:19,514 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2022-02-11 00:38:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:19,514 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2022-02-11 00:38:19,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2022-02-11 00:38:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:19,515 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:19,515 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:19,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:19,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-11 00:38:19,731 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash 459469306, now seen corresponding path program 11 times [2022-02-11 00:38:19,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:19,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998346355] [2022-02-11 00:38:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:19,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:19,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998346355] [2022-02-11 00:38:19,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998346355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:19,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606035292] [2022-02-11 00:38:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:19,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:19,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:19,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:19,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:38:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:19,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:19,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 00:38:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:19,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:19,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606035292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:19,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:19,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:38:19,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422656822] [2022-02-11 00:38:19,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:19,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:19,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:19,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:19,878 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:19,980 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2022-02-11 00:38:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 25 [2022-02-11 00:38:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:19,983 INFO L225 Difference]: With dead ends: 699 [2022-02-11 00:38:19,983 INFO L226 Difference]: Without dead ends: 699 [2022-02-11 00:38:19,983 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:38:19,983 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:19,984 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 80 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-02-11 00:38:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2022-02-11 00:38:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2022-02-11 00:38:20,009 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2022-02-11 00:38:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:20,009 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2022-02-11 00:38:20,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2022-02-11 00:38:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:20,011 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:20,011 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:20,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:20,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-11 00:38:20,226 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash 961337050, now seen corresponding path program 12 times [2022-02-11 00:38:20,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:20,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778773775] [2022-02-11 00:38:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:20,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:20,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778773775] [2022-02-11 00:38:20,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778773775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:20,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897444206] [2022-02-11 00:38:20,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:38:20,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:20,279 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:20,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 00:38:20,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:38:20,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:20,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:20,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897444206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:20,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:20,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:38:20,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572712830] [2022-02-11 00:38:20,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:20,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:20,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:20,382 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:20,473 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2022-02-11 00:38:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:38:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 25 [2022-02-11 00:38:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:20,476 INFO L225 Difference]: With dead ends: 875 [2022-02-11 00:38:20,476 INFO L226 Difference]: Without dead ends: 872 [2022-02-11 00:38:20,476 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:38:20,477 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:20,477 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 46 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-02-11 00:38:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2022-02-11 00:38:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2022-02-11 00:38:20,491 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2022-02-11 00:38:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:20,491 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2022-02-11 00:38:20,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2022-02-11 00:38:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:20,492 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:20,492 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:20,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:20,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:20,708 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 619914420, now seen corresponding path program 13 times [2022-02-11 00:38:20,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:20,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821461957] [2022-02-11 00:38:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:20,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:20,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821461957] [2022-02-11 00:38:20,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821461957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:20,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137111469] [2022-02-11 00:38:20,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:38:20,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:20,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:20,741 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:20,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 00:38:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:20,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:20,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:20,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:20,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137111469] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:20,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:20,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:38:20,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592733128] [2022-02-11 00:38:20,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:20,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:20,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:20,843 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:20,929 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2022-02-11 00:38:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 25 [2022-02-11 00:38:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:20,932 INFO L225 Difference]: With dead ends: 880 [2022-02-11 00:38:20,932 INFO L226 Difference]: Without dead ends: 880 [2022-02-11 00:38:20,932 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-11 00:38:20,933 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:20,933 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 59 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-02-11 00:38:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2022-02-11 00:38:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2022-02-11 00:38:20,947 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2022-02-11 00:38:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:20,947 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2022-02-11 00:38:20,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2022-02-11 00:38:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:20,949 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:20,949 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:20,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:21,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-11 00:38:21,157 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1526572242, now seen corresponding path program 14 times [2022-02-11 00:38:21,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:21,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55290155] [2022-02-11 00:38:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:21,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:21,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55290155] [2022-02-11 00:38:21,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55290155] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:21,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141683834] [2022-02-11 00:38:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:21,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:21,187 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:21,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 00:38:21,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:21,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:21,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 00:38:21,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141683834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:21,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:21,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 00:38:21,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478672786] [2022-02-11 00:38:21,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:21,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 00:38:21,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 00:38:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-11 00:38:21,301 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:21,408 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2022-02-11 00:38:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-11 00:38:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 25 [2022-02-11 00:38:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:21,411 INFO L225 Difference]: With dead ends: 810 [2022-02-11 00:38:21,411 INFO L226 Difference]: Without dead ends: 806 [2022-02-11 00:38:21,411 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-11 00:38:21,412 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:21,412 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 52 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-02-11 00:38:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2022-02-11 00:38:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2022-02-11 00:38:21,422 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2022-02-11 00:38:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:21,422 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2022-02-11 00:38:21,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2022-02-11 00:38:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2022-02-11 00:38:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:21,423 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:21,423 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:21,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-11 00:38:21,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-11 00:38:21,645 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash 190722878, now seen corresponding path program 15 times [2022-02-11 00:38:21,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:21,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166899432] [2022-02-11 00:38:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:21,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:21,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:21,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166899432] [2022-02-11 00:38:21,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166899432] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:21,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093896292] [2022-02-11 00:38:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:21,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:21,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:21,684 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:21,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 00:38:21,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:38:21,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:21,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093896292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:21,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:21,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:38:21,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871750406] [2022-02-11 00:38:21,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:21,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:38:21,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:38:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:38:21,799 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:21,906 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2022-02-11 00:38:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:21,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 25 [2022-02-11 00:38:21,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:21,909 INFO L225 Difference]: With dead ends: 795 [2022-02-11 00:38:21,909 INFO L226 Difference]: Without dead ends: 795 [2022-02-11 00:38:21,909 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-11 00:38:21,910 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:21,910 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 75 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-11 00:38:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2022-02-11 00:38:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2022-02-11 00:38:21,920 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2022-02-11 00:38:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:21,920 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2022-02-11 00:38:21,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2022-02-11 00:38:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-11 00:38:21,921 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:21,921 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:21,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-11 00:38:22,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:22,137 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1589266240, now seen corresponding path program 16 times [2022-02-11 00:38:22,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:22,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532674780] [2022-02-11 00:38:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:22,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:22,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532674780] [2022-02-11 00:38:22,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532674780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:22,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549742560] [2022-02-11 00:38:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:22,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:22,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:22,184 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:22,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 00:38:22,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:22,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:22,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 00:38:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:22,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:22,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549742560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:22,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:22,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-11 00:38:22,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505663050] [2022-02-11 00:38:22,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:22,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-11 00:38:22,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-11 00:38:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-11 00:38:22,305 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:22,406 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2022-02-11 00:38:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-11 00:38:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 25 [2022-02-11 00:38:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:22,409 INFO L225 Difference]: With dead ends: 856 [2022-02-11 00:38:22,409 INFO L226 Difference]: Without dead ends: 835 [2022-02-11 00:38:22,409 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-11 00:38:22,409 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 148 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:22,409 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 50 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-11 00:38:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-11 00:38:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2022-02-11 00:38:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2022-02-11 00:38:22,420 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2022-02-11 00:38:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:22,420 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2022-02-11 00:38:22,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2022-02-11 00:38:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2022-02-11 00:38:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:22,421 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:22,422 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:22,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:22,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:22,637 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1761346971, now seen corresponding path program 17 times [2022-02-11 00:38:22,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:22,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069755620] [2022-02-11 00:38:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:22,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:22,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:22,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069755620] [2022-02-11 00:38:22,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069755620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:22,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521403529] [2022-02-11 00:38:22,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:22,988 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:22,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 00:38:23,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:38:23,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:23,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:23,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:38:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:23,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:23,603 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:23,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:38:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:23,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:38:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:23,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521403529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:23,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:23,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:38:23,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370951950] [2022-02-11 00:38:23,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:38:23,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:38:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:38:23,709 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:25,109 INFO L93 Difference]: Finished difference Result 2072 states and 5024 transitions. [2022-02-11 00:38:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:38:25,110 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:25,116 INFO L225 Difference]: With dead ends: 2072 [2022-02-11 00:38:25,116 INFO L226 Difference]: Without dead ends: 2062 [2022-02-11 00:38:25,117 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:38:25,117 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 384 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:25,117 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 252 Invalid, 2371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:38:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-02-11 00:38:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 773. [2022-02-11 00:38:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2022-02-11 00:38:25,136 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2022-02-11 00:38:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:25,136 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2022-02-11 00:38:25,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2022-02-11 00:38:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:25,138 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:25,138 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:25,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:25,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:25,354 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1956939167, now seen corresponding path program 18 times [2022-02-11 00:38:25,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:25,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147485344] [2022-02-11 00:38:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:25,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:25,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:25,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147485344] [2022-02-11 00:38:25,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147485344] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:25,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100485150] [2022-02-11 00:38:25,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:38:25,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:25,666 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:25,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 00:38:25,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:38:25,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:25,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:25,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:38:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:26,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:26,277 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:26,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:38:26,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:26,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:26,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:38:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:26,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100485150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:26,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:26,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:38:26,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052009220] [2022-02-11 00:38:26,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:26,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:26,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:26,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:26,381 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:27,418 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2022-02-11 00:38:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:38:27,418 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:27,425 INFO L225 Difference]: With dead ends: 2173 [2022-02-11 00:38:27,425 INFO L226 Difference]: Without dead ends: 2162 [2022-02-11 00:38:27,426 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:38:27,426 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 231 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:27,426 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 203 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:38:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2022-02-11 00:38:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2022-02-11 00:38:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2022-02-11 00:38:27,446 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2022-02-11 00:38:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:27,446 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2022-02-11 00:38:27,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2022-02-11 00:38:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:27,447 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:27,447 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:27,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:27,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-11 00:38:27,663 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash -581627079, now seen corresponding path program 19 times [2022-02-11 00:38:27,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:27,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419980055] [2022-02-11 00:38:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:27,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:27,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419980055] [2022-02-11 00:38:27,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419980055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:27,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306713092] [2022-02-11 00:38:27,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:38:27,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:27,989 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:27,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 00:38:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:28,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:28,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:38:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:28,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:28,594 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:28,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:38:28,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:28,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:28,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:38:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:28,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306713092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:28,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:28,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:38:28,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963037043] [2022-02-11 00:38:28,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:28,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:28,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:28,698 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:29,738 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2022-02-11 00:38:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:38:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:29,745 INFO L225 Difference]: With dead ends: 2310 [2022-02-11 00:38:29,745 INFO L226 Difference]: Without dead ends: 2290 [2022-02-11 00:38:29,746 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 00:38:29,746 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 280 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:29,746 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 212 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:38:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-02-11 00:38:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2022-02-11 00:38:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2022-02-11 00:38:29,764 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2022-02-11 00:38:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:29,764 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2022-02-11 00:38:29,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2022-02-11 00:38:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:29,765 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:29,765 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:29,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:29,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-11 00:38:29,979 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2142000305, now seen corresponding path program 20 times [2022-02-11 00:38:29,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:29,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635870547] [2022-02-11 00:38:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:30,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:30,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635870547] [2022-02-11 00:38:30,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635870547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:30,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63631991] [2022-02-11 00:38:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:30,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:30,245 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:30,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 00:38:30,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:30,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:30,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:38:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:30,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:30,779 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:30,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:38:30,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:30,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:30,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:38:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:30,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63631991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:30,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:30,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:38:30,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874274008] [2022-02-11 00:38:30,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:30,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:38:30,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:38:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:38:30,884 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:32,412 INFO L93 Difference]: Finished difference Result 2232 states and 5402 transitions. [2022-02-11 00:38:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:38:32,412 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:32,419 INFO L225 Difference]: With dead ends: 2232 [2022-02-11 00:38:32,419 INFO L226 Difference]: Without dead ends: 2209 [2022-02-11 00:38:32,420 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 00:38:32,420 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 372 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:32,420 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 268 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:38:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-02-11 00:38:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 800. [2022-02-11 00:38:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2022-02-11 00:38:32,437 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2022-02-11 00:38:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:32,437 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2022-02-11 00:38:32,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2022-02-11 00:38:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:32,438 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:32,438 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:32,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:32,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:32,654 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash 828755281, now seen corresponding path program 21 times [2022-02-11 00:38:32,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:32,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849594527] [2022-02-11 00:38:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:32,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:32,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:32,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849594527] [2022-02-11 00:38:32,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849594527] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:32,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747085632] [2022-02-11 00:38:32,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:32,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:32,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:32,953 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:32,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 00:38:32,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:38:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:32,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 00:38:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:33,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:33,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:38:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:33,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:34,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:34,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:34,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:34,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-11 00:38:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:34,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747085632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:34,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:34,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-02-11 00:38:34,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457225790] [2022-02-11 00:38:34,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:34,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:38:34,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:34,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:38:34,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:38:34,239 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:35,540 INFO L93 Difference]: Finished difference Result 2051 states and 4946 transitions. [2022-02-11 00:38:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:38:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:35,545 INFO L225 Difference]: With dead ends: 2051 [2022-02-11 00:38:35,545 INFO L226 Difference]: Without dead ends: 2043 [2022-02-11 00:38:35,546 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=465, Invalid=2727, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:38:35,546 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 463 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:35,546 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 270 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 959 Invalid, 0 Unknown, 1147 Unchecked, 0.5s Time] [2022-02-11 00:38:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-02-11 00:38:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 868. [2022-02-11 00:38:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.364475201845444) internal successors, (2050), 867 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2050 transitions. [2022-02-11 00:38:35,562 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2050 transitions. Word has length 29 [2022-02-11 00:38:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:35,562 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2050 transitions. [2022-02-11 00:38:35,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2050 transitions. [2022-02-11 00:38:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:35,576 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:35,576 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:35,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:35,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:35,791 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:35,792 INFO L85 PathProgramCache]: Analyzing trace with hash -882143023, now seen corresponding path program 22 times [2022-02-11 00:38:35,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:35,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747885693] [2022-02-11 00:38:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:35,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:36,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:36,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747885693] [2022-02-11 00:38:36,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747885693] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:36,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642924809] [2022-02-11 00:38:36,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:36,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:36,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:36,101 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:36,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 00:38:36,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:36,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:36,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:38:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:36,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:36,738 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:36,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:38:36,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:36,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:36,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:38:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:36,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642924809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:36,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:36,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:38:36,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787579304] [2022-02-11 00:38:36,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:36,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:38:36,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:36,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:38:36,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:38:36,874 INFO L87 Difference]: Start difference. First operand 868 states and 2050 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:38,139 INFO L93 Difference]: Finished difference Result 2139 states and 5175 transitions. [2022-02-11 00:38:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:38:38,139 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:38,144 INFO L225 Difference]: With dead ends: 2139 [2022-02-11 00:38:38,144 INFO L226 Difference]: Without dead ends: 2127 [2022-02-11 00:38:38,145 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-02-11 00:38:38,145 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 339 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:38,145 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 235 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:38:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-02-11 00:38:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 800. [2022-02-11 00:38:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2022-02-11 00:38:38,163 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2022-02-11 00:38:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:38,163 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2022-02-11 00:38:38,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2022-02-11 00:38:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:38,165 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:38,165 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:38,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:38,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-11 00:38:38,381 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1822474267, now seen corresponding path program 23 times [2022-02-11 00:38:38,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:38,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275078085] [2022-02-11 00:38:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:38,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:38,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275078085] [2022-02-11 00:38:38,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275078085] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:38,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335101882] [2022-02-11 00:38:38,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:38:38,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:38,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:38,660 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:38,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 00:38:38,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:38:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:38,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:38:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:39,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:39,232 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:39,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:38:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:39,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:38:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:39,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335101882] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:39,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:39,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-02-11 00:38:39,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539271233] [2022-02-11 00:38:39,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:39,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:39,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:39,333 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:41,207 INFO L93 Difference]: Finished difference Result 2311 states and 5676 transitions. [2022-02-11 00:38:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:38:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:41,211 INFO L225 Difference]: With dead ends: 2311 [2022-02-11 00:38:41,211 INFO L226 Difference]: Without dead ends: 2300 [2022-02-11 00:38:41,212 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=2638, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:38:41,215 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 297 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:41,216 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 220 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:38:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-02-11 00:38:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 852. [2022-02-11 00:38:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.383078730904818) internal successors, (2028), 851 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2028 transitions. [2022-02-11 00:38:41,254 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2028 transitions. Word has length 29 [2022-02-11 00:38:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:41,255 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2028 transitions. [2022-02-11 00:38:41,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2028 transitions. [2022-02-11 00:38:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:41,256 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:41,256 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:41,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-11 00:38:41,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-11 00:38:41,478 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1852005893, now seen corresponding path program 24 times [2022-02-11 00:38:41,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:41,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260909118] [2022-02-11 00:38:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:41,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:41,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:41,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260909118] [2022-02-11 00:38:41,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260909118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:41,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107348006] [2022-02-11 00:38:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:38:41,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:41,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:41,808 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:41,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 00:38:41,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:38:41,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:42,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:38:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:42,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:42,431 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:42,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:38:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:42,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:38:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:42,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107348006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:42,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:42,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-02-11 00:38:42,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382269815] [2022-02-11 00:38:42,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:42,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:38:42,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:42,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:38:42,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:38:42,536 INFO L87 Difference]: Start difference. First operand 852 states and 2028 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:43,952 INFO L93 Difference]: Finished difference Result 2417 states and 5971 transitions. [2022-02-11 00:38:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:38:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:43,956 INFO L225 Difference]: With dead ends: 2417 [2022-02-11 00:38:43,957 INFO L226 Difference]: Without dead ends: 2402 [2022-02-11 00:38:43,957 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:38:43,958 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:43,958 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 175 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:38:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-02-11 00:38:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 864. [2022-02-11 00:38:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.384704519119351) internal successors, (2058), 863 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2058 transitions. [2022-02-11 00:38:43,977 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2058 transitions. Word has length 29 [2022-02-11 00:38:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:43,977 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2058 transitions. [2022-02-11 00:38:43,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:43,977 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2058 transitions. [2022-02-11 00:38:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:43,978 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:43,979 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:43,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:44,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-11 00:38:44,183 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1777758235, now seen corresponding path program 25 times [2022-02-11 00:38:44,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:44,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614284053] [2022-02-11 00:38:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:44,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:44,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614284053] [2022-02-11 00:38:44,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614284053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:44,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558744860] [2022-02-11 00:38:44,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:38:44,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:44,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:44,426 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:44,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 00:38:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:44,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:38:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:44,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:44,970 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:44,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:38:45,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:45,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:45,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:38:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:45,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558744860] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:45,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:45,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-02-11 00:38:45,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153718302] [2022-02-11 00:38:45,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:45,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 00:38:45,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 00:38:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-11 00:38:45,054 INFO L87 Difference]: Start difference. First operand 864 states and 2058 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:46,653 INFO L93 Difference]: Finished difference Result 2652 states and 6552 transitions. [2022-02-11 00:38:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:38:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:46,682 INFO L225 Difference]: With dead ends: 2652 [2022-02-11 00:38:46,683 INFO L226 Difference]: Without dead ends: 2619 [2022-02-11 00:38:46,684 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=522, Invalid=3260, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:38:46,688 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 345 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:46,689 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 206 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:38:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2022-02-11 00:38:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 851. [2022-02-11 00:38:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 2.3835294117647057) internal successors, (2026), 850 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2026 transitions. [2022-02-11 00:38:46,711 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2026 transitions. Word has length 29 [2022-02-11 00:38:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:46,712 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2026 transitions. [2022-02-11 00:38:46,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2026 transitions. [2022-02-11 00:38:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:46,713 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:46,713 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:46,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:46,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-11 00:38:46,927 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash 709848259, now seen corresponding path program 26 times [2022-02-11 00:38:46,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:46,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663077819] [2022-02-11 00:38:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:46,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:47,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:47,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663077819] [2022-02-11 00:38:47,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663077819] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:47,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907574831] [2022-02-11 00:38:47,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:38:47,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:47,216 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:47,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 00:38:47,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:38:47,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:47,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:38:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:47,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:38:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:47,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:47,738 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:47,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:38:47,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:47,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:47,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:47,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:38:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:47,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907574831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:47,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:47,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:38:47,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633178516] [2022-02-11 00:38:47,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:47,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:38:47,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:38:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:38:47,821 INFO L87 Difference]: Start difference. First operand 851 states and 2026 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:49,614 INFO L93 Difference]: Finished difference Result 2315 states and 5704 transitions. [2022-02-11 00:38:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:38:49,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:49,618 INFO L225 Difference]: With dead ends: 2315 [2022-02-11 00:38:49,618 INFO L226 Difference]: Without dead ends: 2304 [2022-02-11 00:38:49,619 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=442, Invalid=2528, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:38:49,620 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 353 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:49,620 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 177 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:38:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-02-11 00:38:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 872. [2022-02-11 00:38:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.388059701492537) internal successors, (2080), 871 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2080 transitions. [2022-02-11 00:38:49,637 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2080 transitions. Word has length 29 [2022-02-11 00:38:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:49,637 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 2080 transitions. [2022-02-11 00:38:49,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2080 transitions. [2022-02-11 00:38:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:49,638 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:49,638 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:49,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:49,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:49,854 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1828717987, now seen corresponding path program 27 times [2022-02-11 00:38:49,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:49,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069514393] [2022-02-11 00:38:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:50,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:50,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069514393] [2022-02-11 00:38:50,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069514393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:50,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390077085] [2022-02-11 00:38:50,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:38:50,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:50,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:50,138 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:50,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 00:38:50,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:38:50,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:50,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:38:50,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:50,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:50,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:50,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 44 [2022-02-11 00:38:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:50,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:51,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:38:51,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2022-02-11 00:38:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:51,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390077085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:51,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:51,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 35 [2022-02-11 00:38:51,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519690348] [2022-02-11 00:38:51,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:51,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:38:51,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:38:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:38:51,377 INFO L87 Difference]: Start difference. First operand 872 states and 2080 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:38:56,005 INFO L93 Difference]: Finished difference Result 3328 states and 8265 transitions. [2022-02-11 00:38:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-11 00:38:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:38:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:38:56,010 INFO L225 Difference]: With dead ends: 3328 [2022-02-11 00:38:56,010 INFO L226 Difference]: Without dead ends: 3310 [2022-02-11 00:38:56,013 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2064, Invalid=10146, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 00:38:56,013 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 445 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 953 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:38:56,013 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 208 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2055 Invalid, 0 Unknown, 953 Unchecked, 1.1s Time] [2022-02-11 00:38:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2022-02-11 00:38:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 941. [2022-02-11 00:38:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.4063829787234043) internal successors, (2262), 940 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2262 transitions. [2022-02-11 00:38:56,043 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2262 transitions. Word has length 29 [2022-02-11 00:38:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:38:56,043 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 2262 transitions. [2022-02-11 00:38:56,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:38:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2262 transitions. [2022-02-11 00:38:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:38:56,044 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:38:56,044 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:38:56,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 00:38:56,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:56,275 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:38:56,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:38:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1548299119, now seen corresponding path program 28 times [2022-02-11 00:38:56,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:38:56,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115406121] [2022-02-11 00:38:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:38:56,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:38:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:38:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:56,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:38:56,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115406121] [2022-02-11 00:38:56,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115406121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:38:56,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507204811] [2022-02-11 00:38:56,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:38:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:38:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:38:56,587 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:38:56,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 00:38:56,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:38:56,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:38:56,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:38:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:38:56,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:38:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:56,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:38:57,215 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:38:57,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:38:57,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:57,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:38:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:38:57,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:38:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:38:57,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507204811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:38:57,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:38:57,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:38:57,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974404738] [2022-02-11 00:38:57,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:38:57,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:38:57,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:38:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:38:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:38:57,321 INFO L87 Difference]: Start difference. First operand 941 states and 2262 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:00,357 INFO L93 Difference]: Finished difference Result 2951 states and 7228 transitions. [2022-02-11 00:39:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:39:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:00,361 INFO L225 Difference]: With dead ends: 2951 [2022-02-11 00:39:00,361 INFO L226 Difference]: Without dead ends: 2896 [2022-02-11 00:39:00,362 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1003, Invalid=5159, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 00:39:00,362 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 565 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:00,362 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 165 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:39:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2022-02-11 00:39:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 858. [2022-02-11 00:39:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.382730455075846) internal successors, (2042), 857 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2042 transitions. [2022-02-11 00:39:00,378 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2042 transitions. Word has length 29 [2022-02-11 00:39:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:00,379 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2042 transitions. [2022-02-11 00:39:00,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2042 transitions. [2022-02-11 00:39:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:00,380 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:00,380 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:00,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:00,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-02-11 00:39:00,594 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash -299763919, now seen corresponding path program 29 times [2022-02-11 00:39:00,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:00,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220142509] [2022-02-11 00:39:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:00,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:00,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220142509] [2022-02-11 00:39:00,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220142509] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:00,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756302033] [2022-02-11 00:39:00,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:39:00,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:00,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:00,898 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:00,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 00:39:00,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:39:00,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:00,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:01,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:39:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:01,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:01,320 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:01,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:01,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:01,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756302033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:01,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:01,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:39:01,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847255708] [2022-02-11 00:39:01,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:01,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:39:01,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:39:01,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:39:01,391 INFO L87 Difference]: Start difference. First operand 858 states and 2042 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:03,137 INFO L93 Difference]: Finished difference Result 2305 states and 5582 transitions. [2022-02-11 00:39:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:39:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:03,140 INFO L225 Difference]: With dead ends: 2305 [2022-02-11 00:39:03,140 INFO L226 Difference]: Without dead ends: 2263 [2022-02-11 00:39:03,141 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=576, Invalid=3330, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:39:03,141 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 510 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:03,141 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 195 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:39:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-02-11 00:39:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 849. [2022-02-11 00:39:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.3797169811320753) internal successors, (2018), 848 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2018 transitions. [2022-02-11 00:39:03,169 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2018 transitions. Word has length 29 [2022-02-11 00:39:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:03,169 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 2018 transitions. [2022-02-11 00:39:03,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2018 transitions. [2022-02-11 00:39:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:03,171 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:03,171 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:03,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:03,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:03,386 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -724305229, now seen corresponding path program 30 times [2022-02-11 00:39:03,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:03,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10004901] [2022-02-11 00:39:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:03,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:03,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10004901] [2022-02-11 00:39:03,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10004901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:03,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363082766] [2022-02-11 00:39:03,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:03,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:03,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:03,617 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:03,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 00:39:03,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:39:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:03,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:39:03,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:03,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:03,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-02-11 00:39:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:04,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:04,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:04,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:04,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:39:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:05,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363082766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:05,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:05,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-11 00:39:05,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269255320] [2022-02-11 00:39:05,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:05,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:39:05,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:39:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:39:05,019 INFO L87 Difference]: Start difference. First operand 849 states and 2018 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:06,603 INFO L93 Difference]: Finished difference Result 1533 states and 3690 transitions. [2022-02-11 00:39:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:39:06,604 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:06,605 INFO L225 Difference]: With dead ends: 1533 [2022-02-11 00:39:06,606 INFO L226 Difference]: Without dead ends: 1522 [2022-02-11 00:39:06,606 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=570, Invalid=2736, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:39:06,606 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 335 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1393 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:06,606 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 144 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 766 Invalid, 0 Unknown, 1393 Unchecked, 0.4s Time] [2022-02-11 00:39:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-02-11 00:39:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 887. [2022-02-11 00:39:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.3905191873589167) internal successors, (2118), 886 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2118 transitions. [2022-02-11 00:39:06,617 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2118 transitions. Word has length 29 [2022-02-11 00:39:06,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:06,618 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2118 transitions. [2022-02-11 00:39:06,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2118 transitions. [2022-02-11 00:39:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:06,619 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:06,619 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:06,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-11 00:39:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:06,820 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1032095821, now seen corresponding path program 31 times [2022-02-11 00:39:06,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:06,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764696952] [2022-02-11 00:39:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:07,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:07,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764696952] [2022-02-11 00:39:07,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764696952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:07,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645988812] [2022-02-11 00:39:07,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:39:07,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:07,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:07,105 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:07,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 00:39:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:07,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:39:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:07,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:07,723 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:07,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:07,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:07,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:07,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:07,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645988812] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:07,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:07,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:39:07,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320599847] [2022-02-11 00:39:07,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:39:07,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:39:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:39:07,815 INFO L87 Difference]: Start difference. First operand 887 states and 2118 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:09,674 INFO L93 Difference]: Finished difference Result 2979 states and 7351 transitions. [2022-02-11 00:39:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:39:09,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:09,678 INFO L225 Difference]: With dead ends: 2979 [2022-02-11 00:39:09,678 INFO L226 Difference]: Without dead ends: 2950 [2022-02-11 00:39:09,679 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=511, Invalid=3029, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:39:09,679 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 442 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:09,679 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 234 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:39:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2022-02-11 00:39:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 912. [2022-02-11 00:39:09,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.3918770581778266) internal successors, (2179), 911 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2179 transitions. [2022-02-11 00:39:09,697 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2179 transitions. Word has length 29 [2022-02-11 00:39:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:09,697 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2179 transitions. [2022-02-11 00:39:09,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2179 transitions. [2022-02-11 00:39:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:09,699 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:09,699 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:09,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:09,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-11 00:39:09,910 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash -539244091, now seen corresponding path program 32 times [2022-02-11 00:39:09,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:09,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134433907] [2022-02-11 00:39:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:09,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:10,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:10,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134433907] [2022-02-11 00:39:10,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134433907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:10,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865557715] [2022-02-11 00:39:10,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:39:10,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:10,156 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:10,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 00:39:10,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:10,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:10,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:39:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:10,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:10,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2022-02-11 00:39:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:10,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:11,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:11,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:11,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:11,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:39:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:11,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865557715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:11,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:11,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-02-11 00:39:11,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406070060] [2022-02-11 00:39:11,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:11,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:39:11,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:39:11,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:39:11,135 INFO L87 Difference]: Start difference. First operand 912 states and 2179 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:12,814 INFO L93 Difference]: Finished difference Result 2296 states and 5620 transitions. [2022-02-11 00:39:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:39:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:12,822 INFO L225 Difference]: With dead ends: 2296 [2022-02-11 00:39:12,822 INFO L226 Difference]: Without dead ends: 2283 [2022-02-11 00:39:12,823 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=898, Invalid=3932, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:39:12,823 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 423 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1483 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:12,824 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 231 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1007 Invalid, 0 Unknown, 1483 Unchecked, 0.4s Time] [2022-02-11 00:39:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-02-11 00:39:12,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 957. [2022-02-11 00:39:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.403765690376569) internal successors, (2298), 956 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2298 transitions. [2022-02-11 00:39:12,859 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2298 transitions. Word has length 29 [2022-02-11 00:39:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:12,859 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2298 transitions. [2022-02-11 00:39:12,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2298 transitions. [2022-02-11 00:39:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:12,860 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:12,860 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:12,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-11 00:39:13,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-11 00:39:13,067 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:13,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1852489115, now seen corresponding path program 33 times [2022-02-11 00:39:13,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:13,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592111524] [2022-02-11 00:39:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:13,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:13,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:13,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592111524] [2022-02-11 00:39:13,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592111524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:13,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087200018] [2022-02-11 00:39:13,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:39:13,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:13,372 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:13,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 00:39:13,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:39:13,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:13,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:13,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:13,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:39:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:13,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:13,954 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:13,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:14,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:14,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:14,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:14,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:14,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087200018] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:14,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:14,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:39:14,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125964709] [2022-02-11 00:39:14,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:14,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:39:14,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:39:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:39:14,056 INFO L87 Difference]: Start difference. First operand 957 states and 2298 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:15,584 INFO L93 Difference]: Finished difference Result 2414 states and 5888 transitions. [2022-02-11 00:39:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:39:15,584 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:15,587 INFO L225 Difference]: With dead ends: 2414 [2022-02-11 00:39:15,588 INFO L226 Difference]: Without dead ends: 2401 [2022-02-11 00:39:15,588 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=2124, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:39:15,588 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 323 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:15,588 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 295 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:39:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-02-11 00:39:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 959. [2022-02-11 00:39:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.403966597077244) internal successors, (2303), 958 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2303 transitions. [2022-02-11 00:39:15,604 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2303 transitions. Word has length 29 [2022-02-11 00:39:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:15,604 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2303 transitions. [2022-02-11 00:39:15,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2303 transitions. [2022-02-11 00:39:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:15,605 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:15,605 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:15,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-11 00:39:15,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-11 00:39:15,808 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:15,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1357085963, now seen corresponding path program 34 times [2022-02-11 00:39:15,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:15,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96143364] [2022-02-11 00:39:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:16,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:16,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96143364] [2022-02-11 00:39:16,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96143364] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:16,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20222027] [2022-02-11 00:39:16,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:39:16,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:16,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:16,116 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:16,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 00:39:16,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:39:16,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:16,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:16,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:39:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:16,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:16,734 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:16,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:16,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:16,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:16,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:16,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20222027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:16,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:16,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-02-11 00:39:16,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342144643] [2022-02-11 00:39:16,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:16,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:39:16,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:39:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:39:16,821 INFO L87 Difference]: Start difference. First operand 959 states and 2303 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:19,013 INFO L93 Difference]: Finished difference Result 2934 states and 7080 transitions. [2022-02-11 00:39:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:39:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:19,017 INFO L225 Difference]: With dead ends: 2934 [2022-02-11 00:39:19,017 INFO L226 Difference]: Without dead ends: 2881 [2022-02-11 00:39:19,018 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=516, Invalid=3266, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:39:19,018 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 412 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:19,018 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 358 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2653 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:39:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2022-02-11 00:39:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 915. [2022-02-11 00:39:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.3916849015317285) internal successors, (2186), 914 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2186 transitions. [2022-02-11 00:39:19,034 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2186 transitions. Word has length 29 [2022-02-11 00:39:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:19,034 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2186 transitions. [2022-02-11 00:39:19,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2186 transitions. [2022-02-11 00:39:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:19,036 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:19,036 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:19,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:19,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:19,251 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash 262678323, now seen corresponding path program 35 times [2022-02-11 00:39:19,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:19,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324614872] [2022-02-11 00:39:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:19,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:19,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:19,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324614872] [2022-02-11 00:39:19,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324614872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:19,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15235046] [2022-02-11 00:39:19,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:39:19,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:19,525 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:19,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 00:39:19,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:39:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:19,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:39:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:19,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:20,149 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:20,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:39:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:20,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:39:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:20,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15235046] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:20,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:20,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-02-11 00:39:20,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797164882] [2022-02-11 00:39:20,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:20,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 00:39:20,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 00:39:20,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-11 00:39:20,258 INFO L87 Difference]: Start difference. First operand 915 states and 2186 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:22,129 INFO L93 Difference]: Finished difference Result 2654 states and 6554 transitions. [2022-02-11 00:39:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:39:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:22,133 INFO L225 Difference]: With dead ends: 2654 [2022-02-11 00:39:22,133 INFO L226 Difference]: Without dead ends: 2629 [2022-02-11 00:39:22,134 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:39:22,134 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 294 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:22,134 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 268 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:39:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2022-02-11 00:39:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 908. [2022-02-11 00:39:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.3914002205071663) internal successors, (2169), 907 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2169 transitions. [2022-02-11 00:39:22,150 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2169 transitions. Word has length 29 [2022-02-11 00:39:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:22,151 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2169 transitions. [2022-02-11 00:39:22,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2169 transitions. [2022-02-11 00:39:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:22,152 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:22,152 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:22,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:22,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 00:39:22,368 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:22,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1014151221, now seen corresponding path program 36 times [2022-02-11 00:39:22,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:22,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228747935] [2022-02-11 00:39:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:22,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:22,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:22,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228747935] [2022-02-11 00:39:22,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228747935] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:22,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918140644] [2022-02-11 00:39:22,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:22,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:22,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:22,688 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:22,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 00:39:22,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:39:22,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:22,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:23,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:39:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:23,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:23,259 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:23,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:39:23,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:23,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:39:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:23,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918140644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:23,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:23,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:39:23,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879445774] [2022-02-11 00:39:23,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:23,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:23,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:23,343 INFO L87 Difference]: Start difference. First operand 908 states and 2169 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:25,549 INFO L93 Difference]: Finished difference Result 2349 states and 5753 transitions. [2022-02-11 00:39:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:39:25,549 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:25,553 INFO L225 Difference]: With dead ends: 2349 [2022-02-11 00:39:25,553 INFO L226 Difference]: Without dead ends: 2320 [2022-02-11 00:39:25,553 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=3253, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:39:25,553 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 356 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:25,553 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 262 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:39:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2022-02-11 00:39:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 949. [2022-02-11 00:39:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3966244725738397) internal successors, (2272), 948 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2272 transitions. [2022-02-11 00:39:25,570 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2272 transitions. Word has length 29 [2022-02-11 00:39:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:25,570 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 2272 transitions. [2022-02-11 00:39:25,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2272 transitions. [2022-02-11 00:39:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:25,571 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:25,571 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:25,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:25,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-11 00:39:25,787 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1287822959, now seen corresponding path program 37 times [2022-02-11 00:39:25,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:25,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265304925] [2022-02-11 00:39:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:26,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:26,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265304925] [2022-02-11 00:39:26,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265304925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:26,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816019366] [2022-02-11 00:39:26,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:39:26,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:26,099 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:26,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 00:39:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:26,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:26,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:26,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:39:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:26,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:26,738 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:26,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:39:26,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:26,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:39:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:26,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816019366] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:26,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:26,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:39:26,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270055025] [2022-02-11 00:39:26,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:26,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:26,839 INFO L87 Difference]: Start difference. First operand 949 states and 2272 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:28,655 INFO L93 Difference]: Finished difference Result 2959 states and 7321 transitions. [2022-02-11 00:39:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:39:28,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:28,659 INFO L225 Difference]: With dead ends: 2959 [2022-02-11 00:39:28,659 INFO L226 Difference]: Without dead ends: 2936 [2022-02-11 00:39:28,660 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=648, Invalid=3908, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:39:28,661 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 344 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:28,661 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 197 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:39:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-02-11 00:39:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 961. [2022-02-11 00:39:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 2.396875) internal successors, (2301), 960 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 2301 transitions. [2022-02-11 00:39:28,697 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 2301 transitions. Word has length 29 [2022-02-11 00:39:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:28,697 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 2301 transitions. [2022-02-11 00:39:28,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 2301 transitions. [2022-02-11 00:39:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:28,698 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:28,698 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:28,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:28,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:28,899 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1953026127, now seen corresponding path program 38 times [2022-02-11 00:39:28,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:28,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549366285] [2022-02-11 00:39:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:28,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:29,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:29,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549366285] [2022-02-11 00:39:29,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549366285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:29,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884398374] [2022-02-11 00:39:29,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:39:29,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:29,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:29,206 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:29,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 00:39:29,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:29,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:29,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:39:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:29,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:29,662 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:29,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:29,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:29,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:29,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:29,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:29,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884398374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:29,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:29,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:39:29,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578026242] [2022-02-11 00:39:29,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:29,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:29,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:29,756 INFO L87 Difference]: Start difference. First operand 961 states and 2301 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:31,859 INFO L93 Difference]: Finished difference Result 2579 states and 6380 transitions. [2022-02-11 00:39:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:39:31,859 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:31,862 INFO L225 Difference]: With dead ends: 2579 [2022-02-11 00:39:31,863 INFO L226 Difference]: Without dead ends: 2556 [2022-02-11 00:39:31,863 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=598, Invalid=3434, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:39:31,863 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 335 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:31,863 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 203 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:39:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-02-11 00:39:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 980. [2022-02-11 00:39:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.4096016343207354) internal successors, (2359), 979 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2359 transitions. [2022-02-11 00:39:31,879 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2359 transitions. Word has length 29 [2022-02-11 00:39:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:31,879 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 2359 transitions. [2022-02-11 00:39:31,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2359 transitions. [2022-02-11 00:39:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:31,880 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:31,880 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:31,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:32,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-11 00:39:32,095 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1441520993, now seen corresponding path program 39 times [2022-02-11 00:39:32,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:32,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760419481] [2022-02-11 00:39:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:32,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:32,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760419481] [2022-02-11 00:39:32,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760419481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:32,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444642425] [2022-02-11 00:39:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:39:32,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:32,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:32,312 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:32,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 00:39:32,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:39:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:32,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:39:32,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:32,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:32,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-02-11 00:39:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:32,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:33,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:33,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2022-02-11 00:39:33,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:39:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:33,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444642425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:33,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:33,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 34 [2022-02-11 00:39:33,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934720078] [2022-02-11 00:39:33,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:33,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:39:33,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:39:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:39:33,113 INFO L87 Difference]: Start difference. First operand 980 states and 2359 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:36,456 INFO L93 Difference]: Finished difference Result 2193 states and 5528 transitions. [2022-02-11 00:39:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-11 00:39:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:36,459 INFO L225 Difference]: With dead ends: 2193 [2022-02-11 00:39:36,459 INFO L226 Difference]: Without dead ends: 2174 [2022-02-11 00:39:36,460 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1253, Invalid=6579, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 00:39:36,461 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 415 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 710 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:36,461 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 206 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2020 Invalid, 0 Unknown, 710 Unchecked, 1.0s Time] [2022-02-11 00:39:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-02-11 00:39:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1032. [2022-02-11 00:39:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.4219204655674105) internal successors, (2497), 1031 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2497 transitions. [2022-02-11 00:39:36,476 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2497 transitions. Word has length 29 [2022-02-11 00:39:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:36,476 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 2497 transitions. [2022-02-11 00:39:36,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2497 transitions. [2022-02-11 00:39:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:36,477 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:36,477 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:36,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:36,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:36,693 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash 314880057, now seen corresponding path program 40 times [2022-02-11 00:39:36,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:36,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321409925] [2022-02-11 00:39:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:36,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:36,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:36,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321409925] [2022-02-11 00:39:36,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321409925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:36,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919765591] [2022-02-11 00:39:36,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:39:36,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:36,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:36,962 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:36,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 00:39:36,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:39:36,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:37,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:39:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:37,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:37,474 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:37,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:37,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:37,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:37,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:37,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919765591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:37,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:37,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:39:37,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644179022] [2022-02-11 00:39:37,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:37,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:39:37,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:39:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:39:37,557 INFO L87 Difference]: Start difference. First operand 1032 states and 2497 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:39,448 INFO L93 Difference]: Finished difference Result 2723 states and 6788 transitions. [2022-02-11 00:39:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:39:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:39,452 INFO L225 Difference]: With dead ends: 2723 [2022-02-11 00:39:39,453 INFO L226 Difference]: Without dead ends: 2709 [2022-02-11 00:39:39,453 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=705, Invalid=3327, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:39:39,455 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 341 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:39,455 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 198 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:39:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2022-02-11 00:39:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 1040. [2022-02-11 00:39:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.422521655437921) internal successors, (2517), 1039 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2517 transitions. [2022-02-11 00:39:39,509 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2517 transitions. Word has length 29 [2022-02-11 00:39:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:39,509 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 2517 transitions. [2022-02-11 00:39:39,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:39,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2517 transitions. [2022-02-11 00:39:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:39,510 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:39,510 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:39,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:39,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:39,723 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1843834125, now seen corresponding path program 41 times [2022-02-11 00:39:39,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:39,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312160524] [2022-02-11 00:39:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:39,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:40,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:40,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312160524] [2022-02-11 00:39:40,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312160524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:40,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739829802] [2022-02-11 00:39:40,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:39:40,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:40,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:40,084 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:40,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:39:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:40,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:40,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 00:39:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:40,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-11 00:39:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:40,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:40,752 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:40,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:40,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:40,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:40,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:40,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:40,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739829802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:40,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:40,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-11 00:39:40,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784409435] [2022-02-11 00:39:40,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:40,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:40,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:40,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:40,856 INFO L87 Difference]: Start difference. First operand 1040 states and 2517 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:42,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:42,425 INFO L93 Difference]: Finished difference Result 2387 states and 5874 transitions. [2022-02-11 00:39:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:39:42,426 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:42,429 INFO L225 Difference]: With dead ends: 2387 [2022-02-11 00:39:42,429 INFO L226 Difference]: Without dead ends: 2377 [2022-02-11 00:39:42,429 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=361, Invalid=2089, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:39:42,429 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 338 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:42,429 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 211 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:39:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-02-11 00:39:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1034. [2022-02-11 00:39:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.4230396902226525) internal successors, (2503), 1033 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2503 transitions. [2022-02-11 00:39:42,444 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2503 transitions. Word has length 29 [2022-02-11 00:39:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:42,445 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 2503 transitions. [2022-02-11 00:39:42,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2503 transitions. [2022-02-11 00:39:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:42,446 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:42,446 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:42,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:42,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-11 00:39:42,659 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:42,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash 669763807, now seen corresponding path program 42 times [2022-02-11 00:39:42,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:42,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083702928] [2022-02-11 00:39:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:42,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:42,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083702928] [2022-02-11 00:39:42,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083702928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:42,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123753557] [2022-02-11 00:39:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:42,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:42,979 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:42,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 00:39:42,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:39:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:43,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 00:39:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:43,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:43,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:43,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-02-11 00:39:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:43,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:44,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:44,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:44,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:39:44,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-11 00:39:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:44,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123753557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:44,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:44,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-02-11 00:39:44,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894426820] [2022-02-11 00:39:44,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:44,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:39:44,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:44,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:39:44,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:39:44,492 INFO L87 Difference]: Start difference. First operand 1034 states and 2503 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:45,402 INFO L93 Difference]: Finished difference Result 1658 states and 4021 transitions. [2022-02-11 00:39:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:39:45,403 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:45,405 INFO L225 Difference]: With dead ends: 1658 [2022-02-11 00:39:45,405 INFO L226 Difference]: Without dead ends: 1635 [2022-02-11 00:39:45,405 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:39:45,406 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 929 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:45,406 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 236 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 434 Invalid, 0 Unknown, 929 Unchecked, 0.2s Time] [2022-02-11 00:39:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-02-11 00:39:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1077. [2022-02-11 00:39:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.4228624535315983) internal successors, (2607), 1076 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2607 transitions. [2022-02-11 00:39:45,418 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2607 transitions. Word has length 29 [2022-02-11 00:39:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:45,418 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 2607 transitions. [2022-02-11 00:39:45,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2607 transitions. [2022-02-11 00:39:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:45,419 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:45,419 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:45,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:45,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-11 00:39:45,635 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1563922681, now seen corresponding path program 43 times [2022-02-11 00:39:45,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:45,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324885438] [2022-02-11 00:39:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:45,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:45,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324885438] [2022-02-11 00:39:45,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324885438] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:45,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831236506] [2022-02-11 00:39:45,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:39:45,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:45,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:45,939 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:45,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 00:39:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:45,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:46,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:39:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:46,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:46,380 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:46,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:39:46,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:46,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:46,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:39:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:46,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831236506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:46,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:46,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:39:46,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544566438] [2022-02-11 00:39:46,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:46,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:46,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:46,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:46,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:46,445 INFO L87 Difference]: Start difference. First operand 1077 states and 2607 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:47,901 INFO L93 Difference]: Finished difference Result 2791 states and 6816 transitions. [2022-02-11 00:39:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:39:47,902 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:47,905 INFO L225 Difference]: With dead ends: 2791 [2022-02-11 00:39:47,905 INFO L226 Difference]: Without dead ends: 2762 [2022-02-11 00:39:47,905 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:39:47,905 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 297 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 2695 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:47,906 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 367 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:39:47,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-02-11 00:39:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1071. [2022-02-11 00:39:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 2.4271028037383178) internal successors, (2597), 1070 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2597 transitions. [2022-02-11 00:39:47,921 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2597 transitions. Word has length 29 [2022-02-11 00:39:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:47,921 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 2597 transitions. [2022-02-11 00:39:47,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2597 transitions. [2022-02-11 00:39:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:47,922 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:47,922 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:47,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:48,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-11 00:39:48,138 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash 943435545, now seen corresponding path program 44 times [2022-02-11 00:39:48,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:48,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790113170] [2022-02-11 00:39:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:48,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:48,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:48,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790113170] [2022-02-11 00:39:48,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790113170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:48,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122010494] [2022-02-11 00:39:48,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:39:48,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:48,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:48,445 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:48,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 00:39:48,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:39:48,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:48,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:48,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:48,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:39:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:48,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:49,071 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:49,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:39:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:49,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:49,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:39:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:49,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122010494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:49,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:49,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:39:49,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743014365] [2022-02-11 00:39:49,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:49,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:49,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:49,162 INFO L87 Difference]: Start difference. First operand 1071 states and 2597 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:51,058 INFO L93 Difference]: Finished difference Result 3276 states and 8130 transitions. [2022-02-11 00:39:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:39:51,059 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:51,064 INFO L225 Difference]: With dead ends: 3276 [2022-02-11 00:39:51,064 INFO L226 Difference]: Without dead ends: 3257 [2022-02-11 00:39:51,065 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:39:51,065 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 385 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:51,065 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 190 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:39:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2022-02-11 00:39:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 1084. [2022-02-11 00:39:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.430286241920591) internal successors, (2632), 1083 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2632 transitions. [2022-02-11 00:39:51,091 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2632 transitions. Word has length 29 [2022-02-11 00:39:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:51,091 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 2632 transitions. [2022-02-11 00:39:51,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2632 transitions. [2022-02-11 00:39:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:51,093 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:51,093 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:51,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:51,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:51,300 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1608638713, now seen corresponding path program 45 times [2022-02-11 00:39:51,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:51,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436931784] [2022-02-11 00:39:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:51,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:51,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436931784] [2022-02-11 00:39:51,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436931784] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:51,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523335732] [2022-02-11 00:39:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:39:51,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:51,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:51,589 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:51,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 00:39:51,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:39:51,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:51,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-11 00:39:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:51,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:52,101 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:52,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:39:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:52,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:39:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:52,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523335732] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:52,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:52,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:39:52,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714191715] [2022-02-11 00:39:52,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:52,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:52,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:52,204 INFO L87 Difference]: Start difference. First operand 1084 states and 2632 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:54,075 INFO L93 Difference]: Finished difference Result 2866 states and 7112 transitions. [2022-02-11 00:39:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:39:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:54,078 INFO L225 Difference]: With dead ends: 2866 [2022-02-11 00:39:54,078 INFO L226 Difference]: Without dead ends: 2841 [2022-02-11 00:39:54,079 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=541, Invalid=3365, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:39:54,079 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 318 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:54,079 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 197 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:39:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2022-02-11 00:39:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1063. [2022-02-11 00:39:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.426553672316384) internal successors, (2577), 1062 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 2577 transitions. [2022-02-11 00:39:54,095 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 2577 transitions. Word has length 29 [2022-02-11 00:39:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:54,095 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 2577 transitions. [2022-02-11 00:39:54,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 2577 transitions. [2022-02-11 00:39:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:54,096 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:54,096 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:54,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:54,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-11 00:39:54,312 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 357875503, now seen corresponding path program 46 times [2022-02-11 00:39:54,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:54,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499498206] [2022-02-11 00:39:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:54,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:54,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:54,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499498206] [2022-02-11 00:39:54,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499498206] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:54,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964915193] [2022-02-11 00:39:54,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:39:54,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:54,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:54,625 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:54,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 00:39:54,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:39:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:55,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:39:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:55,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:55,455 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:55,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:39:55,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:55,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:39:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:55,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964915193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:55,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:55,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:39:55,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792409576] [2022-02-11 00:39:55,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:55,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:39:55,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:39:55,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:39:55,546 INFO L87 Difference]: Start difference. First operand 1063 states and 2577 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:56,614 INFO L93 Difference]: Finished difference Result 2486 states and 6106 transitions. [2022-02-11 00:39:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:39:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:56,617 INFO L225 Difference]: With dead ends: 2486 [2022-02-11 00:39:56,617 INFO L226 Difference]: Without dead ends: 2475 [2022-02-11 00:39:56,618 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=2165, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:39:56,618 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 264 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:56,618 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 252 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:39:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-11 00:39:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1065. [2022-02-11 00:39:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.424812030075188) internal successors, (2580), 1064 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2580 transitions. [2022-02-11 00:39:56,633 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2580 transitions. Word has length 29 [2022-02-11 00:39:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:56,633 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 2580 transitions. [2022-02-11 00:39:56,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2580 transitions. [2022-02-11 00:39:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:56,634 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:56,634 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:56,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:56,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-11 00:39:56,847 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1755234587, now seen corresponding path program 47 times [2022-02-11 00:39:56,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:56,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30347543] [2022-02-11 00:39:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:57,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:57,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30347543] [2022-02-11 00:39:57,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30347543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:57,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426171513] [2022-02-11 00:39:57,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:39:57,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:57,153 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:57,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 00:39:57,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:39:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:39:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:39:57,529 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-11 00:39:57,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 82 [2022-02-11 00:39:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:57,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:39:57,816 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:39:57,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:39:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:39:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:39:57,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:39:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:57,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426171513] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:39:57,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:39:57,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:39:57,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542194455] [2022-02-11 00:39:57,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:39:57,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:39:57,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:39:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:39:57,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:39:57,938 INFO L87 Difference]: Start difference. First operand 1065 states and 2580 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:39:59,200 INFO L93 Difference]: Finished difference Result 2585 states and 6371 transitions. [2022-02-11 00:39:59,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:39:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:39:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:39:59,204 INFO L225 Difference]: With dead ends: 2585 [2022-02-11 00:39:59,204 INFO L226 Difference]: Without dead ends: 2576 [2022-02-11 00:39:59,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:39:59,204 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 360 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:39:59,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 246 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:39:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2022-02-11 00:39:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1101. [2022-02-11 00:39:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.421818181818182) internal successors, (2664), 1100 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2664 transitions. [2022-02-11 00:39:59,220 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2664 transitions. Word has length 29 [2022-02-11 00:39:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:39:59,220 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 2664 transitions. [2022-02-11 00:39:59,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:39:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2664 transitions. [2022-02-11 00:39:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:39:59,222 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:39:59,222 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:39:59,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 00:39:59,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:59,437 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:39:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:39:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2044962201, now seen corresponding path program 48 times [2022-02-11 00:39:59,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:39:59,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672595027] [2022-02-11 00:39:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:39:59,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:39:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:39:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:39:59,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:39:59,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672595027] [2022-02-11 00:39:59,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672595027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:39:59,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033743479] [2022-02-11 00:39:59,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:39:59,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:39:59,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:39:59,719 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:39:59,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 00:39:59,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:39:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:39:59,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:39:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:00,302 INFO L353 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2022-02-11 00:40:00,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 90 [2022-02-11 00:40:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:00,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:01,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:01,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:40:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:01,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033743479] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:01,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:01,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-02-11 00:40:01,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107930760] [2022-02-11 00:40:01,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:01,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:40:01,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:40:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:40:01,326 INFO L87 Difference]: Start difference. First operand 1101 states and 2664 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:03,414 INFO L93 Difference]: Finished difference Result 2404 states and 5923 transitions. [2022-02-11 00:40:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:40:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:03,418 INFO L225 Difference]: With dead ends: 2404 [2022-02-11 00:40:03,418 INFO L226 Difference]: Without dead ends: 2393 [2022-02-11 00:40:03,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=647, Invalid=3258, Unknown=1, NotChecked=0, Total=3906 [2022-02-11 00:40:03,419 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 286 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1318 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:03,419 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 280 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 950 Invalid, 0 Unknown, 1318 Unchecked, 0.5s Time] [2022-02-11 00:40:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2022-02-11 00:40:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 1105. [2022-02-11 00:40:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 2.421195652173913) internal successors, (2673), 1104 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2673 transitions. [2022-02-11 00:40:03,436 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2673 transitions. Word has length 29 [2022-02-11 00:40:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:03,436 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 2673 transitions. [2022-02-11 00:40:03,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2673 transitions. [2022-02-11 00:40:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:03,437 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:03,437 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:03,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:03,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-11 00:40:03,653 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash -151457595, now seen corresponding path program 49 times [2022-02-11 00:40:03,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:03,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653495382] [2022-02-11 00:40:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:03,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:03,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653495382] [2022-02-11 00:40:03,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653495382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:03,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670051443] [2022-02-11 00:40:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:40:03,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:03,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:03,947 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:03,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 00:40:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:03,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:04,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:40:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:04,549 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:04,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:04,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:04,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:04,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:04,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670051443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:04,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:04,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:40:04,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756220301] [2022-02-11 00:40:04,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:40:04,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:40:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:40:04,705 INFO L87 Difference]: Start difference. First operand 1105 states and 2673 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:05,740 INFO L93 Difference]: Finished difference Result 3071 states and 7589 transitions. [2022-02-11 00:40:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:40:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:05,744 INFO L225 Difference]: With dead ends: 3071 [2022-02-11 00:40:05,744 INFO L226 Difference]: Without dead ends: 3058 [2022-02-11 00:40:05,745 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:40:05,745 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 282 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:05,745 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 197 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 00:40:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-02-11 00:40:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 1136. [2022-02-11 00:40:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.428193832599119) internal successors, (2756), 1135 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 2756 transitions. [2022-02-11 00:40:05,767 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 2756 transitions. Word has length 29 [2022-02-11 00:40:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:05,767 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 2756 transitions. [2022-02-11 00:40:05,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 2756 transitions. [2022-02-11 00:40:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:05,768 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:05,768 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:05,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:05,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:05,983 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 513745573, now seen corresponding path program 50 times [2022-02-11 00:40:05,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:05,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313713431] [2022-02-11 00:40:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:05,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:06,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:06,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313713431] [2022-02-11 00:40:06,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313713431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:06,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312878371] [2022-02-11 00:40:06,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:40:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:06,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:06,308 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:06,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 00:40:06,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:40:06,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:06,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:06,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:40:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:06,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:06,844 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:06,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:40:06,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:06,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:06,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:40:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:06,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312878371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:06,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:06,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:40:06,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697829321] [2022-02-11 00:40:06,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:06,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:40:06,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:40:06,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:40:06,915 INFO L87 Difference]: Start difference. First operand 1136 states and 2756 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:07,987 INFO L93 Difference]: Finished difference Result 2506 states and 6180 transitions. [2022-02-11 00:40:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-11 00:40:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:07,991 INFO L225 Difference]: With dead ends: 2506 [2022-02-11 00:40:07,992 INFO L226 Difference]: Without dead ends: 2489 [2022-02-11 00:40:07,992 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:40:07,992 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 287 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:07,992 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 158 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:40:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2022-02-11 00:40:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1120. [2022-02-11 00:40:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.4244861483467384) internal successors, (2713), 1119 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2713 transitions. [2022-02-11 00:40:08,011 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2713 transitions. Word has length 29 [2022-02-11 00:40:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:08,011 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 2713 transitions. [2022-02-11 00:40:08,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2713 transitions. [2022-02-11 00:40:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:08,013 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:08,013 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:08,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-11 00:40:08,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-11 00:40:08,229 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:08,229 INFO L85 PathProgramCache]: Analyzing trace with hash 977071387, now seen corresponding path program 51 times [2022-02-11 00:40:08,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:08,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228675871] [2022-02-11 00:40:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:08,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:08,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:08,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228675871] [2022-02-11 00:40:08,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228675871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:08,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412375861] [2022-02-11 00:40:08,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:40:08,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:08,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:08,526 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:08,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 00:40:08,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:40:08,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:08,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:40:08,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:08,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:08,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:40:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:08,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:09,110 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:09,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:09,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:09,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:09,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:09,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:09,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412375861] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:09,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:09,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 30 [2022-02-11 00:40:09,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946233804] [2022-02-11 00:40:09,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:09,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:40:09,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:40:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:40:09,212 INFO L87 Difference]: Start difference. First operand 1120 states and 2713 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:10,336 INFO L93 Difference]: Finished difference Result 2569 states and 6334 transitions. [2022-02-11 00:40:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-11 00:40:10,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:10,340 INFO L225 Difference]: With dead ends: 2569 [2022-02-11 00:40:10,340 INFO L226 Difference]: Without dead ends: 2560 [2022-02-11 00:40:10,340 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 00:40:10,341 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 285 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:10,341 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 285 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:40:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-02-11 00:40:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1119. [2022-02-11 00:40:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.424865831842576) internal successors, (2711), 1118 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2711 transitions. [2022-02-11 00:40:10,392 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2711 transitions. Word has length 29 [2022-02-11 00:40:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:10,392 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 2711 transitions. [2022-02-11 00:40:10,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2711 transitions. [2022-02-11 00:40:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:10,393 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:10,393 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:10,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:10,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-11 00:40:10,623 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash -270744883, now seen corresponding path program 52 times [2022-02-11 00:40:10,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:10,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017166550] [2022-02-11 00:40:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:10,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:10,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:10,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017166550] [2022-02-11 00:40:10,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017166550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:10,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189954876] [2022-02-11 00:40:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:40:10,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:10,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:10,912 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:10,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 00:40:10,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:40:10,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:10,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:11,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-02-11 00:40:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:11,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:11,461 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:11,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:11,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:11,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:11,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:11,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:11,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189954876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:11,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:11,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:40:11,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188983290] [2022-02-11 00:40:11,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:11,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:40:11,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:11,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:40:11,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:40:11,561 INFO L87 Difference]: Start difference. First operand 1119 states and 2711 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:13,217 INFO L93 Difference]: Finished difference Result 2743 states and 6732 transitions. [2022-02-11 00:40:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 00:40:13,217 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:13,220 INFO L225 Difference]: With dead ends: 2743 [2022-02-11 00:40:13,220 INFO L226 Difference]: Without dead ends: 2725 [2022-02-11 00:40:13,221 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:40:13,221 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 325 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:13,221 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 304 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:40:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2022-02-11 00:40:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1101. [2022-02-11 00:40:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 2.421818181818182) internal successors, (2664), 1100 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 2664 transitions. [2022-02-11 00:40:13,239 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 2664 transitions. Word has length 29 [2022-02-11 00:40:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:13,239 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 2664 transitions. [2022-02-11 00:40:13,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 2664 transitions. [2022-02-11 00:40:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:13,241 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:13,241 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:13,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:13,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:13,455 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash -375581373, now seen corresponding path program 53 times [2022-02-11 00:40:13,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:13,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701496170] [2022-02-11 00:40:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:13,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:13,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:13,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701496170] [2022-02-11 00:40:13,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701496170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:13,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620563724] [2022-02-11 00:40:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:40:13,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:13,765 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:13,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 00:40:13,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:40:13,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:13,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:13,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:14,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:40:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:14,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:14,303 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:14,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:14,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:14,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:14,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:14,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620563724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:14,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:14,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:40:14,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598322259] [2022-02-11 00:40:14,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:14,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:40:14,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:14,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:40:14,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:40:14,404 INFO L87 Difference]: Start difference. First operand 1101 states and 2664 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:16,123 INFO L93 Difference]: Finished difference Result 2712 states and 6682 transitions. [2022-02-11 00:40:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:40:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:16,127 INFO L225 Difference]: With dead ends: 2712 [2022-02-11 00:40:16,128 INFO L226 Difference]: Without dead ends: 2683 [2022-02-11 00:40:16,128 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=449, Invalid=2973, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:40:16,128 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 365 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:16,129 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 257 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:40:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-02-11 00:40:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1148. [2022-02-11 00:40:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 2.4324324324324325) internal successors, (2790), 1147 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 2790 transitions. [2022-02-11 00:40:16,149 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 2790 transitions. Word has length 29 [2022-02-11 00:40:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:16,149 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 2790 transitions. [2022-02-11 00:40:16,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 2790 transitions. [2022-02-11 00:40:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:16,150 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:16,150 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:16,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:16,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:16,363 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -101909635, now seen corresponding path program 54 times [2022-02-11 00:40:16,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:16,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817894143] [2022-02-11 00:40:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:16,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:16,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:16,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817894143] [2022-02-11 00:40:16,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817894143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:16,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906463182] [2022-02-11 00:40:16,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:40:16,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:16,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:16,678 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:16,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 00:40:16,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:40:16,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:16,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:16,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:40:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:16,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:17,156 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:17,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:17,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:17,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:17,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:17,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:17,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906463182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:17,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:17,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:40:17,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620581479] [2022-02-11 00:40:17,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:17,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:40:17,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:40:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:40:17,224 INFO L87 Difference]: Start difference. First operand 1148 states and 2790 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:19,658 INFO L93 Difference]: Finished difference Result 3319 states and 8242 transitions. [2022-02-11 00:40:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:40:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:19,662 INFO L225 Difference]: With dead ends: 3319 [2022-02-11 00:40:19,663 INFO L226 Difference]: Without dead ends: 3294 [2022-02-11 00:40:19,663 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=885, Invalid=4665, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:40:19,663 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 455 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:19,663 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 171 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:40:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2022-02-11 00:40:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 1157. [2022-02-11 00:40:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.4333910034602075) internal successors, (2813), 1156 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2813 transitions. [2022-02-11 00:40:19,683 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2813 transitions. Word has length 29 [2022-02-11 00:40:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:19,683 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 2813 transitions. [2022-02-11 00:40:19,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2813 transitions. [2022-02-11 00:40:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:19,685 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:19,685 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:19,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-11 00:40:19,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:19,899 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash 563293533, now seen corresponding path program 55 times [2022-02-11 00:40:19,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:19,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852845818] [2022-02-11 00:40:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:20,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:20,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852845818] [2022-02-11 00:40:20,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852845818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:20,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375176060] [2022-02-11 00:40:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:40:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:20,203 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:20,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 00:40:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:20,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:40:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:20,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:20,727 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:20,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:40:20,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:20,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:20,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:20,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:40:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:20,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375176060] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:20,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:20,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:40:20,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440131264] [2022-02-11 00:40:20,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:20,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:40:20,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:40:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:40:20,838 INFO L87 Difference]: Start difference. First operand 1157 states and 2813 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:22,610 INFO L93 Difference]: Finished difference Result 2614 states and 6467 transitions. [2022-02-11 00:40:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:40:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:22,614 INFO L225 Difference]: With dead ends: 2614 [2022-02-11 00:40:22,614 INFO L226 Difference]: Without dead ends: 2587 [2022-02-11 00:40:22,615 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=2721, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:40:22,615 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 367 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:22,615 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 169 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1867 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:40:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-02-11 00:40:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1137. [2022-02-11 00:40:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.4286971830985915) internal successors, (2759), 1136 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2759 transitions. [2022-02-11 00:40:22,632 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2759 transitions. Word has length 29 [2022-02-11 00:40:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:22,632 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 2759 transitions. [2022-02-11 00:40:22,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2759 transitions. [2022-02-11 00:40:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:22,634 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:22,634 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:22,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-11 00:40:22,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-11 00:40:22,836 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1463713709, now seen corresponding path program 56 times [2022-02-11 00:40:22,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:22,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906209190] [2022-02-11 00:40:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:22,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:23,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:23,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906209190] [2022-02-11 00:40:23,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906209190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:23,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033279988] [2022-02-11 00:40:23,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:40:23,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:23,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:23,110 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:23,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 00:40:23,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:40:23,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:23,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:40:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:23,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:23,737 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:23,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:23,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:23,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:23,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:23,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:23,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033279988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:23,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:23,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:40:23,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621034290] [2022-02-11 00:40:23,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:23,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:40:23,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:40:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:40:23,844 INFO L87 Difference]: Start difference. First operand 1137 states and 2759 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:26,013 INFO L93 Difference]: Finished difference Result 3629 states and 9144 transitions. [2022-02-11 00:40:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:40:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:26,019 INFO L225 Difference]: With dead ends: 3629 [2022-02-11 00:40:26,019 INFO L226 Difference]: Without dead ends: 3610 [2022-02-11 00:40:26,019 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=668, Invalid=4024, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:40:26,020 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 355 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:26,020 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 200 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:40:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2022-02-11 00:40:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 1155. [2022-02-11 00:40:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.431542461005199) internal successors, (2806), 1154 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2806 transitions. [2022-02-11 00:40:26,041 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2806 transitions. Word has length 29 [2022-02-11 00:40:26,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:26,041 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 2806 transitions. [2022-02-11 00:40:26,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:26,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2806 transitions. [2022-02-11 00:40:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:26,043 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:26,043 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:26,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-11 00:40:26,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-11 00:40:26,258 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:26,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:26,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1074852537, now seen corresponding path program 57 times [2022-02-11 00:40:26,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:26,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824329090] [2022-02-11 00:40:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:26,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:26,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824329090] [2022-02-11 00:40:26,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824329090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:26,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511390772] [2022-02-11 00:40:26,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:40:26,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:26,529 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:26,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 00:40:26,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:40:26,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:26,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:26,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:40:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:26,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:27,001 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:27,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:40:27,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:27,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:27,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:27,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:40:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:27,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511390772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:27,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:27,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:40:27,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535849581] [2022-02-11 00:40:27,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:27,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:40:27,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:40:27,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:40:27,090 INFO L87 Difference]: Start difference. First operand 1155 states and 2806 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:28,866 INFO L93 Difference]: Finished difference Result 2954 states and 7370 transitions. [2022-02-11 00:40:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:40:28,866 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:28,870 INFO L225 Difference]: With dead ends: 2954 [2022-02-11 00:40:28,870 INFO L226 Difference]: Without dead ends: 2926 [2022-02-11 00:40:28,871 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=666, Invalid=4304, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:40:28,871 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 424 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:28,871 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 171 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:40:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-02-11 00:40:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1146. [2022-02-11 00:40:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.4305676855895197) internal successors, (2783), 1145 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2783 transitions. [2022-02-11 00:40:28,892 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2783 transitions. Word has length 29 [2022-02-11 00:40:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:28,892 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 2783 transitions. [2022-02-11 00:40:28,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2783 transitions. [2022-02-11 00:40:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:28,893 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:28,893 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:28,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:29,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:29,100 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 454101531, now seen corresponding path program 58 times [2022-02-11 00:40:29,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:29,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80109536] [2022-02-11 00:40:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:29,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:29,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80109536] [2022-02-11 00:40:29,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80109536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:29,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548192176] [2022-02-11 00:40:29,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:40:29,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:29,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:29,403 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:29,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 00:40:29,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:40:29,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:29,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-02-11 00:40:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:29,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:29,984 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:29,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:40:30,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:30,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:30,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:30,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:40:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:30,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548192176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:30,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:30,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-11 00:40:30,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015496763] [2022-02-11 00:40:30,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:30,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:40:30,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:30,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:40:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:40:30,096 INFO L87 Difference]: Start difference. First operand 1146 states and 2783 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:31,795 INFO L93 Difference]: Finished difference Result 2632 states and 6501 transitions. [2022-02-11 00:40:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:40:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:31,799 INFO L225 Difference]: With dead ends: 2632 [2022-02-11 00:40:31,799 INFO L226 Difference]: Without dead ends: 2619 [2022-02-11 00:40:31,800 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=2844, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:40:31,800 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 345 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:31,800 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 203 Invalid, 2441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:40:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2022-02-11 00:40:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1143. [2022-02-11 00:40:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.4308231173380035) internal successors, (2776), 1142 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2776 transitions. [2022-02-11 00:40:31,820 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2776 transitions. Word has length 29 [2022-02-11 00:40:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:31,820 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 2776 transitions. [2022-02-11 00:40:31,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2776 transitions. [2022-02-11 00:40:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:31,821 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:31,822 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:31,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:32,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:32,038 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash -213576143, now seen corresponding path program 59 times [2022-02-11 00:40:32,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:32,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899021622] [2022-02-11 00:40:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:32,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:32,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:32,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899021622] [2022-02-11 00:40:32,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899021622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:32,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281848982] [2022-02-11 00:40:32,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:40:32,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:32,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:32,353 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:32,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 00:40:32,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:40:32,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:32,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:40:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:32,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:33,037 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:33,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:33,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:33,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:33,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281848982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:33,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:33,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:40:33,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143339898] [2022-02-11 00:40:33,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:33,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:40:33,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:40:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:40:33,146 INFO L87 Difference]: Start difference. First operand 1143 states and 2776 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:35,097 INFO L93 Difference]: Finished difference Result 3206 states and 7859 transitions. [2022-02-11 00:40:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:40:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:35,102 INFO L225 Difference]: With dead ends: 3206 [2022-02-11 00:40:35,102 INFO L226 Difference]: Without dead ends: 3169 [2022-02-11 00:40:35,102 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=521, Invalid=3639, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:40:35,103 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 409 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:35,103 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 294 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:40:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2022-02-11 00:40:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 1168. [2022-02-11 00:40:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.4318766066838045) internal successors, (2838), 1167 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2838 transitions. [2022-02-11 00:40:35,122 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2838 transitions. Word has length 29 [2022-02-11 00:40:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:35,122 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 2838 transitions. [2022-02-11 00:40:35,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2838 transitions. [2022-02-11 00:40:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:35,123 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:35,123 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:35,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:35,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:35,340 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash 60095595, now seen corresponding path program 60 times [2022-02-11 00:40:35,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:35,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000711877] [2022-02-11 00:40:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:35,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:35,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000711877] [2022-02-11 00:40:35,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000711877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:35,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751080083] [2022-02-11 00:40:35,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:40:35,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:35,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:35,654 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:35,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 00:40:35,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:40:35,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:35,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:35,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:40:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:36,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:36,244 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:36,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:36,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:36,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:36,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:36,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751080083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:36,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:36,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:40:36,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521255070] [2022-02-11 00:40:36,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:36,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:40:36,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:40:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:40:36,351 INFO L87 Difference]: Start difference. First operand 1168 states and 2838 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:38,939 INFO L93 Difference]: Finished difference Result 3662 states and 9117 transitions. [2022-02-11 00:40:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 00:40:38,940 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:38,946 INFO L225 Difference]: With dead ends: 3662 [2022-02-11 00:40:38,946 INFO L226 Difference]: Without dead ends: 3643 [2022-02-11 00:40:38,947 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=821, Invalid=4879, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:40:38,947 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 431 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:38,947 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 221 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:40:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2022-02-11 00:40:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 1181. [2022-02-11 00:40:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.4347457627118643) internal successors, (2873), 1180 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2873 transitions. [2022-02-11 00:40:38,974 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2873 transitions. Word has length 29 [2022-02-11 00:40:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:38,974 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 2873 transitions. [2022-02-11 00:40:38,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2873 transitions. [2022-02-11 00:40:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:38,976 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:38,976 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:38,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:39,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:39,192 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 725298763, now seen corresponding path program 61 times [2022-02-11 00:40:39,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:39,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095388523] [2022-02-11 00:40:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:39,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:39,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:39,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095388523] [2022-02-11 00:40:39,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095388523] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:39,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607203583] [2022-02-11 00:40:39,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:40:39,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:39,491 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 00:40:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:39,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-11 00:40:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:39,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:39,999 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:39,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:40:40,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:40,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:40,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:40:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:40,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607203583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:40,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:40,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:40:40,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861234818] [2022-02-11 00:40:40,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:40,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:40:40,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:40:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:40:40,101 INFO L87 Difference]: Start difference. First operand 1181 states and 2873 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:41,754 INFO L93 Difference]: Finished difference Result 2892 states and 7171 transitions. [2022-02-11 00:40:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:40:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:41,759 INFO L225 Difference]: With dead ends: 2892 [2022-02-11 00:40:41,759 INFO L226 Difference]: Without dead ends: 2863 [2022-02-11 00:40:41,760 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=450, Invalid=2856, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:40:41,760 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 328 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:41,760 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 210 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:40:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-02-11 00:40:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 1184. [2022-02-11 00:40:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.4344885883347422) internal successors, (2880), 1183 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2880 transitions. [2022-02-11 00:40:41,781 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2880 transitions. Word has length 29 [2022-02-11 00:40:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 2880 transitions. [2022-02-11 00:40:41,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2880 transitions. [2022-02-11 00:40:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:41,783 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:41,783 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:41,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:41,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 00:40:41,996 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -525464447, now seen corresponding path program 62 times [2022-02-11 00:40:41,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:41,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618480223] [2022-02-11 00:40:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:42,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:42,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618480223] [2022-02-11 00:40:42,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618480223] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:42,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263095111] [2022-02-11 00:40:42,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:40:42,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:42,277 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:42,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 00:40:42,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:40:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:42,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:42,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:42,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:40:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:42,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:42,915 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:42,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:42,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:42,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:42,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:42,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:43,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263095111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:43,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:43,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:40:43,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310801012] [2022-02-11 00:40:43,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:43,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:40:43,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:40:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:40:43,033 INFO L87 Difference]: Start difference. First operand 1184 states and 2880 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:44,673 INFO L93 Difference]: Finished difference Result 2784 states and 6870 transitions. [2022-02-11 00:40:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:40:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:44,680 INFO L225 Difference]: With dead ends: 2784 [2022-02-11 00:40:44,680 INFO L226 Difference]: Without dead ends: 2773 [2022-02-11 00:40:44,680 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=2327, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:40:44,680 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 312 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:44,680 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 334 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:40:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2022-02-11 00:40:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1181. [2022-02-11 00:40:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.4347457627118643) internal successors, (2873), 1180 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2873 transitions. [2022-02-11 00:40:44,698 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2873 transitions. Word has length 29 [2022-02-11 00:40:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:44,698 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 2873 transitions. [2022-02-11 00:40:44,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2873 transitions. [2022-02-11 00:40:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:44,699 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:44,699 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:44,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-11 00:40:44,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:44,914 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:44,915 INFO L85 PathProgramCache]: Analyzing trace with hash 242889651, now seen corresponding path program 63 times [2022-02-11 00:40:44,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:44,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195334357] [2022-02-11 00:40:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:44,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:45,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:45,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195334357] [2022-02-11 00:40:45,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195334357] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:45,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382033245] [2022-02-11 00:40:45,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:40:45,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:45,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:45,174 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:45,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 00:40:45,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:40:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:45,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:40:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:45,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:45,809 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:45,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:45,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:45,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:45,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382033245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:45,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:45,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-11 00:40:45,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350023193] [2022-02-11 00:40:45,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:45,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:40:45,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:45,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:40:45,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:40:45,930 INFO L87 Difference]: Start difference. First operand 1181 states and 2873 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:47,341 INFO L93 Difference]: Finished difference Result 2937 states and 7332 transitions. [2022-02-11 00:40:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-11 00:40:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:47,345 INFO L225 Difference]: With dead ends: 2937 [2022-02-11 00:40:47,345 INFO L226 Difference]: Without dead ends: 2926 [2022-02-11 00:40:47,345 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:40:47,346 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 227 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:47,346 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 234 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:40:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-02-11 00:40:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1218. [2022-02-11 00:40:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.441248972884141) internal successors, (2971), 1217 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2971 transitions. [2022-02-11 00:40:47,364 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2971 transitions. Word has length 29 [2022-02-11 00:40:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:47,364 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 2971 transitions. [2022-02-11 00:40:47,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2971 transitions. [2022-02-11 00:40:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:47,366 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:47,366 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:47,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-11 00:40:47,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-11 00:40:47,579 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash 516561389, now seen corresponding path program 64 times [2022-02-11 00:40:47,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:47,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706393351] [2022-02-11 00:40:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:47,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:47,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:47,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706393351] [2022-02-11 00:40:47,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706393351] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:47,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320241198] [2022-02-11 00:40:47,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:40:47,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:47,818 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:47,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 00:40:47,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:40:47,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:48,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:40:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:48,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:48,210 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:48,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:48,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:48,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:48,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:48,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:48,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320241198] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:48,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:48,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:40:48,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803225169] [2022-02-11 00:40:48,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:48,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:40:48,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:40:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:40:48,320 INFO L87 Difference]: Start difference. First operand 1218 states and 2971 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:49,392 INFO L93 Difference]: Finished difference Result 2821 states and 7062 transitions. [2022-02-11 00:40:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:40:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:49,396 INFO L225 Difference]: With dead ends: 2821 [2022-02-11 00:40:49,396 INFO L226 Difference]: Without dead ends: 2810 [2022-02-11 00:40:49,397 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:40:49,397 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:49,397 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 150 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:40:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2022-02-11 00:40:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1222. [2022-02-11 00:40:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 2.444717444717445) internal successors, (2985), 1221 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 2985 transitions. [2022-02-11 00:40:49,417 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 2985 transitions. Word has length 29 [2022-02-11 00:40:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:49,417 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 2985 transitions. [2022-02-11 00:40:49,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 2985 transitions. [2022-02-11 00:40:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:49,419 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:49,419 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:49,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-11 00:40:49,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-11 00:40:49,635 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1181764557, now seen corresponding path program 65 times [2022-02-11 00:40:49,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:49,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691265568] [2022-02-11 00:40:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:49,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:49,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691265568] [2022-02-11 00:40:49,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691265568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:49,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760760068] [2022-02-11 00:40:49,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:40:49,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:49,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:49,861 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:49,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 00:40:49,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:40:49,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:49,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:40:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:50,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:50,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:50,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:50,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:50,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:40:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:50,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:50,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:50,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:50,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:40:50,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 43 [2022-02-11 00:40:50,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:50,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:50,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:40:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:50,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760760068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:50,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:50,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-02-11 00:40:50,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903829361] [2022-02-11 00:40:50,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:50,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:40:50,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:40:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:40:50,796 INFO L87 Difference]: Start difference. First operand 1222 states and 2985 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:53,257 INFO L93 Difference]: Finished difference Result 2750 states and 6860 transitions. [2022-02-11 00:40:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 00:40:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:53,261 INFO L225 Difference]: With dead ends: 2750 [2022-02-11 00:40:53,261 INFO L226 Difference]: Without dead ends: 2735 [2022-02-11 00:40:53,262 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=828, Invalid=5178, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:40:53,262 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 385 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:53,262 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 159 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:40:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2022-02-11 00:40:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 1265. [2022-02-11 00:40:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 2.4533227848101267) internal successors, (3101), 1264 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 3101 transitions. [2022-02-11 00:40:53,281 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 3101 transitions. Word has length 29 [2022-02-11 00:40:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:53,281 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 3101 transitions. [2022-02-11 00:40:53,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 3101 transitions. [2022-02-11 00:40:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:53,282 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:53,282 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:53,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:53,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-11 00:40:53,495 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:53,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1770754815, now seen corresponding path program 66 times [2022-02-11 00:40:53,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:53,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736985275] [2022-02-11 00:40:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:53,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:53,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:53,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736985275] [2022-02-11 00:40:53,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736985275] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:53,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661254452] [2022-02-11 00:40:53,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:40:53,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:53,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:53,762 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:53,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 00:40:53,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:40:53,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:53,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:54,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-02-11 00:40:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:54,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:54,405 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:54,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:40:54,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:54,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:54,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:40:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:54,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661254452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:54,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:54,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-02-11 00:40:54,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939028431] [2022-02-11 00:40:54,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:54,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:40:54,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:40:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:40:54,521 INFO L87 Difference]: Start difference. First operand 1265 states and 3101 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:56,366 INFO L93 Difference]: Finished difference Result 3632 states and 9137 transitions. [2022-02-11 00:40:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:40:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:56,371 INFO L225 Difference]: With dead ends: 3632 [2022-02-11 00:40:56,371 INFO L226 Difference]: Without dead ends: 3597 [2022-02-11 00:40:56,372 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:40:56,372 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 311 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:56,372 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 185 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:40:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2022-02-11 00:40:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1240. [2022-02-11 00:40:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.4414850686037126) internal successors, (3025), 1239 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3025 transitions. [2022-02-11 00:40:56,395 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3025 transitions. Word has length 29 [2022-02-11 00:40:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:56,395 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3025 transitions. [2022-02-11 00:40:56,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3025 transitions. [2022-02-11 00:40:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:56,397 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:56,397 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:56,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-11 00:40:56,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-11 00:40:56,613 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:56,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1875666015, now seen corresponding path program 67 times [2022-02-11 00:40:56,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:56,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023384893] [2022-02-11 00:40:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:56,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:56,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:56,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023384893] [2022-02-11 00:40:56,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023384893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:56,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642646487] [2022-02-11 00:40:56,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:40:56,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:56,900 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:56,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 00:40:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:40:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:40:57,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:40:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:57,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:40:57,530 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:40:57,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:40:57,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:57,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:40:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:40:57,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:40:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:57,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642646487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:40:57,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:40:57,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:40:57,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086884479] [2022-02-11 00:40:57,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:40:57,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:40:57,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:40:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:40:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:40:57,647 INFO L87 Difference]: Start difference. First operand 1240 states and 3025 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:59,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:40:59,176 INFO L93 Difference]: Finished difference Result 3126 states and 7818 transitions. [2022-02-11 00:40:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:40:59,177 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:40:59,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:40:59,181 INFO L225 Difference]: With dead ends: 3126 [2022-02-11 00:40:59,181 INFO L226 Difference]: Without dead ends: 3111 [2022-02-11 00:40:59,181 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=461, Invalid=2845, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:40:59,182 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 289 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:40:59,182 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 226 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1931 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:40:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-02-11 00:40:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1256. [2022-02-11 00:40:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 2.446215139442231) internal successors, (3070), 1255 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 3070 transitions. [2022-02-11 00:40:59,202 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 3070 transitions. Word has length 29 [2022-02-11 00:40:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:40:59,202 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 3070 transitions. [2022-02-11 00:40:59,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:40:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 3070 transitions. [2022-02-11 00:40:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:40:59,210 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:40:59,210 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:40:59,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-11 00:40:59,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:59,419 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:40:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:40:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash -662900231, now seen corresponding path program 68 times [2022-02-11 00:40:59,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:40:59,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594560811] [2022-02-11 00:40:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:40:59,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:40:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:40:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:40:59,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:40:59,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594560811] [2022-02-11 00:40:59,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594560811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:40:59,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532707801] [2022-02-11 00:40:59,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:40:59,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:40:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:40:59,722 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:40:59,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 00:40:59,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:40:59,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:40:59,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:40:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:00,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:41:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:00,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:00,358 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:00,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:41:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:00,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:00,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:00,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:00,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532707801] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:00,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:00,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:41:00,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233440376] [2022-02-11 00:41:00,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:00,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:41:00,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:00,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:41:00,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:41:00,475 INFO L87 Difference]: Start difference. First operand 1256 states and 3070 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:02,090 INFO L93 Difference]: Finished difference Result 3150 states and 7852 transitions. [2022-02-11 00:41:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 00:41:02,090 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:02,095 INFO L225 Difference]: With dead ends: 3150 [2022-02-11 00:41:02,095 INFO L226 Difference]: Without dead ends: 3116 [2022-02-11 00:41:02,096 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:41:02,096 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 338 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:02,096 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 211 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:41:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-02-11 00:41:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1249. [2022-02-11 00:41:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.4423076923076925) internal successors, (3048), 1248 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3048 transitions. [2022-02-11 00:41:02,135 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3048 transitions. Word has length 29 [2022-02-11 00:41:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:02,135 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 3048 transitions. [2022-02-11 00:41:02,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3048 transitions. [2022-02-11 00:41:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:02,140 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:02,140 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:02,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:02,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:02,356 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash 866053837, now seen corresponding path program 69 times [2022-02-11 00:41:02,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:02,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123723906] [2022-02-11 00:41:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:02,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:02,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123723906] [2022-02-11 00:41:02,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123723906] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:02,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629870845] [2022-02-11 00:41:02,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:41:02,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:02,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:02,731 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 00:41:02,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:41:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:02,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:02,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:03,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:03,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-02-11 00:41:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:03,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:04,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:04,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:41:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:04,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629870845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:04,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:04,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-02-11 00:41:04,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109419314] [2022-02-11 00:41:04,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:04,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:41:04,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:41:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:41:04,396 INFO L87 Difference]: Start difference. First operand 1249 states and 3048 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:08,158 INFO L93 Difference]: Finished difference Result 3511 states and 8720 transitions. [2022-02-11 00:41:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:41:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:08,163 INFO L225 Difference]: With dead ends: 3511 [2022-02-11 00:41:08,163 INFO L226 Difference]: Without dead ends: 3475 [2022-02-11 00:41:08,164 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1231, Invalid=7511, Unknown=0, NotChecked=0, Total=8742 [2022-02-11 00:41:08,164 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 470 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1385 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:08,164 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 256 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1760 Invalid, 0 Unknown, 1385 Unchecked, 0.9s Time] [2022-02-11 00:41:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2022-02-11 00:41:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 1262. [2022-02-11 00:41:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.443298969072165) internal successors, (3081), 1261 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3081 transitions. [2022-02-11 00:41:08,211 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3081 transitions. Word has length 29 [2022-02-11 00:41:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:08,211 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3081 transitions. [2022-02-11 00:41:08,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3081 transitions. [2022-02-11 00:41:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:08,213 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:08,213 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:08,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:08,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:08,427 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash 368061235, now seen corresponding path program 70 times [2022-02-11 00:41:08,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:08,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900001779] [2022-02-11 00:41:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:08,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:08,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900001779] [2022-02-11 00:41:08,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900001779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:08,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630347223] [2022-02-11 00:41:08,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:41:08,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:08,693 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:08,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 00:41:08,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:41:08,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:08,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:41:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:08,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:41:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:09,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:09,266 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:09,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:09,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:09,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:09,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:41:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:09,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630347223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:09,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:09,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:41:09,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473254791] [2022-02-11 00:41:09,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:09,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:41:09,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:09,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:41:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:41:09,372 INFO L87 Difference]: Start difference. First operand 1262 states and 3081 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:10,646 INFO L93 Difference]: Finished difference Result 3406 states and 8543 transitions. [2022-02-11 00:41:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:41:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:10,651 INFO L225 Difference]: With dead ends: 3406 [2022-02-11 00:41:10,652 INFO L226 Difference]: Without dead ends: 3391 [2022-02-11 00:41:10,652 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=390, Invalid=2472, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:41:10,652 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 242 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:10,652 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 275 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:41:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2022-02-11 00:41:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 1290. [2022-02-11 00:41:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 2.4499612102404966) internal successors, (3158), 1289 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 3158 transitions. [2022-02-11 00:41:10,675 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 3158 transitions. Word has length 29 [2022-02-11 00:41:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:10,675 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 3158 transitions. [2022-02-11 00:41:10,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 3158 transitions. [2022-02-11 00:41:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:10,676 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:10,676 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:10,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:10,892 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,SelfDestructingSolverStorable73 [2022-02-11 00:41:10,893 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2124462285, now seen corresponding path program 71 times [2022-02-11 00:41:10,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:10,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44485766] [2022-02-11 00:41:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:10,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:11,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:11,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44485766] [2022-02-11 00:41:11,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44485766] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:11,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819863525] [2022-02-11 00:41:11,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:41:11,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:11,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:11,154 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:11,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 00:41:11,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:41:11,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:11,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:41:11,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:11,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:11,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:41:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:11,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:11,696 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:11,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:41:11,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:11,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:11,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:11,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:11,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819863525] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:11,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:11,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-02-11 00:41:11,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409857650] [2022-02-11 00:41:11,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:11,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:41:11,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:41:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:41:11,778 INFO L87 Difference]: Start difference. First operand 1290 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:12,930 INFO L93 Difference]: Finished difference Result 3446 states and 8576 transitions. [2022-02-11 00:41:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:41:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:12,936 INFO L225 Difference]: With dead ends: 3446 [2022-02-11 00:41:12,936 INFO L226 Difference]: Without dead ends: 3413 [2022-02-11 00:41:12,936 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=2667, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:41:12,936 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 303 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:12,937 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 330 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:41:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2022-02-11 00:41:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 1273. [2022-02-11 00:41:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 2.4449685534591197) internal successors, (3110), 1272 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 3110 transitions. [2022-02-11 00:41:12,962 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 3110 transitions. Word has length 29 [2022-02-11 00:41:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:12,962 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 3110 transitions. [2022-02-11 00:41:12,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 3110 transitions. [2022-02-11 00:41:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:12,965 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:12,965 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:12,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-11 00:41:13,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:13,167 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash 553122373, now seen corresponding path program 72 times [2022-02-11 00:41:13,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:13,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934059585] [2022-02-11 00:41:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:13,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:13,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:13,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934059585] [2022-02-11 00:41:13,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934059585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:13,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429788535] [2022-02-11 00:41:13,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:41:13,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:13,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:13,363 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:13,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 00:41:13,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:41:13,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:13,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:13,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:13,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:13,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-02-11 00:41:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:14,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:14,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:14,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:41:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:14,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429788535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:14,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:14,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-02-11 00:41:14,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149455921] [2022-02-11 00:41:14,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:14,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:41:14,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:14,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:41:14,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:41:14,658 INFO L87 Difference]: Start difference. First operand 1273 states and 3110 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:15,362 INFO L93 Difference]: Finished difference Result 1781 states and 4358 transitions. [2022-02-11 00:41:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:41:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:15,364 INFO L225 Difference]: With dead ends: 1781 [2022-02-11 00:41:15,364 INFO L226 Difference]: Without dead ends: 1771 [2022-02-11 00:41:15,365 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=2456, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:41:15,365 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:15,365 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 153 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 334 Invalid, 0 Unknown, 401 Unchecked, 0.1s Time] [2022-02-11 00:41:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-02-11 00:41:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1294. [2022-02-11 00:41:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.4447022428460943) internal successors, (3161), 1293 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 3161 transitions. [2022-02-11 00:41:15,395 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 3161 transitions. Word has length 29 [2022-02-11 00:41:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:15,395 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 3161 transitions. [2022-02-11 00:41:15,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 3161 transitions. [2022-02-11 00:41:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:15,397 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:15,397 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:15,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:15,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:15,611 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash 797033099, now seen corresponding path program 73 times [2022-02-11 00:41:15,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:15,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046218963] [2022-02-11 00:41:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:15,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:15,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:15,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046218963] [2022-02-11 00:41:15,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046218963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:15,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351524918] [2022-02-11 00:41:15,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:41:15,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:15,864 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:15,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 00:41:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:41:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:16,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-11 00:41:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:16,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:16,519 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:16,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:41:16,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:16,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:16,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:16,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:16,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351524918] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:16,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:16,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:41:16,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111434922] [2022-02-11 00:41:16,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:16,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:16,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:16,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:16,629 INFO L87 Difference]: Start difference. First operand 1294 states and 3161 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:18,693 INFO L93 Difference]: Finished difference Result 3155 states and 7701 transitions. [2022-02-11 00:41:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:41:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:18,698 INFO L225 Difference]: With dead ends: 3155 [2022-02-11 00:41:18,698 INFO L226 Difference]: Without dead ends: 3100 [2022-02-11 00:41:18,698 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:41:18,698 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 376 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:18,698 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 359 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:41:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-02-11 00:41:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1254. [2022-02-11 00:41:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 2.4421388667198722) internal successors, (3060), 1253 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 3060 transitions. [2022-02-11 00:41:18,716 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 3060 transitions. Word has length 29 [2022-02-11 00:41:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:18,717 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 3060 transitions. [2022-02-11 00:41:18,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 3060 transitions. [2022-02-11 00:41:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:18,718 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:18,718 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:18,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:18,920 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,SelfDestructingSolverStorable76 [2022-02-11 00:41:18,921 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:18,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:18,921 INFO L85 PathProgramCache]: Analyzing trace with hash -760122651, now seen corresponding path program 74 times [2022-02-11 00:41:18,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:18,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262304492] [2022-02-11 00:41:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:18,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:19,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:19,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262304492] [2022-02-11 00:41:19,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262304492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:19,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422996266] [2022-02-11 00:41:19,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:41:19,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:19,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:19,168 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:19,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 00:41:19,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:41:19,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:19,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:19,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:41:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:19,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:19,856 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:19,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:41:19,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:19,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:19,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:19,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422996266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:19,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:19,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-02-11 00:41:19,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141509268] [2022-02-11 00:41:19,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:19,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:19,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:19,960 INFO L87 Difference]: Start difference. First operand 1254 states and 3060 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:21,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:21,079 INFO L93 Difference]: Finished difference Result 2678 states and 6587 transitions. [2022-02-11 00:41:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:41:21,079 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:21,083 INFO L225 Difference]: With dead ends: 2678 [2022-02-11 00:41:21,083 INFO L226 Difference]: Without dead ends: 2665 [2022-02-11 00:41:21,083 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=2252, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:41:21,083 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:21,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 261 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:41:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-02-11 00:41:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1251. [2022-02-11 00:41:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.4424) internal successors, (3053), 1250 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3053 transitions. [2022-02-11 00:41:21,100 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3053 transitions. Word has length 29 [2022-02-11 00:41:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:21,100 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 3053 transitions. [2022-02-11 00:41:21,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3053 transitions. [2022-02-11 00:41:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:21,101 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:21,101 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:21,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:21,307 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,SelfDestructingSolverStorable77 [2022-02-11 00:41:21,307 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash 270558087, now seen corresponding path program 75 times [2022-02-11 00:41:21,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:21,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968394370] [2022-02-11 00:41:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:21,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:21,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968394370] [2022-02-11 00:41:21,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968394370] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:21,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805894553] [2022-02-11 00:41:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:41:21,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:21,572 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:21,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 00:41:21,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:41:21,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:21,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:41:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:21,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:21,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-02-11 00:41:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:22,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:22,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:22,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2022-02-11 00:41:22,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:41:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:22,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805894553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:22,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:22,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 35 [2022-02-11 00:41:22,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368854362] [2022-02-11 00:41:22,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:22,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:41:22,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:22,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:41:22,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:41:22,589 INFO L87 Difference]: Start difference. First operand 1251 states and 3053 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:26,151 INFO L93 Difference]: Finished difference Result 3559 states and 8954 transitions. [2022-02-11 00:41:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 00:41:26,151 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:26,156 INFO L225 Difference]: With dead ends: 3559 [2022-02-11 00:41:26,156 INFO L226 Difference]: Without dead ends: 3548 [2022-02-11 00:41:26,157 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1408, Invalid=7904, Unknown=0, NotChecked=0, Total=9312 [2022-02-11 00:41:26,158 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 301 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:26,158 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 168 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2042 Invalid, 0 Unknown, 593 Unchecked, 1.0s Time] [2022-02-11 00:41:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-02-11 00:41:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 1282. [2022-02-11 00:41:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 2.449648711943794) internal successors, (3138), 1281 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3138 transitions. [2022-02-11 00:41:26,189 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3138 transitions. Word has length 29 [2022-02-11 00:41:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:26,189 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 3138 transitions. [2022-02-11 00:41:26,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3138 transitions. [2022-02-11 00:41:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-11 00:41:26,191 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:26,191 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:26,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:26,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:26,407 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1146343377, now seen corresponding path program 76 times [2022-02-11 00:41:26,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:26,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884994613] [2022-02-11 00:41:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:26,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:26,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884994613] [2022-02-11 00:41:26,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884994613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:26,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87379981] [2022-02-11 00:41:26,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:41:26,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:26,636 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:26,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 00:41:26,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:41:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:26,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 00:41:26,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:26,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-02-11 00:41:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:26,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:27,050 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:27,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:27,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:27,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:27,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:27,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:41:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:27,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87379981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:27,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:27,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-02-11 00:41:27,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167337122] [2022-02-11 00:41:27,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:27,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:41:27,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:41:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:41:27,123 INFO L87 Difference]: Start difference. First operand 1282 states and 3138 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:29,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:29,027 INFO L93 Difference]: Finished difference Result 3481 states and 8703 transitions. [2022-02-11 00:41:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:41:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-02-11 00:41:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:29,033 INFO L225 Difference]: With dead ends: 3481 [2022-02-11 00:41:29,033 INFO L226 Difference]: Without dead ends: 3454 [2022-02-11 00:41:29,033 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=899, Invalid=4213, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:41:29,033 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 458 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:29,033 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 181 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1448 Invalid, 0 Unknown, 93 Unchecked, 0.6s Time] [2022-02-11 00:41:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2022-02-11 00:41:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 1237. [2022-02-11 00:41:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.4336569579288025) internal successors, (3008), 1236 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3008 transitions. [2022-02-11 00:41:29,053 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3008 transitions. Word has length 29 [2022-02-11 00:41:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:29,053 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 3008 transitions. [2022-02-11 00:41:29,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3008 transitions. [2022-02-11 00:41:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:29,054 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:29,055 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:29,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:29,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:29,271 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash 570757232, now seen corresponding path program 1 times [2022-02-11 00:41:29,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:29,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768522228] [2022-02-11 00:41:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:29,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:29,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768522228] [2022-02-11 00:41:29,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768522228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:29,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592890978] [2022-02-11 00:41:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:29,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:29,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:29,507 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:29,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 00:41:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:29,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:29,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:41:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:29,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:29,953 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:29,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:29,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:29,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:29,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:30,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592890978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:30,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:30,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:41:30,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269288946] [2022-02-11 00:41:30,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:30,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:30,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:30,022 INFO L87 Difference]: Start difference. First operand 1237 states and 3008 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:31,052 INFO L93 Difference]: Finished difference Result 2724 states and 6678 transitions. [2022-02-11 00:41:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:41:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:31,056 INFO L225 Difference]: With dead ends: 2724 [2022-02-11 00:41:31,056 INFO L226 Difference]: Without dead ends: 2714 [2022-02-11 00:41:31,056 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:41:31,056 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 527 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:31,056 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 298 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:41:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-02-11 00:41:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1240. [2022-02-11 00:41:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.4317998385794994) internal successors, (3013), 1239 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3013 transitions. [2022-02-11 00:41:31,074 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3013 transitions. Word has length 30 [2022-02-11 00:41:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:31,074 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 3013 transitions. [2022-02-11 00:41:31,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3013 transitions. [2022-02-11 00:41:31,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:31,075 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:31,075 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:31,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:31,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:31,292 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash 238679972, now seen corresponding path program 2 times [2022-02-11 00:41:31,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:31,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516794863] [2022-02-11 00:41:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:31,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:31,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516794863] [2022-02-11 00:41:31,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516794863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:31,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418683743] [2022-02-11 00:41:31,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:41:31,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:31,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:31,589 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:31,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 00:41:31,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:41:31,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:31,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:31,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:41:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:31,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:32,049 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:32,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:32,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:32,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:32,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:41:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:32,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418683743] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:32,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:32,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:41:32,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238589923] [2022-02-11 00:41:32,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:32,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:32,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:32,119 INFO L87 Difference]: Start difference. First operand 1240 states and 3013 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:33,284 INFO L93 Difference]: Finished difference Result 2858 states and 7045 transitions. [2022-02-11 00:41:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:41:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:33,288 INFO L225 Difference]: With dead ends: 2858 [2022-02-11 00:41:33,289 INFO L226 Difference]: Without dead ends: 2847 [2022-02-11 00:41:33,289 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=2026, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:41:33,289 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 294 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:33,289 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 316 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:41:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2022-02-11 00:41:33,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1271. [2022-02-11 00:41:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 2.437795275590551) internal successors, (3096), 1270 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 3096 transitions. [2022-02-11 00:41:33,309 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 3096 transitions. Word has length 30 [2022-02-11 00:41:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:33,309 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 3096 transitions. [2022-02-11 00:41:33,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 3096 transitions. [2022-02-11 00:41:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:33,311 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:33,311 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:33,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:33,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:33,527 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1995081022, now seen corresponding path program 3 times [2022-02-11 00:41:33,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:33,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962966922] [2022-02-11 00:41:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:33,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:33,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:33,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962966922] [2022-02-11 00:41:33,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962966922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:33,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98396471] [2022-02-11 00:41:33,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:41:33,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:33,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:33,736 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 00:41:33,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:41:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:33,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-11 00:41:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:34,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:34,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:41:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:34,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:34,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:41:34,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 28 [2022-02-11 00:41:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:34,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98396471] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:34,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:34,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 37 [2022-02-11 00:41:34,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884945187] [2022-02-11 00:41:34,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:41:34,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:34,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:41:34,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:41:34,814 INFO L87 Difference]: Start difference. First operand 1271 states and 3096 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:36,562 INFO L93 Difference]: Finished difference Result 2972 states and 7376 transitions. [2022-02-11 00:41:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:41:36,562 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:36,566 INFO L225 Difference]: With dead ends: 2972 [2022-02-11 00:41:36,566 INFO L226 Difference]: Without dead ends: 2959 [2022-02-11 00:41:36,567 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:41:36,567 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 381 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 932 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:36,567 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 177 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1425 Invalid, 0 Unknown, 932 Unchecked, 0.7s Time] [2022-02-11 00:41:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2022-02-11 00:41:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 1313. [2022-02-11 00:41:36,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.4405487804878048) internal successors, (3202), 1312 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3202 transitions. [2022-02-11 00:41:36,595 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3202 transitions. Word has length 30 [2022-02-11 00:41:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:36,596 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 3202 transitions. [2022-02-11 00:41:36,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3202 transitions. [2022-02-11 00:41:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:36,597 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:36,597 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:36,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-11 00:41:36,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:36,810 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:36,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1077130832, now seen corresponding path program 4 times [2022-02-11 00:41:36,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:36,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084167885] [2022-02-11 00:41:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:36,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:37,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:37,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084167885] [2022-02-11 00:41:37,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084167885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:37,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543786044] [2022-02-11 00:41:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:41:37,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:37,127 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:37,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 00:41:37,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:41:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:37,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:37,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:37,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:41:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:37,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:37,797 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:37,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:37,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:37,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:37,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:37,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543786044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:37,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:37,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:41:37,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890052743] [2022-02-11 00:41:37,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:37,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:37,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:37,898 INFO L87 Difference]: Start difference. First operand 1313 states and 3202 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:39,544 INFO L93 Difference]: Finished difference Result 3362 states and 8300 transitions. [2022-02-11 00:41:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:41:39,544 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:39,548 INFO L225 Difference]: With dead ends: 3362 [2022-02-11 00:41:39,548 INFO L226 Difference]: Without dead ends: 3340 [2022-02-11 00:41:39,549 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=2871, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:41:39,549 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 465 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:39,549 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 208 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:41:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2022-02-11 00:41:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 1263. [2022-02-11 00:41:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 2.4334389857369256) internal successors, (3071), 1262 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3071 transitions. [2022-02-11 00:41:39,568 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3071 transitions. Word has length 30 [2022-02-11 00:41:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 3071 transitions. [2022-02-11 00:41:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3071 transitions. [2022-02-11 00:41:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:39,569 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:39,570 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:39,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:39,782 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,SelfDestructingSolverStorable83 [2022-02-11 00:41:39,782 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:39,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1764442066, now seen corresponding path program 5 times [2022-02-11 00:41:39,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:39,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889295391] [2022-02-11 00:41:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:39,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:40,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:40,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889295391] [2022-02-11 00:41:40,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889295391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:40,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782588761] [2022-02-11 00:41:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:41:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:40,089 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:40,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 00:41:40,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:41:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:40,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:40,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:41:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:40,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:40,770 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:40,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:40,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:40,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:40,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:40,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782588761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:40,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:40,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:41:40,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208055888] [2022-02-11 00:41:40,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:40,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:40,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:40,866 INFO L87 Difference]: Start difference. First operand 1263 states and 3071 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:42,458 INFO L93 Difference]: Finished difference Result 2775 states and 6780 transitions. [2022-02-11 00:41:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:41:42,459 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:42,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:42,462 INFO L225 Difference]: With dead ends: 2775 [2022-02-11 00:41:42,462 INFO L226 Difference]: Without dead ends: 2755 [2022-02-11 00:41:42,463 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=398, Invalid=2152, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:41:42,463 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 436 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:42,463 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 296 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:41:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-02-11 00:41:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1261. [2022-02-11 00:41:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 2.433333333333333) internal successors, (3066), 1260 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3066 transitions. [2022-02-11 00:41:42,484 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3066 transitions. Word has length 30 [2022-02-11 00:41:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:42,484 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3066 transitions. [2022-02-11 00:41:42,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3066 transitions. [2022-02-11 00:41:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:42,486 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:42,486 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:42,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:42,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:42,703 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 892952774, now seen corresponding path program 6 times [2022-02-11 00:41:42,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:42,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130801448] [2022-02-11 00:41:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:42,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:43,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:43,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130801448] [2022-02-11 00:41:43,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130801448] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:43,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368725926] [2022-02-11 00:41:43,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:41:43,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:43,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:43,003 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:43,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 00:41:43,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:41:43,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:43,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:43,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:41:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:43,686 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:43,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:43,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:43,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:43,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:43,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368725926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:43,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:43,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:41:43,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641512739] [2022-02-11 00:41:43,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:43,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:43,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:43,790 INFO L87 Difference]: Start difference. First operand 1261 states and 3066 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:45,437 INFO L93 Difference]: Finished difference Result 2850 states and 6955 transitions. [2022-02-11 00:41:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:41:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:45,441 INFO L225 Difference]: With dead ends: 2850 [2022-02-11 00:41:45,441 INFO L226 Difference]: Without dead ends: 2813 [2022-02-11 00:41:45,441 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=362, Invalid=1990, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 00:41:45,441 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 450 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:45,441 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 329 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:41:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-02-11 00:41:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 1255. [2022-02-11 00:41:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 2.4330143540669855) internal successors, (3051), 1254 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 3051 transitions. [2022-02-11 00:41:45,458 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 3051 transitions. Word has length 30 [2022-02-11 00:41:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:45,459 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 3051 transitions. [2022-02-11 00:41:45,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 3051 transitions. [2022-02-11 00:41:45,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:45,460 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:45,460 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:45,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-11 00:41:45,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:45,676 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash -740451580, now seen corresponding path program 7 times [2022-02-11 00:41:45,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:45,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973065856] [2022-02-11 00:41:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:46,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:46,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973065856] [2022-02-11 00:41:46,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973065856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:46,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274570454] [2022-02-11 00:41:46,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:41:46,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:46,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:46,063 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:46,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 00:41:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:46,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:46,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:46,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:41:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:46,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:46,715 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:46,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:46,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:46,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:46,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:46,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:46,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274570454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:46,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:46,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:41:46,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130437669] [2022-02-11 00:41:46,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:46,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:46,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:46,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:46,823 INFO L87 Difference]: Start difference. First operand 1255 states and 3051 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:48,044 INFO L93 Difference]: Finished difference Result 2689 states and 6599 transitions. [2022-02-11 00:41:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:41:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:48,048 INFO L225 Difference]: With dead ends: 2689 [2022-02-11 00:41:48,048 INFO L226 Difference]: Without dead ends: 2679 [2022-02-11 00:41:48,048 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 00:41:48,048 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 411 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:48,048 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 291 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:41:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2022-02-11 00:41:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1255. [2022-02-11 00:41:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 2.4330143540669855) internal successors, (3051), 1254 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 3051 transitions. [2022-02-11 00:41:48,064 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 3051 transitions. Word has length 30 [2022-02-11 00:41:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:48,064 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 3051 transitions. [2022-02-11 00:41:48,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 3051 transitions. [2022-02-11 00:41:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:48,066 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:48,066 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:48,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:48,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:48,281 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1900961628, now seen corresponding path program 8 times [2022-02-11 00:41:48,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:48,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822398444] [2022-02-11 00:41:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:48,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:48,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822398444] [2022-02-11 00:41:48,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822398444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:48,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522118773] [2022-02-11 00:41:48,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:41:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:48,600 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:48,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 00:41:48,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:41:48,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:48,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:48,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:49,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:41:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:49,307 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:49,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:49,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:49,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:49,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:49,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:41:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:49,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522118773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:49,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:49,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:41:49,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054838589] [2022-02-11 00:41:49,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:49,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:49,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:49,401 INFO L87 Difference]: Start difference. First operand 1255 states and 3051 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:51,790 INFO L93 Difference]: Finished difference Result 2940 states and 7257 transitions. [2022-02-11 00:41:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:41:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:51,795 INFO L225 Difference]: With dead ends: 2940 [2022-02-11 00:41:51,795 INFO L226 Difference]: Without dead ends: 2929 [2022-02-11 00:41:51,795 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=430, Invalid=3730, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:41:51,796 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 404 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:51,796 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 284 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 00:41:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2022-02-11 00:41:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1292. [2022-02-11 00:41:51,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.436870642912471) internal successors, (3146), 1291 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3146 transitions. [2022-02-11 00:41:51,822 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3146 transitions. Word has length 30 [2022-02-11 00:41:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:51,822 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 3146 transitions. [2022-02-11 00:41:51,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3146 transitions. [2022-02-11 00:41:51,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:51,823 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:51,823 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:51,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:52,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:52,030 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:52,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:52,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1773518532, now seen corresponding path program 9 times [2022-02-11 00:41:52,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:52,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979536557] [2022-02-11 00:41:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:52,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:52,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979536557] [2022-02-11 00:41:52,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979536557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:52,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996067520] [2022-02-11 00:41:52,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:41:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:52,337 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:52,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 00:41:52,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:41:52,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:52,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:52,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:52,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:41:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:52,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:52,963 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:52,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:53,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:53,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:53,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:41:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:53,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996067520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:53,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:53,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:41:53,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980438877] [2022-02-11 00:41:53,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:41:53,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:41:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:41:53,066 INFO L87 Difference]: Start difference. First operand 1292 states and 3146 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:55,542 INFO L93 Difference]: Finished difference Result 3169 states and 7883 transitions. [2022-02-11 00:41:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:41:55,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:55,547 INFO L225 Difference]: With dead ends: 3169 [2022-02-11 00:41:55,547 INFO L226 Difference]: Without dead ends: 3150 [2022-02-11 00:41:55,548 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=630, Invalid=5070, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:41:55,548 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 512 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:55,548 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 216 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:41:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-02-11 00:41:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 1296. [2022-02-11 00:41:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 2.44015444015444) internal successors, (3160), 1295 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 3160 transitions. [2022-02-11 00:41:55,569 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 3160 transitions. Word has length 30 [2022-02-11 00:41:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:55,569 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 3160 transitions. [2022-02-11 00:41:55,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 3160 transitions. [2022-02-11 00:41:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:55,570 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:55,570 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:55,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-11 00:41:55,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:55,772 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1856245596, now seen corresponding path program 10 times [2022-02-11 00:41:55,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:55,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105393299] [2022-02-11 00:41:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:55,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:56,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:56,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105393299] [2022-02-11 00:41:56,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105393299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:56,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309793305] [2022-02-11 00:41:56,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:41:56,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:56,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:56,060 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:56,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 00:41:56,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:41:56,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:56,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:56,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:41:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:56,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:56,734 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:56,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:56,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:56,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:41:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:56,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309793305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:56,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:56,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:41:56,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833445911] [2022-02-11 00:41:56,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:56,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:41:56,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:41:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:41:56,792 INFO L87 Difference]: Start difference. First operand 1296 states and 3160 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:41:58,806 INFO L93 Difference]: Finished difference Result 3314 states and 8287 transitions. [2022-02-11 00:41:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:41:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:41:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:41:58,811 INFO L225 Difference]: With dead ends: 3314 [2022-02-11 00:41:58,811 INFO L226 Difference]: Without dead ends: 3286 [2022-02-11 00:41:58,811 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=4653, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 00:41:58,812 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 356 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:41:58,812 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 231 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:41:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2022-02-11 00:41:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1283. [2022-02-11 00:41:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.432917316692668) internal successors, (3119), 1282 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3119 transitions. [2022-02-11 00:41:58,833 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3119 transitions. Word has length 30 [2022-02-11 00:41:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:41:58,833 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3119 transitions. [2022-02-11 00:41:58,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:41:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3119 transitions. [2022-02-11 00:41:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:41:58,834 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:41:58,834 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:41:58,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-11 00:41:59,043 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,SelfDestructingSolverStorable89 [2022-02-11 00:41:59,043 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:41:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:41:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1433916058, now seen corresponding path program 11 times [2022-02-11 00:41:59,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:41:59,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508756110] [2022-02-11 00:41:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:41:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:41:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:41:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:59,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:41:59,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508756110] [2022-02-11 00:41:59,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508756110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:41:59,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122286569] [2022-02-11 00:41:59,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:41:59,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:41:59,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:41:59,298 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:41:59,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 00:41:59,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:41:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:41:59,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:41:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:41:59,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:41:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:59,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:41:59,847 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:41:59,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:41:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:41:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:41:59,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:41:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:41:59,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122286569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:41:59,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:41:59,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:41:59,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587880171] [2022-02-11 00:41:59,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:41:59,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:41:59,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:41:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:41:59,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:41:59,931 INFO L87 Difference]: Start difference. First operand 1283 states and 3119 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:01,981 INFO L93 Difference]: Finished difference Result 2936 states and 7248 transitions. [2022-02-11 00:42:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:42:01,981 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:01,993 INFO L225 Difference]: With dead ends: 2936 [2022-02-11 00:42:01,993 INFO L226 Difference]: Without dead ends: 2921 [2022-02-11 00:42:01,993 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=588, Invalid=4104, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:42:01,993 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 504 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:01,994 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 228 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:42:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2022-02-11 00:42:02,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1299. [2022-02-11 00:42:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.4352850539291215) internal successors, (3161), 1298 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3161 transitions. [2022-02-11 00:42:02,012 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3161 transitions. Word has length 30 [2022-02-11 00:42:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:02,012 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 3161 transitions. [2022-02-11 00:42:02,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3161 transitions. [2022-02-11 00:42:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:02,013 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:02,013 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:02,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:02,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:02,229 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 322484992, now seen corresponding path program 12 times [2022-02-11 00:42:02,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:02,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987790427] [2022-02-11 00:42:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:02,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:02,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:02,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987790427] [2022-02-11 00:42:02,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987790427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:02,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649545809] [2022-02-11 00:42:02,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:42:02,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:02,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:02,506 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:02,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 00:42:02,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:42:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:02,527 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:42:02,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:02,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:02,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:42:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:02,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:03,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:03,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:03,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:42:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:03,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649545809] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:03,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:03,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2022-02-11 00:42:03,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313923857] [2022-02-11 00:42:03,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:03,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:42:03,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:03,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:42:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:42:03,571 INFO L87 Difference]: Start difference. First operand 1299 states and 3161 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:08,783 INFO L93 Difference]: Finished difference Result 3343 states and 8375 transitions. [2022-02-11 00:42:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-11 00:42:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:08,788 INFO L225 Difference]: With dead ends: 3343 [2022-02-11 00:42:08,788 INFO L226 Difference]: Without dead ends: 3331 [2022-02-11 00:42:08,789 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4237 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1707, Invalid=10283, Unknown=0, NotChecked=0, Total=11990 [2022-02-11 00:42:08,789 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 628 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2307 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:08,789 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 158 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1654 Invalid, 0 Unknown, 2307 Unchecked, 0.8s Time] [2022-02-11 00:42:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-02-11 00:42:08,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 1483. [2022-02-11 00:42:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.4635627530364372) internal successors, (3651), 1482 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3651 transitions. [2022-02-11 00:42:08,813 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3651 transitions. Word has length 30 [2022-02-11 00:42:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:08,814 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 3651 transitions. [2022-02-11 00:42:08,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3651 transitions. [2022-02-11 00:42:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:08,815 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:08,815 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:08,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:09,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:09,017 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash -595465198, now seen corresponding path program 13 times [2022-02-11 00:42:09,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:09,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085379904] [2022-02-11 00:42:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:09,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:09,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085379904] [2022-02-11 00:42:09,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085379904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:09,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009593866] [2022-02-11 00:42:09,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:42:09,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:09,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:09,373 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:09,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:09,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:09,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 00:42:09,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:42:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:09,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:10,018 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:10,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:10,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:10,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:10,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009593866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:10,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:10,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:42:10,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605212175] [2022-02-11 00:42:10,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:10,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:42:10,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:42:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:42:10,120 INFO L87 Difference]: Start difference. First operand 1483 states and 3651 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:12,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:12,903 INFO L93 Difference]: Finished difference Result 3607 states and 8924 transitions. [2022-02-11 00:42:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 00:42:12,903 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:12,908 INFO L225 Difference]: With dead ends: 3607 [2022-02-11 00:42:12,909 INFO L226 Difference]: Without dead ends: 3579 [2022-02-11 00:42:12,909 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=996, Invalid=6836, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 00:42:12,910 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 540 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:12,910 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 148 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:42:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2022-02-11 00:42:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 1418. [2022-02-11 00:42:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 2.455892731122089) internal successors, (3480), 1417 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 3480 transitions. [2022-02-11 00:42:12,935 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 3480 transitions. Word has length 30 [2022-02-11 00:42:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:12,936 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 3480 transitions. [2022-02-11 00:42:12,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 3480 transitions. [2022-02-11 00:42:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:12,937 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:12,937 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:12,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:13,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:13,154 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash 857929200, now seen corresponding path program 14 times [2022-02-11 00:42:13,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:13,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671793271] [2022-02-11 00:42:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:13,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:13,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671793271] [2022-02-11 00:42:13,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671793271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:13,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043757553] [2022-02-11 00:42:13,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:42:13,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:13,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:13,406 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:13,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 00:42:13,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:42:13,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:13,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:42:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:13,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:13,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:42:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:13,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:14,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:14,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:14,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:14,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:42:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:14,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043757553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:14,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:14,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-02-11 00:42:14,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130917321] [2022-02-11 00:42:14,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:14,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:42:14,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:42:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:42:14,277 INFO L87 Difference]: Start difference. First operand 1418 states and 3480 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:18,137 INFO L93 Difference]: Finished difference Result 3142 states and 7746 transitions. [2022-02-11 00:42:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-11 00:42:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:18,141 INFO L225 Difference]: With dead ends: 3142 [2022-02-11 00:42:18,141 INFO L226 Difference]: Without dead ends: 3109 [2022-02-11 00:42:18,142 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1221, Invalid=7709, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 00:42:18,142 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 425 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1906 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:18,142 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 206 Invalid, 3828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1731 Invalid, 0 Unknown, 1906 Unchecked, 0.8s Time] [2022-02-11 00:42:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-02-11 00:42:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1569. [2022-02-11 00:42:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 2.4846938775510203) internal successors, (3896), 1568 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 3896 transitions. [2022-02-11 00:42:18,174 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 3896 transitions. Word has length 30 [2022-02-11 00:42:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:18,174 INFO L470 AbstractCegarLoop]: Abstraction has 1569 states and 3896 transitions. [2022-02-11 00:42:18,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 3896 transitions. [2022-02-11 00:42:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:18,175 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:18,176 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:18,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-11 00:42:18,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:18,391 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -406049408, now seen corresponding path program 15 times [2022-02-11 00:42:18,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:18,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329592166] [2022-02-11 00:42:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:18,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:18,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:18,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329592166] [2022-02-11 00:42:18,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329592166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:18,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93780909] [2022-02-11 00:42:18,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:42:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:18,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:18,704 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 00:42:18,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 00:42:18,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:42:18,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:18,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:42:18,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:18,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:18,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-02-11 00:42:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:19,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:19,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:19,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:42:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:19,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93780909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:19,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:19,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-02-11 00:42:19,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761119292] [2022-02-11 00:42:19,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:19,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-11 00:42:19,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-11 00:42:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:42:19,693 INFO L87 Difference]: Start difference. First operand 1569 states and 3896 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) 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) [2022-02-11 00:42:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:23,198 INFO L93 Difference]: Finished difference Result 3735 states and 9323 transitions. [2022-02-11 00:42:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 00:42:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) 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) Word has length 30 [2022-02-11 00:42:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:23,203 INFO L225 Difference]: With dead ends: 3735 [2022-02-11 00:42:23,203 INFO L226 Difference]: Without dead ends: 3724 [2022-02-11 00:42:23,204 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3387 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1640, Invalid=8662, Unknown=0, NotChecked=0, Total=10302 [2022-02-11 00:42:23,204 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 726 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1261 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:23,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 163 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 1537 Invalid, 0 Unknown, 1261 Unchecked, 0.8s Time] [2022-02-11 00:42:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2022-02-11 00:42:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 1584. [2022-02-11 00:42:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.4857864813644976) internal successors, (3935), 1583 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 3935 transitions. [2022-02-11 00:42:23,227 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 3935 transitions. Word has length 30 [2022-02-11 00:42:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:23,228 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 3935 transitions. [2022-02-11 00:42:23,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) 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) [2022-02-11 00:42:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 3935 transitions. [2022-02-11 00:42:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:23,229 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:23,229 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:23,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:23,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:23,445 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1350351642, now seen corresponding path program 16 times [2022-02-11 00:42:23,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:23,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221523851] [2022-02-11 00:42:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:23,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:23,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221523851] [2022-02-11 00:42:23,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221523851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:23,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306392034] [2022-02-11 00:42:23,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:42:23,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:23,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:23,667 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) [2022-02-11 00:42:23,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-11 00:42:23,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:42:23,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:23,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:23,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:23,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:42:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:23,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:24,097 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:24,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:24,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:24,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:24,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306392034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:24,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:24,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:42:24,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241006786] [2022-02-11 00:42:24,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:24,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:42:24,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:24,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:42:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:42:24,163 INFO L87 Difference]: Start difference. First operand 1584 states and 3935 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:25,886 INFO L93 Difference]: Finished difference Result 3551 states and 8901 transitions. [2022-02-11 00:42:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:42:25,886 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:25,891 INFO L225 Difference]: With dead ends: 3551 [2022-02-11 00:42:25,891 INFO L226 Difference]: Without dead ends: 3531 [2022-02-11 00:42:25,892 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=628, Invalid=3532, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:42:25,892 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 425 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:25,892 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 217 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:42:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2022-02-11 00:42:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 1587. [2022-02-11 00:42:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.4836065573770494) internal successors, (3939), 1586 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3939 transitions. [2022-02-11 00:42:25,919 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3939 transitions. Word has length 30 [2022-02-11 00:42:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:25,919 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 3939 transitions. [2022-02-11 00:42:25,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3939 transitions. [2022-02-11 00:42:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:25,921 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:25,921 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:25,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-11 00:42:26,135 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,SelfDestructingSolverStorable95 [2022-02-11 00:42:26,135 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1885795850, now seen corresponding path program 17 times [2022-02-11 00:42:26,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:26,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860410422] [2022-02-11 00:42:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:26,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:26,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:26,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860410422] [2022-02-11 00:42:26,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860410422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:26,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732098344] [2022-02-11 00:42:26,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:42:26,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:26,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:26,351 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) [2022-02-11 00:42:26,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-11 00:42:26,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:42:26,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:26,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:26,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:42:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:26,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:26,881 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:26,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:26,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:26,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:26,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:26,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732098344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:26,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:26,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:42:26,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591778282] [2022-02-11 00:42:26,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:26,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:42:26,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:26,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:42:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:42:26,965 INFO L87 Difference]: Start difference. First operand 1587 states and 3939 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:28,922 INFO L93 Difference]: Finished difference Result 3077 states and 7623 transitions. [2022-02-11 00:42:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:42:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:28,926 INFO L225 Difference]: With dead ends: 3077 [2022-02-11 00:42:28,926 INFO L226 Difference]: Without dead ends: 3051 [2022-02-11 00:42:28,927 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=530, Invalid=3376, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:42:28,927 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 581 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:28,927 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 208 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:42:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-02-11 00:42:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1587. [2022-02-11 00:42:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.48234552332913) internal successors, (3937), 1586 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3937 transitions. [2022-02-11 00:42:28,948 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3937 transitions. Word has length 30 [2022-02-11 00:42:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:28,948 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 3937 transitions. [2022-02-11 00:42:28,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3937 transitions. [2022-02-11 00:42:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:28,950 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:28,950 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:28,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:29,166 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,SelfDestructingSolverStorable96 [2022-02-11 00:42:29,166 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:29,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:29,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2004425308, now seen corresponding path program 18 times [2022-02-11 00:42:29,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:29,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002318019] [2022-02-11 00:42:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:29,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:29,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:29,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002318019] [2022-02-11 00:42:29,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002318019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:29,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083240969] [2022-02-11 00:42:29,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:42:29,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:29,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:29,493 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) [2022-02-11 00:42:29,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-11 00:42:29,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:42:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:29,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:29,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:29,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:42:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:30,178 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:30,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:30,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:30,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:30,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:30,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:30,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083240969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:30,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:30,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:42:30,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104430577] [2022-02-11 00:42:30,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:30,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:42:30,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:42:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:42:30,263 INFO L87 Difference]: Start difference. First operand 1587 states and 3937 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:32,555 INFO L93 Difference]: Finished difference Result 3144 states and 7787 transitions. [2022-02-11 00:42:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:42:32,555 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:32,559 INFO L225 Difference]: With dead ends: 3144 [2022-02-11 00:42:32,559 INFO L226 Difference]: Without dead ends: 3086 [2022-02-11 00:42:32,559 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=510, Invalid=3272, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:42:32,562 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 535 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:32,562 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 271 Invalid, 3036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:42:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2022-02-11 00:42:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 1583. [2022-02-11 00:42:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.4804045512010116) internal successors, (3924), 1582 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 3924 transitions. [2022-02-11 00:42:32,583 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 3924 transitions. Word has length 30 [2022-02-11 00:42:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:32,583 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 3924 transitions. [2022-02-11 00:42:32,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 3924 transitions. [2022-02-11 00:42:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:32,585 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:32,585 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:32,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-11 00:42:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:32,799 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2103294352, now seen corresponding path program 19 times [2022-02-11 00:42:32,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:32,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447198195] [2022-02-11 00:42:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:32,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:33,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:33,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447198195] [2022-02-11 00:42:33,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447198195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:33,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030465448] [2022-02-11 00:42:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:42:33,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:33,128 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) [2022-02-11 00:42:33,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-11 00:42:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:33,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:33,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:42:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:33,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:33,774 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:33,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:33,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:33,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:42:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:33,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030465448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:33,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:33,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:42:33,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468185946] [2022-02-11 00:42:33,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:33,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:42:33,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:33,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:42:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:42:33,870 INFO L87 Difference]: Start difference. First operand 1583 states and 3924 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:35,587 INFO L93 Difference]: Finished difference Result 3395 states and 8465 transitions. [2022-02-11 00:42:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:42:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:35,593 INFO L225 Difference]: With dead ends: 3395 [2022-02-11 00:42:35,593 INFO L226 Difference]: Without dead ends: 3360 [2022-02-11 00:42:35,593 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=560, Invalid=3600, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:42:35,593 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 464 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2210 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:35,594 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 237 Invalid, 2421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2210 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:42:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2022-02-11 00:42:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 1569. [2022-02-11 00:42:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 2.482142857142857) internal successors, (3892), 1568 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 3892 transitions. [2022-02-11 00:42:35,617 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 3892 transitions. Word has length 30 [2022-02-11 00:42:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:35,618 INFO L470 AbstractCegarLoop]: Abstraction has 1569 states and 3892 transitions. [2022-02-11 00:42:35,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 3892 transitions. [2022-02-11 00:42:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:35,619 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:35,619 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:35,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:35,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:35,836 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:35,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1275517680, now seen corresponding path program 20 times [2022-02-11 00:42:35,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:35,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573840730] [2022-02-11 00:42:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:36,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:36,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573840730] [2022-02-11 00:42:36,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573840730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:36,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094679649] [2022-02-11 00:42:36,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:42:36,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:36,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:36,146 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) [2022-02-11 00:42:36,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-11 00:42:36,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:42:36,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:36,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:42:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:36,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:36,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-02-11 00:42:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:36,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:37,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:37,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:37,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:37,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:42:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:37,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094679649] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:37,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:37,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2022-02-11 00:42:37,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80745816] [2022-02-11 00:42:37,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:37,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:42:37,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:42:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:42:37,439 INFO L87 Difference]: Start difference. First operand 1569 states and 3892 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:40,104 INFO L93 Difference]: Finished difference Result 3322 states and 8330 transitions. [2022-02-11 00:42:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:42:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:40,109 INFO L225 Difference]: With dead ends: 3322 [2022-02-11 00:42:40,109 INFO L226 Difference]: Without dead ends: 3307 [2022-02-11 00:42:40,110 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1010, Invalid=5796, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:42:40,110 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 428 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1757 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:40,110 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 231 Invalid, 3714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1759 Invalid, 0 Unknown, 1757 Unchecked, 0.8s Time] [2022-02-11 00:42:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2022-02-11 00:42:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 1679. [2022-02-11 00:42:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.498212157330155) internal successors, (4192), 1678 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4192 transitions. [2022-02-11 00:42:40,139 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4192 transitions. Word has length 30 [2022-02-11 00:42:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:40,139 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 4192 transitions. [2022-02-11 00:42:40,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4192 transitions. [2022-02-11 00:42:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:40,153 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:40,153 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:40,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:40,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-11 00:42:40,370 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash 480883370, now seen corresponding path program 21 times [2022-02-11 00:42:40,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:40,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59358395] [2022-02-11 00:42:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:40,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:40,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59358395] [2022-02-11 00:42:40,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59358395] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:40,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138821370] [2022-02-11 00:42:40,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:42:40,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:40,651 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) [2022-02-11 00:42:40,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-11 00:42:40,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:42:40,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:40,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:40,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:42:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:40,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:41,208 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:41,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:41,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:41,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138821370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:41,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:41,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:42:41,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480842195] [2022-02-11 00:42:41,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:41,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:42:41,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:42:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:42:41,287 INFO L87 Difference]: Start difference. First operand 1679 states and 4192 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:42,993 INFO L93 Difference]: Finished difference Result 4016 states and 10111 transitions. [2022-02-11 00:42:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:42:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:42,999 INFO L225 Difference]: With dead ends: 4016 [2022-02-11 00:42:42,999 INFO L226 Difference]: Without dead ends: 3989 [2022-02-11 00:42:43,000 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=633, Invalid=4197, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:42:43,000 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 468 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:43,000 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 316 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:42:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2022-02-11 00:42:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 1718. [2022-02-11 00:42:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 2.498543972044263) internal successors, (4290), 1717 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 4290 transitions. [2022-02-11 00:42:43,026 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 4290 transitions. Word has length 30 [2022-02-11 00:42:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:43,026 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 4290 transitions. [2022-02-11 00:42:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 4290 transitions. [2022-02-11 00:42:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:43,028 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:43,028 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:43,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:43,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:43,244 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1016327578, now seen corresponding path program 22 times [2022-02-11 00:42:43,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:43,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377308789] [2022-02-11 00:42:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:43,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:43,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:43,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377308789] [2022-02-11 00:42:43,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377308789] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:43,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65847663] [2022-02-11 00:42:43,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:42:43,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:43,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:43,433 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) [2022-02-11 00:42:43,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-11 00:42:43,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:42:43,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:43,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:43,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:43,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:42:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:43,978 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:43,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:44,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:44,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:44,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:44,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65847663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:44,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:44,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:42:44,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781609734] [2022-02-11 00:42:44,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:44,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:42:44,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:44,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:42:44,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:42:44,074 INFO L87 Difference]: Start difference. First operand 1718 states and 4290 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:45,816 INFO L93 Difference]: Finished difference Result 3433 states and 8503 transitions. [2022-02-11 00:42:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:42:45,816 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:45,821 INFO L225 Difference]: With dead ends: 3433 [2022-02-11 00:42:45,821 INFO L226 Difference]: Without dead ends: 3406 [2022-02-11 00:42:45,821 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=515, Invalid=3517, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:42:45,821 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 404 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:45,821 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 325 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:42:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2022-02-11 00:42:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 1726. [2022-02-11 00:42:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.497391304347826) internal successors, (4308), 1725 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 4308 transitions. [2022-02-11 00:42:45,849 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 4308 transitions. Word has length 30 [2022-02-11 00:42:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:45,850 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 4308 transitions. [2022-02-11 00:42:45,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 4308 transitions. [2022-02-11 00:42:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:45,851 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:45,852 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:46,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:46,067 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:46,067 INFO L85 PathProgramCache]: Analyzing trace with hash -621244878, now seen corresponding path program 23 times [2022-02-11 00:42:46,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:46,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529949013] [2022-02-11 00:42:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:46,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:46,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:46,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529949013] [2022-02-11 00:42:46,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529949013] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:46,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378603459] [2022-02-11 00:42:46,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:42:46,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:46,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:46,347 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) [2022-02-11 00:42:46,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-11 00:42:46,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:42:46,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:46,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:46,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:46,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:42:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:46,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:46,805 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:46,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:46,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:46,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:46,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:46,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378603459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:46,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:46,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:42:46,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000447190] [2022-02-11 00:42:46,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:46,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:42:46,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:42:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:42:46,866 INFO L87 Difference]: Start difference. First operand 1726 states and 4308 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:48,560 INFO L93 Difference]: Finished difference Result 3571 states and 8829 transitions. [2022-02-11 00:42:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:42:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:48,565 INFO L225 Difference]: With dead ends: 3571 [2022-02-11 00:42:48,565 INFO L226 Difference]: Without dead ends: 3516 [2022-02-11 00:42:48,566 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=476, Invalid=3184, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:42:48,566 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 498 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:48,566 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 329 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2731 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:42:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2022-02-11 00:42:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 1723. [2022-02-11 00:42:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.494773519163763) internal successors, (4296), 1722 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 4296 transitions. [2022-02-11 00:42:48,592 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 4296 transitions. Word has length 30 [2022-02-11 00:42:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:48,592 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 4296 transitions. [2022-02-11 00:42:48,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 4296 transitions. [2022-02-11 00:42:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:48,594 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:48,594 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:48,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-11 00:42:48,801 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,SelfDestructingSolverStorable102 [2022-02-11 00:42:48,802 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2040318064, now seen corresponding path program 24 times [2022-02-11 00:42:48,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:48,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141490532] [2022-02-11 00:42:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:48,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:49,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:49,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141490532] [2022-02-11 00:42:49,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141490532] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:49,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603430402] [2022-02-11 00:42:49,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:42:49,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:49,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:49,093 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) [2022-02-11 00:42:49,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-11 00:42:49,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:42:49,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:49,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:42:49,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:49,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:49,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 37 [2022-02-11 00:42:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:49,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:50,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:50,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:50,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:42:50,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:42:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:50,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603430402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:50,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:50,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-02-11 00:42:50,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373710232] [2022-02-11 00:42:50,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:50,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:42:50,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:42:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:42:50,370 INFO L87 Difference]: Start difference. First operand 1723 states and 4296 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:51,943 INFO L93 Difference]: Finished difference Result 2964 states and 7382 transitions. [2022-02-11 00:42:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:42:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:51,947 INFO L225 Difference]: With dead ends: 2964 [2022-02-11 00:42:51,947 INFO L226 Difference]: Without dead ends: 2951 [2022-02-11 00:42:51,948 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=606, Invalid=2934, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:42:51,948 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:51,948 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 213 Invalid, 2618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 968 Invalid, 0 Unknown, 1527 Unchecked, 0.5s Time] [2022-02-11 00:42:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-02-11 00:42:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 1741. [2022-02-11 00:42:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.4936781609195404) internal successors, (4339), 1740 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4339 transitions. [2022-02-11 00:42:51,971 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4339 transitions. Word has length 30 [2022-02-11 00:42:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:51,971 INFO L470 AbstractCegarLoop]: Abstraction has 1741 states and 4339 transitions. [2022-02-11 00:42:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4339 transitions. [2022-02-11 00:42:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:51,973 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:51,973 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:51,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-11 00:42:52,173 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,SelfDestructingSolverStorable103 [2022-02-11 00:42:52,174 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:52,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1463983528, now seen corresponding path program 25 times [2022-02-11 00:42:52,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:52,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172675823] [2022-02-11 00:42:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:52,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:52,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:52,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172675823] [2022-02-11 00:42:52,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172675823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:52,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234166185] [2022-02-11 00:42:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:42:52,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:52,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:52,465 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) [2022-02-11 00:42:52,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-11 00:42:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:52,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:52,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:42:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:52,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:53,123 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:53,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:53,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:53,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:53,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:42:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:53,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234166185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:53,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:53,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:42:53,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938145021] [2022-02-11 00:42:53,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:53,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:42:53,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:42:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:42:53,211 INFO L87 Difference]: Start difference. First operand 1741 states and 4339 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:54,793 INFO L93 Difference]: Finished difference Result 3877 states and 9722 transitions. [2022-02-11 00:42:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:42:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:54,799 INFO L225 Difference]: With dead ends: 3877 [2022-02-11 00:42:54,799 INFO L226 Difference]: Without dead ends: 3846 [2022-02-11 00:42:54,799 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=552, Invalid=3738, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:42:54,799 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 432 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:54,799 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 307 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:42:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2022-02-11 00:42:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 1723. [2022-02-11 00:42:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.491869918699187) internal successors, (4291), 1722 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 4291 transitions. [2022-02-11 00:42:54,826 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 4291 transitions. Word has length 30 [2022-02-11 00:42:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:54,826 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 4291 transitions. [2022-02-11 00:42:54,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 4291 transitions. [2022-02-11 00:42:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:54,828 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:54,828 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:54,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-11 00:42:55,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:55,036 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:55,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash 797633524, now seen corresponding path program 1 times [2022-02-11 00:42:55,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:55,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042865276] [2022-02-11 00:42:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:55,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:55,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042865276] [2022-02-11 00:42:55,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042865276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:55,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788234648] [2022-02-11 00:42:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:55,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:55,291 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) [2022-02-11 00:42:55,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-11 00:42:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:55,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:55,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:42:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:55,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:55,771 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:55,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:42:55,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:55,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:55,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:55,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:55,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788234648] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:55,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:55,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:42:55,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002467526] [2022-02-11 00:42:55,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:55,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:42:55,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:55,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:42:55,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:42:55,863 INFO L87 Difference]: Start difference. First operand 1723 states and 4291 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:57,121 INFO L93 Difference]: Finished difference Result 3562 states and 8845 transitions. [2022-02-11 00:42:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:42:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:57,126 INFO L225 Difference]: With dead ends: 3562 [2022-02-11 00:42:57,127 INFO L226 Difference]: Without dead ends: 3552 [2022-02-11 00:42:57,127 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=2125, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:42:57,127 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 471 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:57,127 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 392 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:42:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2022-02-11 00:42:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 1761. [2022-02-11 00:42:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.484659090909091) internal successors, (4373), 1760 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4373 transitions. [2022-02-11 00:42:57,152 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4373 transitions. Word has length 30 [2022-02-11 00:42:57,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:42:57,152 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 4373 transitions. [2022-02-11 00:42:57,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4373 transitions. [2022-02-11 00:42:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:42:57,154 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:42:57,154 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:42:57,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-11 00:42:57,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:57,364 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:42:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:42:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 220952366, now seen corresponding path program 2 times [2022-02-11 00:42:57,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:42:57,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236113855] [2022-02-11 00:42:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:42:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:42:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:42:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:57,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:42:57,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236113855] [2022-02-11 00:42:57,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236113855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:42:57,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118847975] [2022-02-11 00:42:57,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:42:57,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:42:57,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:42:57,689 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) [2022-02-11 00:42:57,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-11 00:42:57,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:42:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:42:57,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:42:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:42:57,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:42:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:58,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:42:58,245 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:42:58,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:42:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:42:58,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:42:58,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:42:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:42:58,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118847975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:42:58,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:42:58,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:42:58,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397789710] [2022-02-11 00:42:58,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:42:58,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:42:58,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:42:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:42:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:42:58,337 INFO L87 Difference]: Start difference. First operand 1761 states and 4373 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:42:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:42:59,987 INFO L93 Difference]: Finished difference Result 3597 states and 8974 transitions. [2022-02-11 00:42:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-11 00:42:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:42:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:42:59,992 INFO L225 Difference]: With dead ends: 3597 [2022-02-11 00:42:59,993 INFO L226 Difference]: Without dead ends: 3586 [2022-02-11 00:42:59,993 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:42:59,993 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 380 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:42:59,993 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 230 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:42:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2022-02-11 00:43:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 1785. [2022-02-11 00:43:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 2.4887892376681613) internal successors, (4440), 1784 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 4440 transitions. [2022-02-11 00:43:00,023 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 4440 transitions. Word has length 30 [2022-02-11 00:43:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:00,023 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 4440 transitions. [2022-02-11 00:43:00,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 4440 transitions. [2022-02-11 00:43:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:00,025 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:00,025 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:00,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:00,240 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,SelfDestructingSolverStorable106 [2022-02-11 00:43:00,240 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1977353416, now seen corresponding path program 3 times [2022-02-11 00:43:00,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:00,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688872592] [2022-02-11 00:43:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:00,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:00,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688872592] [2022-02-11 00:43:00,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688872592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:00,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254763391] [2022-02-11 00:43:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:43:00,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:00,503 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) [2022-02-11 00:43:00,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-11 00:43:00,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:43:00,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:00,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:43:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:00,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:00,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:43:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:01,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:01,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:01,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:01,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-11 00:43:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:01,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254763391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:01,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:01,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 35 [2022-02-11 00:43:01,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188303714] [2022-02-11 00:43:01,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:01,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:43:01,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:43:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:43:01,825 INFO L87 Difference]: Start difference. First operand 1785 states and 4440 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:03,661 INFO L93 Difference]: Finished difference Result 3139 states and 7873 transitions. [2022-02-11 00:43:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:43:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:03,666 INFO L225 Difference]: With dead ends: 3139 [2022-02-11 00:43:03,666 INFO L226 Difference]: Without dead ends: 3132 [2022-02-11 00:43:03,666 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=573, Invalid=4257, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:43:03,666 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 366 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2018 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:03,666 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 236 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1008 Invalid, 0 Unknown, 2018 Unchecked, 0.5s Time] [2022-02-11 00:43:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2022-02-11 00:43:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1865. [2022-02-11 00:43:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.491952789699571) internal successors, (4645), 1864 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4645 transitions. [2022-02-11 00:43:03,689 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4645 transitions. Word has length 30 [2022-02-11 00:43:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:03,689 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 4645 transitions. [2022-02-11 00:43:03,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4645 transitions. [2022-02-11 00:43:03,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:03,691 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:03,691 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:03,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:03,907 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,SelfDestructingSolverStorable107 [2022-02-11 00:43:03,907 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash 266455112, now seen corresponding path program 4 times [2022-02-11 00:43:03,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:03,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55642063] [2022-02-11 00:43:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:04,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:04,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55642063] [2022-02-11 00:43:04,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55642063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:04,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715817235] [2022-02-11 00:43:04,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:43:04,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:04,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:04,213 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) [2022-02-11 00:43:04,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-11 00:43:04,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:43:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:04,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:04,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:43:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:04,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:04,803 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:04,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:04,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:04,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:04,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:04,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715817235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:04,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:04,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:43:04,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371755702] [2022-02-11 00:43:04,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:04,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:43:04,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:43:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:43:04,896 INFO L87 Difference]: Start difference. First operand 1865 states and 4645 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:06,666 INFO L93 Difference]: Finished difference Result 4143 states and 10367 transitions. [2022-02-11 00:43:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:43:06,666 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:06,672 INFO L225 Difference]: With dead ends: 4143 [2022-02-11 00:43:06,673 INFO L226 Difference]: Without dead ends: 4117 [2022-02-11 00:43:06,673 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=377, Invalid=2379, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:43:06,673 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 365 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:06,673 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 281 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:43:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2022-02-11 00:43:06,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 1795. [2022-02-11 00:43:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 2.4849498327759196) internal successors, (4458), 1794 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 4458 transitions. [2022-02-11 00:43:06,701 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 4458 transitions. Word has length 30 [2022-02-11 00:43:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:06,701 INFO L470 AbstractCegarLoop]: Abstraction has 1795 states and 4458 transitions. [2022-02-11 00:43:06,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 4458 transitions. [2022-02-11 00:43:06,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:06,727 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:06,728 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:06,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:06,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:06,943 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:06,944 INFO L85 PathProgramCache]: Analyzing trace with hash 406013504, now seen corresponding path program 5 times [2022-02-11 00:43:06,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:06,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675038082] [2022-02-11 00:43:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:07,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:07,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675038082] [2022-02-11 00:43:07,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675038082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:07,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790462881] [2022-02-11 00:43:07,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:43:07,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:07,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:07,255 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) [2022-02-11 00:43:07,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-11 00:43:07,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:43:07,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:07,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:07,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:43:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:07,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:07,940 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:07,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:08,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:08,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790462881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:08,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:08,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:43:08,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664515168] [2022-02-11 00:43:08,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:08,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:43:08,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:43:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:43:08,042 INFO L87 Difference]: Start difference. First operand 1795 states and 4458 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:09,508 INFO L93 Difference]: Finished difference Result 3791 states and 9382 transitions. [2022-02-11 00:43:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:43:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:09,514 INFO L225 Difference]: With dead ends: 3791 [2022-02-11 00:43:09,514 INFO L226 Difference]: Without dead ends: 3768 [2022-02-11 00:43:09,514 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=2521, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:43:09,514 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 468 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 2453 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:09,514 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 328 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:43:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2022-02-11 00:43:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 1789. [2022-02-11 00:43:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 2.483780760626398) internal successors, (4441), 1788 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 4441 transitions. [2022-02-11 00:43:09,544 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 4441 transitions. Word has length 30 [2022-02-11 00:43:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:09,544 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 4441 transitions. [2022-02-11 00:43:09,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 4441 transitions. [2022-02-11 00:43:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:09,546 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:09,546 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:09,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:09,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:09,759 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -907231520, now seen corresponding path program 6 times [2022-02-11 00:43:09,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:09,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976635528] [2022-02-11 00:43:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:09,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:09,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:09,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976635528] [2022-02-11 00:43:09,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976635528] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:09,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138180533] [2022-02-11 00:43:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:43:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:09,975 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) [2022-02-11 00:43:09,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-11 00:43:09,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:43:09,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:10,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:10,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:10,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:43:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:10,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:10,482 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:10,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:10,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:10,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:10,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:10,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138180533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:10,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:10,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:43:10,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051986591] [2022-02-11 00:43:10,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:10,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:43:10,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:43:10,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:43:10,569 INFO L87 Difference]: Start difference. First operand 1789 states and 4441 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:12,193 INFO L93 Difference]: Finished difference Result 3496 states and 8687 transitions. [2022-02-11 00:43:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:43:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:12,198 INFO L225 Difference]: With dead ends: 3496 [2022-02-11 00:43:12,198 INFO L226 Difference]: Without dead ends: 3486 [2022-02-11 00:43:12,199 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:43:12,199 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 475 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:12,199 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 379 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:43:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2022-02-11 00:43:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 1786. [2022-02-11 00:43:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.484033613445378) internal successors, (4434), 1785 states have internal predecessors, (4434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 4434 transitions. [2022-02-11 00:43:12,223 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 4434 transitions. Word has length 30 [2022-02-11 00:43:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:12,223 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 4434 transitions. [2022-02-11 00:43:12,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 4434 transitions. [2022-02-11 00:43:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:12,225 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:12,225 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:12,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:12,440 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,SelfDestructingSolverStorable110 [2022-02-11 00:43:12,440 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2107543106, now seen corresponding path program 7 times [2022-02-11 00:43:12,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:12,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858576478] [2022-02-11 00:43:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:12,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:12,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858576478] [2022-02-11 00:43:12,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858576478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:12,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378506423] [2022-02-11 00:43:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:43:12,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:12,766 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) [2022-02-11 00:43:12,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-11 00:43:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:12,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:13,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:43:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:13,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:13,411 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:13,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:43:13,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:13,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:13,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:13,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:13,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378506423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:13,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:13,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:43:13,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836091876] [2022-02-11 00:43:13,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:43:13,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:43:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:43:13,513 INFO L87 Difference]: Start difference. First operand 1786 states and 4434 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:15,051 INFO L93 Difference]: Finished difference Result 3593 states and 8975 transitions. [2022-02-11 00:43:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:43:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:15,056 INFO L225 Difference]: With dead ends: 3593 [2022-02-11 00:43:15,056 INFO L226 Difference]: Without dead ends: 3582 [2022-02-11 00:43:15,057 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=336, Invalid=2526, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:43:15,057 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 327 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:15,057 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 235 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:43:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-02-11 00:43:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 1828. [2022-02-11 00:43:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.4893267651888342) internal successors, (4548), 1827 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4548 transitions. [2022-02-11 00:43:15,085 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4548 transitions. Word has length 30 [2022-02-11 00:43:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:15,085 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 4548 transitions. [2022-02-11 00:43:15,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4548 transitions. [2022-02-11 00:43:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:15,087 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:15,087 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:15,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:15,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-11 00:43:15,299 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash -431023140, now seen corresponding path program 8 times [2022-02-11 00:43:15,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:15,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376494299] [2022-02-11 00:43:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:15,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:15,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376494299] [2022-02-11 00:43:15,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376494299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:15,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873537797] [2022-02-11 00:43:15,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:15,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:15,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:15,585 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) [2022-02-11 00:43:15,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-11 00:43:15,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:15,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:15,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:43:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:15,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:15,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-11 00:43:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:16,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:16,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:16,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:16,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:43:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:16,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873537797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:16,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:16,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2022-02-11 00:43:16,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685148485] [2022-02-11 00:43:16,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:16,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:43:16,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:16,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:43:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:43:16,525 INFO L87 Difference]: Start difference. First operand 1828 states and 4548 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:19,028 INFO L93 Difference]: Finished difference Result 3834 states and 9707 transitions. [2022-02-11 00:43:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-11 00:43:19,028 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:19,033 INFO L225 Difference]: With dead ends: 3834 [2022-02-11 00:43:19,034 INFO L226 Difference]: Without dead ends: 3820 [2022-02-11 00:43:19,034 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1026, Invalid=5454, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 00:43:19,034 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 561 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2278 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:19,034 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 172 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1020 Invalid, 0 Unknown, 2278 Unchecked, 0.4s Time] [2022-02-11 00:43:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2022-02-11 00:43:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 1896. [2022-02-11 00:43:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.491820580474934) internal successors, (4722), 1895 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 4722 transitions. [2022-02-11 00:43:19,060 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 4722 transitions. Word has length 30 [2022-02-11 00:43:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:19,060 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 4722 transitions. [2022-02-11 00:43:19,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 4722 transitions. [2022-02-11 00:43:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:19,062 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:19,062 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:19,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:19,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-11 00:43:19,275 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1348973330, now seen corresponding path program 9 times [2022-02-11 00:43:19,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:19,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120747338] [2022-02-11 00:43:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:19,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:19,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:19,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120747338] [2022-02-11 00:43:19,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120747338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:19,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698483250] [2022-02-11 00:43:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:43:19,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:19,566 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) [2022-02-11 00:43:19,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-11 00:43:19,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:43:19,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:19,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:19,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:43:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:19,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:20,202 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:20,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:20,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:20,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:20,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:20,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:20,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698483250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:20,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:20,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:43:20,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40667914] [2022-02-11 00:43:20,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:20,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:43:20,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:43:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:43:20,299 INFO L87 Difference]: Start difference. First operand 1896 states and 4722 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:22,183 INFO L93 Difference]: Finished difference Result 4395 states and 10982 transitions. [2022-02-11 00:43:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:43:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:22,189 INFO L225 Difference]: With dead ends: 4395 [2022-02-11 00:43:22,189 INFO L226 Difference]: Without dead ends: 4362 [2022-02-11 00:43:22,190 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=656, Invalid=3766, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:43:22,190 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 498 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1907 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:22,190 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 214 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1907 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:43:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2022-02-11 00:43:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 1858. [2022-02-11 00:43:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 2.492191707054389) internal successors, (4628), 1857 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 4628 transitions. [2022-02-11 00:43:22,231 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 4628 transitions. Word has length 30 [2022-02-11 00:43:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:22,231 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 4628 transitions. [2022-02-11 00:43:22,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 4628 transitions. [2022-02-11 00:43:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:22,233 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:22,233 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:22,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-11 00:43:22,443 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,SelfDestructingSolverStorable113 [2022-02-11 00:43:22,443 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2002363052, now seen corresponding path program 10 times [2022-02-11 00:43:22,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:22,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810272919] [2022-02-11 00:43:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:22,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:22,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810272919] [2022-02-11 00:43:22,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810272919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:22,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556874558] [2022-02-11 00:43:22,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:43:22,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:22,733 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) [2022-02-11 00:43:22,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-11 00:43:22,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:43:22,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:22,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:22,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:23,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:43:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:23,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:23,360 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:23,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:23,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:23,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:23,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:23,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556874558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:23,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:23,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:43:23,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757272399] [2022-02-11 00:43:23,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:23,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:43:23,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:23,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:43:23,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:43:23,458 INFO L87 Difference]: Start difference. First operand 1858 states and 4628 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:25,644 INFO L93 Difference]: Finished difference Result 3812 states and 9447 transitions. [2022-02-11 00:43:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 00:43:25,645 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:25,650 INFO L225 Difference]: With dead ends: 3812 [2022-02-11 00:43:25,650 INFO L226 Difference]: Without dead ends: 3776 [2022-02-11 00:43:25,651 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:43:25,651 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 525 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:25,651 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 295 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:43:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2022-02-11 00:43:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 1852. [2022-02-11 00:43:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.4905456509994597) internal successors, (4610), 1851 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 4610 transitions. [2022-02-11 00:43:25,678 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 4610 transitions. Word has length 30 [2022-02-11 00:43:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:25,678 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 4610 transitions. [2022-02-11 00:43:25,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 4610 transitions. [2022-02-11 00:43:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:25,680 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:25,680 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:25,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:25,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:25,896 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash 979359220, now seen corresponding path program 11 times [2022-02-11 00:43:25,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:25,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613302517] [2022-02-11 00:43:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:25,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:26,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:26,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613302517] [2022-02-11 00:43:26,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613302517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:26,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600981175] [2022-02-11 00:43:26,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:43:26,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:26,202 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) [2022-02-11 00:43:26,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-11 00:43:26,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:43:26,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:26,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:26,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:43:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:26,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:26,900 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:26,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:26,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:26,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:26,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:27,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600981175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:27,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:27,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:43:27,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087129142] [2022-02-11 00:43:27,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:27,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:43:27,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:43:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:43:27,002 INFO L87 Difference]: Start difference. First operand 1852 states and 4610 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:28,381 INFO L93 Difference]: Finished difference Result 3543 states and 8809 transitions. [2022-02-11 00:43:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:43:28,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:28,387 INFO L225 Difference]: With dead ends: 3543 [2022-02-11 00:43:28,387 INFO L226 Difference]: Without dead ends: 3530 [2022-02-11 00:43:28,387 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=2377, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:43:28,387 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 427 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:28,387 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 255 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:43:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-02-11 00:43:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 1849. [2022-02-11 00:43:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 2.490800865800866) internal successors, (4603), 1848 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 4603 transitions. [2022-02-11 00:43:28,417 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 4603 transitions. Word has length 30 [2022-02-11 00:43:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:28,417 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 4603 transitions. [2022-02-11 00:43:28,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 4603 transitions. [2022-02-11 00:43:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:28,431 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:28,431 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:28,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:28,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:28,646 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1792281482, now seen corresponding path program 12 times [2022-02-11 00:43:28,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:28,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484379747] [2022-02-11 00:43:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:28,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:28,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:28,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484379747] [2022-02-11 00:43:28,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484379747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:28,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030893822] [2022-02-11 00:43:28,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:43:28,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:28,934 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) [2022-02-11 00:43:28,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-11 00:43:28,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:43:28,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:28,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:43:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:29,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:29,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-02-11 00:43:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:29,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:30,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:30,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:30,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:30,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:43:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:30,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030893822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:30,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:30,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2022-02-11 00:43:30,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625495963] [2022-02-11 00:43:30,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:30,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:43:30,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:43:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1019, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:43:30,118 INFO L87 Difference]: Start difference. First operand 1849 states and 4603 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:34,452 INFO L93 Difference]: Finished difference Result 3731 states and 9399 transitions. [2022-02-11 00:43:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 00:43:34,453 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:34,458 INFO L225 Difference]: With dead ends: 3731 [2022-02-11 00:43:34,458 INFO L226 Difference]: Without dead ends: 3722 [2022-02-11 00:43:34,458 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1228, Invalid=6254, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 00:43:34,458 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 424 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 4817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2959 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:34,459 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 166 Invalid, 4817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1639 Invalid, 0 Unknown, 2959 Unchecked, 0.7s Time] [2022-02-11 00:43:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2022-02-11 00:43:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2005. [2022-02-11 00:43:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 2.5099800399201597) internal successors, (5030), 2004 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 5030 transitions. [2022-02-11 00:43:34,485 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 5030 transitions. Word has length 30 [2022-02-11 00:43:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:34,486 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 5030 transitions. [2022-02-11 00:43:34,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 5030 transitions. [2022-02-11 00:43:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:34,488 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:34,488 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:34,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:34,703 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,SelfDestructingSolverStorable116 [2022-02-11 00:43:34,703 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash -746284764, now seen corresponding path program 13 times [2022-02-11 00:43:34,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:34,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442720731] [2022-02-11 00:43:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:34,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:35,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:35,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442720731] [2022-02-11 00:43:35,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442720731] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:35,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117139684] [2022-02-11 00:43:35,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:43:35,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:35,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:35,020 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) [2022-02-11 00:43:35,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-11 00:43:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:35,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:35,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:43:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:35,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:35,563 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:35,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:35,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:35,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:35,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117139684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:35,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:35,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:43:35,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882270126] [2022-02-11 00:43:35,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:35,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:43:35,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:35,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:43:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:43:35,647 INFO L87 Difference]: Start difference. First operand 2005 states and 5030 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:37,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:37,652 INFO L93 Difference]: Finished difference Result 4310 states and 10878 transitions. [2022-02-11 00:43:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:43:37,652 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:37,657 INFO L225 Difference]: With dead ends: 4310 [2022-02-11 00:43:37,658 INFO L226 Difference]: Without dead ends: 4278 [2022-02-11 00:43:37,658 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=548, Invalid=3484, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:43:37,658 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 424 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:37,658 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 255 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:43:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2022-02-11 00:43:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 2018. [2022-02-11 00:43:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.5101636093207733) internal successors, (5063), 2017 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5063 transitions. [2022-02-11 00:43:37,688 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5063 transitions. Word has length 30 [2022-02-11 00:43:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:37,688 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5063 transitions. [2022-02-11 00:43:37,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5063 transitions. [2022-02-11 00:43:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:37,690 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:37,690 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:37,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:37,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:37,891 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash 375380018, now seen corresponding path program 14 times [2022-02-11 00:43:37,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:37,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953810813] [2022-02-11 00:43:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:38,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:38,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953810813] [2022-02-11 00:43:38,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953810813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:38,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630676122] [2022-02-11 00:43:38,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:43:38,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:38,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:38,213 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) [2022-02-11 00:43:38,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-11 00:43:38,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:43:38,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:38,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:38,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:43:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:38,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:38,838 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:38,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:43:38,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:38,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:38,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:38,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:38,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630676122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:38,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:38,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:43:38,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835566821] [2022-02-11 00:43:38,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:38,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:43:38,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:43:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:43:38,929 INFO L87 Difference]: Start difference. First operand 2018 states and 5063 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:40,772 INFO L93 Difference]: Finished difference Result 3825 states and 9610 transitions. [2022-02-11 00:43:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:43:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:40,778 INFO L225 Difference]: With dead ends: 3825 [2022-02-11 00:43:40,778 INFO L226 Difference]: Without dead ends: 3805 [2022-02-11 00:43:40,778 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:43:40,778 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 437 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:40,778 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 243 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:43:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2022-02-11 00:43:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2008. [2022-02-11 00:43:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.509715994020927) internal successors, (5037), 2007 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5037 transitions. [2022-02-11 00:43:40,807 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5037 transitions. Word has length 30 [2022-02-11 00:43:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:40,807 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 5037 transitions. [2022-02-11 00:43:40,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5037 transitions. [2022-02-11 00:43:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:40,809 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:40,809 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:40,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:41,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:41,025 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:41,025 INFO L85 PathProgramCache]: Analyzing trace with hash 782669304, now seen corresponding path program 15 times [2022-02-11 00:43:41,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:41,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227385927] [2022-02-11 00:43:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:41,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:41,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:41,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227385927] [2022-02-11 00:43:41,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227385927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:41,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498773892] [2022-02-11 00:43:41,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:43:41,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:41,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:41,343 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) [2022-02-11 00:43:41,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-11 00:43:41,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:43:41,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:41,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:41,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:41,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:43:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:41,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:42,043 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:42,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:42,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:42,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:42,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:42,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498773892] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:42,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:42,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:43:42,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038790578] [2022-02-11 00:43:42,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:42,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:43:42,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:43:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:43:42,142 INFO L87 Difference]: Start difference. First operand 2008 states and 5037 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:44,193 INFO L93 Difference]: Finished difference Result 3728 states and 9330 transitions. [2022-02-11 00:43:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:43:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:44,198 INFO L225 Difference]: With dead ends: 3728 [2022-02-11 00:43:44,198 INFO L226 Difference]: Without dead ends: 3689 [2022-02-11 00:43:44,199 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:43:44,199 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 549 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:44,199 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 185 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:43:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2022-02-11 00:43:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 2008. [2022-02-11 00:43:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.5092177379172895) internal successors, (5036), 2007 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5036 transitions. [2022-02-11 00:43:44,225 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5036 transitions. Word has length 30 [2022-02-11 00:43:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:44,225 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 5036 transitions. [2022-02-11 00:43:44,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5036 transitions. [2022-02-11 00:43:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:44,227 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:44,227 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:44,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:44,443 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,SelfDestructingSolverStorable119 [2022-02-11 00:43:44,443 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 465824108, now seen corresponding path program 16 times [2022-02-11 00:43:44,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:44,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457651004] [2022-02-11 00:43:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:44,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:44,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457651004] [2022-02-11 00:43:44,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457651004] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136856393] [2022-02-11 00:43:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:43:44,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:44,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:44,756 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) [2022-02-11 00:43:44,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-11 00:43:44,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:43:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:44,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:45,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:43:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:45,394 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:45,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:43:45,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:45,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:45,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136856393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:45,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:45,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:43:45,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499687729] [2022-02-11 00:43:45,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:45,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:43:45,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:43:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:43:45,495 INFO L87 Difference]: Start difference. First operand 2008 states and 5036 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:47,937 INFO L93 Difference]: Finished difference Result 3795 states and 9547 transitions. [2022-02-11 00:43:47,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 00:43:47,937 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:47,942 INFO L225 Difference]: With dead ends: 3795 [2022-02-11 00:43:47,942 INFO L226 Difference]: Without dead ends: 3784 [2022-02-11 00:43:47,943 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=559, Invalid=4697, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 00:43:47,943 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 444 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:47,943 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 223 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:43:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2022-02-11 00:43:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 2017. [2022-02-11 00:43:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.5109126984126986) internal successors, (5062), 2016 states have internal predecessors, (5062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5062 transitions. [2022-02-11 00:43:47,983 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5062 transitions. Word has length 30 [2022-02-11 00:43:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:47,983 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 5062 transitions. [2022-02-11 00:43:47,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5062 transitions. [2022-02-11 00:43:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:47,985 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:47,985 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:48,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:48,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:48,198 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2072742138, now seen corresponding path program 17 times [2022-02-11 00:43:48,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:48,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67039486] [2022-02-11 00:43:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:48,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:48,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67039486] [2022-02-11 00:43:48,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67039486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:48,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671800958] [2022-02-11 00:43:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:43:48,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:48,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:48,452 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) [2022-02-11 00:43:48,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-11 00:43:48,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:43:48,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:48,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:48,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:43:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:48,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:48,864 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:48,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:43:48,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:48,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:48,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671800958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:48,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:48,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:43:48,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175166031] [2022-02-11 00:43:48,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:48,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:43:48,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:43:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:43:48,936 INFO L87 Difference]: Start difference. First operand 2017 states and 5062 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:50,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:50,938 INFO L93 Difference]: Finished difference Result 4392 states and 11081 transitions. [2022-02-11 00:43:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:43:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:50,946 INFO L225 Difference]: With dead ends: 4392 [2022-02-11 00:43:50,946 INFO L226 Difference]: Without dead ends: 4359 [2022-02-11 00:43:50,947 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=692, Invalid=5314, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:43:50,947 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 471 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:50,947 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 241 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:43:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2022-02-11 00:43:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 2011. [2022-02-11 00:43:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.508955223880597) internal successors, (5043), 2010 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5043 transitions. [2022-02-11 00:43:50,982 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5043 transitions. Word has length 30 [2022-02-11 00:43:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:50,982 INFO L470 AbstractCegarLoop]: Abstraction has 2011 states and 5043 transitions. [2022-02-11 00:43:50,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5043 transitions. [2022-02-11 00:43:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:50,984 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:50,984 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:51,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-11 00:43:51,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:51,202 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1958766222, now seen corresponding path program 18 times [2022-02-11 00:43:51,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:51,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373052407] [2022-02-11 00:43:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:51,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:51,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:51,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373052407] [2022-02-11 00:43:51,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373052407] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:51,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824583236] [2022-02-11 00:43:51,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:43:51,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:51,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:51,482 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) [2022-02-11 00:43:51,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-11 00:43:51,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:43:51,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:43:51,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:43:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:51,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:51,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-02-11 00:43:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:52,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:52,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:52,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:52,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:43:52,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:43:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:52,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824583236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:52,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:52,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:43:52,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577955990] [2022-02-11 00:43:52,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:52,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:43:52,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:52,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:43:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:43:52,575 INFO L87 Difference]: Start difference. First operand 2011 states and 5043 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:43:58,246 INFO L93 Difference]: Finished difference Result 4961 states and 12462 transitions. [2022-02-11 00:43:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-11 00:43:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:43:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:43:58,253 INFO L225 Difference]: With dead ends: 4961 [2022-02-11 00:43:58,253 INFO L226 Difference]: Without dead ends: 4950 [2022-02-11 00:43:58,254 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7494 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1998, Invalid=20652, Unknown=0, NotChecked=0, Total=22650 [2022-02-11 00:43:58,254 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 707 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 3920 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 4459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 3920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:43:58,254 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 288 Invalid, 4459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 3920 Invalid, 0 Unknown, 76 Unchecked, 1.6s Time] [2022-02-11 00:43:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-02-11 00:43:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 2018. [2022-02-11 00:43:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.508676251859197) internal successors, (5060), 2017 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5060 transitions. [2022-02-11 00:43:58,285 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5060 transitions. Word has length 30 [2022-02-11 00:43:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:43:58,285 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5060 transitions. [2022-02-11 00:43:58,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:43:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5060 transitions. [2022-02-11 00:43:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:43:58,287 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:43:58,288 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:43:58,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-11 00:43:58,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-11 00:43:58,499 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:43:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:43:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash -575675730, now seen corresponding path program 19 times [2022-02-11 00:43:58,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:43:58,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736873205] [2022-02-11 00:43:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:43:58,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:43:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:58,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:43:58,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736873205] [2022-02-11 00:43:58,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736873205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:43:58,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924100512] [2022-02-11 00:43:58,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:43:58,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:43:58,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:43:58,790 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) [2022-02-11 00:43:58,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-11 00:43:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:43:58,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:43:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:43:59,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:43:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:59,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:43:59,465 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:43:59,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:43:59,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:59,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:43:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:43:59,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:43:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:43:59,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924100512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:43:59,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:43:59,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:43:59,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225227923] [2022-02-11 00:43:59,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:43:59,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:43:59,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:43:59,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:43:59,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:43:59,565 INFO L87 Difference]: Start difference. First operand 2018 states and 5060 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:01,790 INFO L93 Difference]: Finished difference Result 3781 states and 9549 transitions. [2022-02-11 00:44:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:44:01,791 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:01,796 INFO L225 Difference]: With dead ends: 3781 [2022-02-11 00:44:01,796 INFO L226 Difference]: Without dead ends: 3772 [2022-02-11 00:44:01,796 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=3636, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:44:01,796 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 334 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 2739 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:01,796 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 288 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2739 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:44:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2022-02-11 00:44:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 2034. [2022-02-11 00:44:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.5086079685194296) internal successors, (5100), 2033 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5100 transitions. [2022-02-11 00:44:01,827 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5100 transitions. Word has length 30 [2022-02-11 00:44:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:01,827 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 5100 transitions. [2022-02-11 00:44:01,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5100 transitions. [2022-02-11 00:44:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:01,829 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:01,829 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:01,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:02,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:02,043 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1042393320, now seen corresponding path program 20 times [2022-02-11 00:44:02,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:02,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099180601] [2022-02-11 00:44:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:02,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:02,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099180601] [2022-02-11 00:44:02,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099180601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:02,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344699995] [2022-02-11 00:44:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:02,317 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) [2022-02-11 00:44:02,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-11 00:44:02,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:02,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:02,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:44:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:02,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:02,957 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:02,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:44:03,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:03,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:03,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:03,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:03,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344699995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:03,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:03,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:44:03,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138221106] [2022-02-11 00:44:03,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:03,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:44:03,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:44:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:44:03,061 INFO L87 Difference]: Start difference. First operand 2034 states and 5100 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:05,198 INFO L93 Difference]: Finished difference Result 4013 states and 10183 transitions. [2022-02-11 00:44:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:44:05,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:05,204 INFO L225 Difference]: With dead ends: 4013 [2022-02-11 00:44:05,205 INFO L226 Difference]: Without dead ends: 4002 [2022-02-11 00:44:05,205 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=627, Invalid=5225, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:44:05,206 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 424 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:05,206 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 252 Invalid, 2603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:44:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2022-02-11 00:44:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 2043. [2022-02-11 00:44:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 2.5102840352595495) internal successors, (5126), 2042 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 5126 transitions. [2022-02-11 00:44:05,245 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 5126 transitions. Word has length 30 [2022-02-11 00:44:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:05,246 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 5126 transitions. [2022-02-11 00:44:05,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 5126 transitions. [2022-02-11 00:44:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:05,248 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:05,248 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:05,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:05,464 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,SelfDestructingSolverStorable124 [2022-02-11 00:44:05,465 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1707596488, now seen corresponding path program 21 times [2022-02-11 00:44:05,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:05,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147139075] [2022-02-11 00:44:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:05,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:05,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147139075] [2022-02-11 00:44:05,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147139075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:05,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144507084] [2022-02-11 00:44:05,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:05,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:05,652 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) [2022-02-11 00:44:05,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-11 00:44:05,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:44:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:05,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:06,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:44:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:06,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:06,323 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:06,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:44:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:06,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:06,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:06,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144507084] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:06,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:06,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:44:06,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775582450] [2022-02-11 00:44:06,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:06,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:44:06,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:44:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:44:06,424 INFO L87 Difference]: Start difference. First operand 2043 states and 5126 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:08,452 INFO L93 Difference]: Finished difference Result 4359 states and 11056 transitions. [2022-02-11 00:44:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:44:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:08,459 INFO L225 Difference]: With dead ends: 4359 [2022-02-11 00:44:08,459 INFO L226 Difference]: Without dead ends: 4326 [2022-02-11 00:44:08,460 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=697, Invalid=5623, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:44:08,460 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 503 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:08,460 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 272 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:44:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-02-11 00:44:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 2034. [2022-02-11 00:44:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.5086079685194296) internal successors, (5100), 2033 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5100 transitions. [2022-02-11 00:44:08,492 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5100 transitions. Word has length 30 [2022-02-11 00:44:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:08,493 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 5100 transitions. [2022-02-11 00:44:08,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5100 transitions. [2022-02-11 00:44:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:08,495 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:08,495 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:08,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:08,710 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,SelfDestructingSolverStorable125 [2022-02-11 00:44:08,710 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:08,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1589117498, now seen corresponding path program 22 times [2022-02-11 00:44:08,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:08,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047699144] [2022-02-11 00:44:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:08,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:08,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:08,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047699144] [2022-02-11 00:44:08,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047699144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:08,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931288661] [2022-02-11 00:44:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:08,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:08,956 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) [2022-02-11 00:44:08,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-11 00:44:08,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:08,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:08,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:09,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:44:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:09,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:09,601 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:09,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:44:09,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:09,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:09,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:09,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931288661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:09,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:09,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:44:09,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168274673] [2022-02-11 00:44:09,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:09,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:44:09,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:09,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:44:09,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:44:09,674 INFO L87 Difference]: Start difference. First operand 2034 states and 5100 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:11,919 INFO L93 Difference]: Finished difference Result 3749 states and 9472 transitions. [2022-02-11 00:44:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:44:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:11,925 INFO L225 Difference]: With dead ends: 3749 [2022-02-11 00:44:11,925 INFO L226 Difference]: Without dead ends: 3740 [2022-02-11 00:44:11,925 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=418, Invalid=3742, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:44:11,925 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 367 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:11,926 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 254 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:44:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2022-02-11 00:44:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 2033. [2022-02-11 00:44:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.5088582677165356) internal successors, (5098), 2032 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 5098 transitions. [2022-02-11 00:44:11,955 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 5098 transitions. Word has length 30 [2022-02-11 00:44:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:11,955 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 5098 transitions. [2022-02-11 00:44:11,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 5098 transitions. [2022-02-11 00:44:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:11,958 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:11,958 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:11,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:12,171 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,SelfDestructingSolverStorable126 [2022-02-11 00:44:12,171 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash 196043354, now seen corresponding path program 23 times [2022-02-11 00:44:12,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:12,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198586023] [2022-02-11 00:44:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:12,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:12,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198586023] [2022-02-11 00:44:12,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198586023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:12,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967386870] [2022-02-11 00:44:12,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:12,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:12,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:12,376 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) [2022-02-11 00:44:12,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-11 00:44:12,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:44:12,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:12,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:12,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:44:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:12,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:12,828 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:12,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:44:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:12,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:12,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:12,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967386870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:12,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:12,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:44:12,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864602103] [2022-02-11 00:44:12,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:12,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:44:12,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:44:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:44:12,892 INFO L87 Difference]: Start difference. First operand 2033 states and 5098 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:14,516 INFO L93 Difference]: Finished difference Result 3963 states and 9981 transitions. [2022-02-11 00:44:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:44:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:14,522 INFO L225 Difference]: With dead ends: 3963 [2022-02-11 00:44:14,522 INFO L226 Difference]: Without dead ends: 3952 [2022-02-11 00:44:14,522 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=597, Invalid=4373, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:44:14,523 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 537 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:14,523 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 161 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:44:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-02-11 00:44:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 2089. [2022-02-11 00:44:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.5134099616858236) internal successors, (5248), 2088 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5248 transitions. [2022-02-11 00:44:14,550 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5248 transitions. Word has length 30 [2022-02-11 00:44:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:14,550 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 5248 transitions. [2022-02-11 00:44:14,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5248 transitions. [2022-02-11 00:44:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:14,552 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:14,552 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:14,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:14,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:14,767 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1952444404, now seen corresponding path program 24 times [2022-02-11 00:44:14,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:14,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743463620] [2022-02-11 00:44:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:14,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:14,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743463620] [2022-02-11 00:44:14,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743463620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:14,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57718728] [2022-02-11 00:44:14,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:14,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:14,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:14,984 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) [2022-02-11 00:44:14,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-11 00:44:15,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:44:15,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:15,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:44:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:15,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:44:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:15,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:15,398 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:15,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:44:15,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:15,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:15,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:15,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57718728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:15,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:15,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:44:15,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004729175] [2022-02-11 00:44:15,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:15,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:44:15,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:44:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:44:15,458 INFO L87 Difference]: Start difference. First operand 2089 states and 5248 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:17,576 INFO L93 Difference]: Finished difference Result 4543 states and 11484 transitions. [2022-02-11 00:44:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-11 00:44:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:17,582 INFO L225 Difference]: With dead ends: 4543 [2022-02-11 00:44:17,582 INFO L226 Difference]: Without dead ends: 4499 [2022-02-11 00:44:17,582 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=931, Invalid=6725, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 00:44:17,582 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 532 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:17,582 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 219 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:44:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4499 states. [2022-02-11 00:44:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4499 to 2083. [2022-02-11 00:44:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.510086455331412) internal successors, (5226), 2082 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5226 transitions. [2022-02-11 00:44:17,613 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5226 transitions. Word has length 30 [2022-02-11 00:44:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:17,613 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 5226 transitions. [2022-02-11 00:44:17,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5226 transitions. [2022-02-11 00:44:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:17,615 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:17,615 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:17,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-11 00:44:17,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:17,831 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:17,831 INFO L85 PathProgramCache]: Analyzing trace with hash -813568824, now seen corresponding path program 25 times [2022-02-11 00:44:17,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:17,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767329558] [2022-02-11 00:44:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:18,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:18,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767329558] [2022-02-11 00:44:18,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767329558] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:18,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844781345] [2022-02-11 00:44:18,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:18,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:18,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:18,064 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) [2022-02-11 00:44:18,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-11 00:44:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:18,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:18,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:18,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:44:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:18,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:18,520 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:18,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:44:18,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:18,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:18,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:18,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844781345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:18,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:18,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:44:18,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678650251] [2022-02-11 00:44:18,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:18,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:44:18,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:18,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:44:18,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:44:18,589 INFO L87 Difference]: Start difference. First operand 2083 states and 5226 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:20,608 INFO L93 Difference]: Finished difference Result 4059 states and 10141 transitions. [2022-02-11 00:44:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:44:20,608 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:20,613 INFO L225 Difference]: With dead ends: 4059 [2022-02-11 00:44:20,613 INFO L226 Difference]: Without dead ends: 4004 [2022-02-11 00:44:20,613 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=5235, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:44:20,613 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 594 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:20,614 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 233 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2747 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:44:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2022-02-11 00:44:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 2083. [2022-02-11 00:44:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 2.509606147934678) internal successors, (5225), 2082 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5225 transitions. [2022-02-11 00:44:20,640 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5225 transitions. Word has length 30 [2022-02-11 00:44:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:20,640 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 5225 transitions. [2022-02-11 00:44:20,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5225 transitions. [2022-02-11 00:44:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:20,642 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:20,642 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:20,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-02-11 00:44:20,861 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,SelfDestructingSolverStorable129 [2022-02-11 00:44:20,861 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:20,862 INFO L85 PathProgramCache]: Analyzing trace with hash 260676860, now seen corresponding path program 26 times [2022-02-11 00:44:20,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:20,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423174935] [2022-02-11 00:44:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:20,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:21,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:21,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423174935] [2022-02-11 00:44:21,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423174935] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:21,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006665319] [2022-02-11 00:44:21,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:21,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:21,183 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) [2022-02-11 00:44:21,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-11 00:44:21,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:21,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:21,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:44:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:21,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:21,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-11 00:44:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:21,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:22,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:22,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:22,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:44:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:22,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006665319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:22,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:22,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2022-02-11 00:44:22,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382488191] [2022-02-11 00:44:22,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:22,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:44:22,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:22,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:44:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:44:22,133 INFO L87 Difference]: Start difference. First operand 2083 states and 5225 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:24,612 INFO L93 Difference]: Finished difference Result 3770 states and 9481 transitions. [2022-02-11 00:44:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-11 00:44:24,612 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:24,618 INFO L225 Difference]: With dead ends: 3770 [2022-02-11 00:44:24,618 INFO L226 Difference]: Without dead ends: 3761 [2022-02-11 00:44:24,619 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1041, Invalid=5931, Unknown=0, NotChecked=0, Total=6972 [2022-02-11 00:44:24,619 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 459 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1629 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:24,619 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 156 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1822 Invalid, 0 Unknown, 1629 Unchecked, 0.7s Time] [2022-02-11 00:44:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2022-02-11 00:44:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2162. [2022-02-11 00:44:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 2.5145765849143915) internal successors, (5434), 2161 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 5434 transitions. [2022-02-11 00:44:24,648 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 5434 transitions. Word has length 30 [2022-02-11 00:44:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:24,648 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 5434 transitions. [2022-02-11 00:44:24,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 5434 transitions. [2022-02-11 00:44:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:24,650 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:24,650 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:24,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:24,851 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,SelfDestructingSolverStorable130 [2022-02-11 00:44:24,851 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2017077910, now seen corresponding path program 27 times [2022-02-11 00:44:24,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:24,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103488607] [2022-02-11 00:44:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:25,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:25,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103488607] [2022-02-11 00:44:25,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103488607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:25,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726978048] [2022-02-11 00:44:25,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:25,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:25,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:25,173 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) [2022-02-11 00:44:25,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-11 00:44:25,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:25,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:25,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:44:25,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:25,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:25,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-02-11 00:44:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:25,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:26,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:26,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:44:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:26,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726978048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:26,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:26,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-02-11 00:44:26,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731503600] [2022-02-11 00:44:26,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:26,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-11 00:44:26,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-11 00:44:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:44:26,325 INFO L87 Difference]: Start difference. First operand 2162 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:29,089 INFO L93 Difference]: Finished difference Result 4548 states and 11481 transitions. [2022-02-11 00:44:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:44:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:29,095 INFO L225 Difference]: With dead ends: 4548 [2022-02-11 00:44:29,095 INFO L226 Difference]: Without dead ends: 4537 [2022-02-11 00:44:29,096 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1224, Invalid=6432, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 00:44:29,096 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 592 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:29,096 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 185 Invalid, 2665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1846 Invalid, 0 Unknown, 480 Unchecked, 0.8s Time] [2022-02-11 00:44:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2022-02-11 00:44:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 2172. [2022-02-11 00:44:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 2.5149700598802394) internal successors, (5460), 2171 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 5460 transitions. [2022-02-11 00:44:29,130 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 5460 transitions. Word has length 30 [2022-02-11 00:44:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:29,130 INFO L470 AbstractCegarLoop]: Abstraction has 2172 states and 5460 transitions. [2022-02-11 00:44:29,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8461538461538463) internal successors, (72), 38 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 5460 transitions. [2022-02-11 00:44:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:29,132 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:29,132 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:29,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:29,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:29,347 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1099127720, now seen corresponding path program 28 times [2022-02-11 00:44:29,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:29,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511068237] [2022-02-11 00:44:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:29,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:29,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511068237] [2022-02-11 00:44:29,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511068237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:29,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706363787] [2022-02-11 00:44:29,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:44:29,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:29,565 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) [2022-02-11 00:44:29,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-11 00:44:29,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:44:29,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:29,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:29,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:44:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:29,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:30,019 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:30,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:44:30,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:30,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:30,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:30,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:30,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706363787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:30,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:30,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:44:30,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389078421] [2022-02-11 00:44:30,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:30,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:44:30,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:30,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:44:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:44:30,077 INFO L87 Difference]: Start difference. First operand 2172 states and 5460 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:33,224 INFO L93 Difference]: Finished difference Result 4843 states and 12194 transitions. [2022-02-11 00:44:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-11 00:44:33,224 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:33,231 INFO L225 Difference]: With dead ends: 4843 [2022-02-11 00:44:33,231 INFO L226 Difference]: Without dead ends: 4813 [2022-02-11 00:44:33,232 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1353, Invalid=10637, Unknown=0, NotChecked=0, Total=11990 [2022-02-11 00:44:33,233 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 572 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:33,233 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 205 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:44:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2022-02-11 00:44:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 2167. [2022-02-11 00:44:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5138504155124655) internal successors, (5445), 2166 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5445 transitions. [2022-02-11 00:44:33,294 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5445 transitions. Word has length 30 [2022-02-11 00:44:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:33,295 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 5445 transitions. [2022-02-11 00:44:33,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5445 transitions. [2022-02-11 00:44:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:33,297 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:33,297 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:33,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:33,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:33,513 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1156224604, now seen corresponding path program 29 times [2022-02-11 00:44:33,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:33,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025147796] [2022-02-11 00:44:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:33,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:33,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025147796] [2022-02-11 00:44:33,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025147796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:33,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554357862] [2022-02-11 00:44:33,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:44:33,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:33,755 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) [2022-02-11 00:44:33,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-11 00:44:33,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:44:33,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:33,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:34,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:44:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:34,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:34,258 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:34,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:44:34,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:34,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:34,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:34,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554357862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:34,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:34,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:44:34,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296481333] [2022-02-11 00:44:34,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:34,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:44:34,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:34,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:44:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:44:34,347 INFO L87 Difference]: Start difference. First operand 2167 states and 5445 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:36,916 INFO L93 Difference]: Finished difference Result 3994 states and 10078 transitions. [2022-02-11 00:44:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 00:44:36,917 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:36,923 INFO L225 Difference]: With dead ends: 3994 [2022-02-11 00:44:36,923 INFO L226 Difference]: Without dead ends: 3975 [2022-02-11 00:44:36,924 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=684, Invalid=5636, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:44:36,924 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 456 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:36,924 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 197 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2708 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:44:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2022-02-11 00:44:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 2147. [2022-02-11 00:44:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.5158434296365333) internal successors, (5399), 2146 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 5399 transitions. [2022-02-11 00:44:36,960 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 5399 transitions. Word has length 30 [2022-02-11 00:44:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:36,960 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 5399 transitions. [2022-02-11 00:44:36,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 5399 transitions. [2022-02-11 00:44:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:36,963 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:36,963 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:36,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-02-11 00:44:37,178 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,SelfDestructingSolverStorable133 [2022-02-11 00:44:37,178 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:37,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:37,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2131053826, now seen corresponding path program 30 times [2022-02-11 00:44:37,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:37,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067014507] [2022-02-11 00:44:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:37,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:37,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:37,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067014507] [2022-02-11 00:44:37,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067014507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:37,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370345344] [2022-02-11 00:44:37,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:44:37,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:37,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:37,403 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) [2022-02-11 00:44:37,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-11 00:44:37,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:44:37,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:37,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:44:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:37,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:37,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-02-11 00:44:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:37,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:38,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:38,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:38,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:38,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:44:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:38,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370345344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:38,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:38,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:44:38,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595792746] [2022-02-11 00:44:38,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:38,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:44:38,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:38,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:44:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:44:38,159 INFO L87 Difference]: Start difference. First operand 2147 states and 5399 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:46,189 INFO L93 Difference]: Finished difference Result 5108 states and 12746 transitions. [2022-02-11 00:44:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-02-11 00:44:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:46,196 INFO L225 Difference]: With dead ends: 5108 [2022-02-11 00:44:46,196 INFO L226 Difference]: Without dead ends: 5097 [2022-02-11 00:44:46,198 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13100 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2824, Invalid=32708, Unknown=0, NotChecked=0, Total=35532 [2022-02-11 00:44:46,198 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 895 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 4257 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 5170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 4257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:46,198 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 306 Invalid, 5170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 4257 Invalid, 0 Unknown, 307 Unchecked, 1.9s Time] [2022-02-11 00:44:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2022-02-11 00:44:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 2298. [2022-02-11 00:44:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.518502394427514) internal successors, (5785), 2297 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) [2022-02-11 00:44:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5785 transitions. [2022-02-11 00:44:46,238 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5785 transitions. Word has length 30 [2022-02-11 00:44:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:46,238 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 5785 transitions. [2022-02-11 00:44:46,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5785 transitions. [2022-02-11 00:44:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:46,241 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:46,241 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:46,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:46,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-11 00:44:46,463 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash 400382510, now seen corresponding path program 31 times [2022-02-11 00:44:46,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:46,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224457996] [2022-02-11 00:44:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:46,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:46,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224457996] [2022-02-11 00:44:46,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224457996] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:46,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899519070] [2022-02-11 00:44:46,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:44:46,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:46,745 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) [2022-02-11 00:44:46,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-11 00:44:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:46,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:44:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:47,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:44:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:47,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:47,260 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:44:47,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:44:47,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:47,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:44:47,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:44:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:47,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899519070] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:47,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:47,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:44:47,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387106944] [2022-02-11 00:44:47,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:47,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:44:47,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:47,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:44:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:44:47,327 INFO L87 Difference]: Start difference. First operand 2298 states and 5785 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:49,144 INFO L93 Difference]: Finished difference Result 4484 states and 11349 transitions. [2022-02-11 00:44:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:44:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:49,150 INFO L225 Difference]: With dead ends: 4484 [2022-02-11 00:44:49,150 INFO L226 Difference]: Without dead ends: 4463 [2022-02-11 00:44:49,151 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=495, Invalid=3795, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:44:49,151 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 382 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2098 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:49,151 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 184 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2098 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:44:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2022-02-11 00:44:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 2332. [2022-02-11 00:44:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.520806520806521) internal successors, (5876), 2331 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 5876 transitions. [2022-02-11 00:44:49,184 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 5876 transitions. Word has length 30 [2022-02-11 00:44:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:49,184 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 5876 transitions. [2022-02-11 00:44:49,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 5876 transitions. [2022-02-11 00:44:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:49,186 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:49,187 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:49,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-11 00:44:49,402 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,SelfDestructingSolverStorable135 [2022-02-11 00:44:49,402 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash -727801376, now seen corresponding path program 32 times [2022-02-11 00:44:49,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:49,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340600846] [2022-02-11 00:44:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:49,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:49,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:49,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340600846] [2022-02-11 00:44:49,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340600846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:49,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207279179] [2022-02-11 00:44:49,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:44:49,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:49,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:49,718 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) [2022-02-11 00:44:49,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-11 00:44:49,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:44:49,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:49,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:44:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:50,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:50,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 37 [2022-02-11 00:44:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:50,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:50,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:50,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:50,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:44:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:50,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207279179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:50,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:50,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 37 [2022-02-11 00:44:50,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242276240] [2022-02-11 00:44:50,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:50,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:44:50,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:44:50,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:44:50,617 INFO L87 Difference]: Start difference. First operand 2332 states and 5876 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:44:52,717 INFO L93 Difference]: Finished difference Result 3763 states and 9467 transitions. [2022-02-11 00:44:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 00:44:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:44:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:44:52,722 INFO L225 Difference]: With dead ends: 3763 [2022-02-11 00:44:52,722 INFO L226 Difference]: Without dead ends: 3750 [2022-02-11 00:44:52,722 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=953, Invalid=4017, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:44:52,723 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 321 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1561 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:44:52,723 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 215 Invalid, 2666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 959 Invalid, 0 Unknown, 1561 Unchecked, 0.3s Time] [2022-02-11 00:44:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-02-11 00:44:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 2430. [2022-02-11 00:44:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2429 states have (on average 2.527377521613833) internal successors, (6139), 2429 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 6139 transitions. [2022-02-11 00:44:52,750 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 6139 transitions. Word has length 30 [2022-02-11 00:44:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:44:52,750 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 6139 transitions. [2022-02-11 00:44:52,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:44:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 6139 transitions. [2022-02-11 00:44:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:44:52,752 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:44:52,752 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:44:52,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-02-11 00:44:52,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-11 00:44:52,968 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:44:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:44:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash 85120886, now seen corresponding path program 33 times [2022-02-11 00:44:52,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:44:52,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138384317] [2022-02-11 00:44:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:44:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:44:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:44:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:53,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:44:53,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138384317] [2022-02-11 00:44:53,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138384317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:44:53,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993800144] [2022-02-11 00:44:53,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:44:53,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:44:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:44:53,275 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) [2022-02-11 00:44:53,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-11 00:44:53,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:44:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:44:53,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 00:44:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:44:53,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:53,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-11 00:44:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:53,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:44:54,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:54,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:44:54,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:44:54,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:44:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:44:54,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993800144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:44:54,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:44:54,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-02-11 00:44:54,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997565437] [2022-02-11 00:44:54,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:44:54,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:44:54,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:44:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:44:54,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:44:54,437 INFO L87 Difference]: Start difference. First operand 2430 states and 6139 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:00,327 INFO L93 Difference]: Finished difference Result 5067 states and 12840 transitions. [2022-02-11 00:45:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-11 00:45:00,328 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:00,334 INFO L225 Difference]: With dead ends: 5067 [2022-02-11 00:45:00,334 INFO L226 Difference]: Without dead ends: 5052 [2022-02-11 00:45:00,335 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5667 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2161, Invalid=12119, Unknown=0, NotChecked=0, Total=14280 [2022-02-11 00:45:00,335 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 651 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3417 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:00,335 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 126 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1382 Invalid, 0 Unknown, 3417 Unchecked, 0.7s Time] [2022-02-11 00:45:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2022-02-11 00:45:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 2529. [2022-02-11 00:45:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.53125) internal successors, (6399), 2528 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 6399 transitions. [2022-02-11 00:45:00,371 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 6399 transitions. Word has length 30 [2022-02-11 00:45:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:00,371 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 6399 transitions. [2022-02-11 00:45:00,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 6399 transitions. [2022-02-11 00:45:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:00,373 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:00,373 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:00,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:00,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:00,589 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1331780578, now seen corresponding path program 34 times [2022-02-11 00:45:00,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:00,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135612838] [2022-02-11 00:45:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:00,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:00,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:00,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135612838] [2022-02-11 00:45:00,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135612838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:00,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433010868] [2022-02-11 00:45:00,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:00,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:00,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:00,906 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) [2022-02-11 00:45:00,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-11 00:45:00,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:00,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:00,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:01,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:45:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:01,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:01,563 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:01,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:01,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:01,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:01,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433010868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:01,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:01,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:45:01,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234642404] [2022-02-11 00:45:01,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:01,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:45:01,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:45:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:45:01,655 INFO L87 Difference]: Start difference. First operand 2529 states and 6399 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:04,086 INFO L93 Difference]: Finished difference Result 4506 states and 11402 transitions. [2022-02-11 00:45:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 00:45:04,086 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:04,092 INFO L225 Difference]: With dead ends: 4506 [2022-02-11 00:45:04,092 INFO L226 Difference]: Without dead ends: 4489 [2022-02-11 00:45:04,093 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=642, Invalid=4908, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:45:04,093 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 400 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2603 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:04,093 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 184 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2603 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:45:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4489 states. [2022-02-11 00:45:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4489 to 2497. [2022-02-11 00:45:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 2.5292467948717947) internal successors, (6313), 2496 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 6313 transitions. [2022-02-11 00:45:04,125 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 6313 transitions. Word has length 30 [2022-02-11 00:45:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:04,127 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 6313 transitions. [2022-02-11 00:45:04,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 6313 transitions. [2022-02-11 00:45:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:04,129 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:04,129 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:04,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:04,335 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,SelfDestructingSolverStorable138 [2022-02-11 00:45:04,335 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1241336488, now seen corresponding path program 35 times [2022-02-11 00:45:04,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:04,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746852428] [2022-02-11 00:45:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:04,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:04,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:04,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746852428] [2022-02-11 00:45:04,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746852428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:04,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742052425] [2022-02-11 00:45:04,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:04,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:04,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:04,686 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) [2022-02-11 00:45:04,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-11 00:45:04,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:04,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:04,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:05,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:45:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:05,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:05,287 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:05,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:05,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:05,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:05,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:05,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:05,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742052425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:05,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:05,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:45:05,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735476957] [2022-02-11 00:45:05,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:05,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:45:05,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:45:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:45:05,356 INFO L87 Difference]: Start difference. First operand 2497 states and 6313 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:07,601 INFO L93 Difference]: Finished difference Result 4364 states and 11046 transitions. [2022-02-11 00:45:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 00:45:07,601 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:07,607 INFO L225 Difference]: With dead ends: 4364 [2022-02-11 00:45:07,607 INFO L226 Difference]: Without dead ends: 4353 [2022-02-11 00:45:07,608 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=758, Invalid=6552, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:45:07,608 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 424 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 2593 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:07,608 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 194 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2593 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:45:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2022-02-11 00:45:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 2500. [2022-02-11 00:45:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 2.5290116046418567) internal successors, (6320), 2499 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 6320 transitions. [2022-02-11 00:45:07,641 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 6320 transitions. Word has length 30 [2022-02-11 00:45:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:07,641 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 6320 transitions. [2022-02-11 00:45:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 6320 transitions. [2022-02-11 00:45:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:07,643 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:07,643 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:07,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:07,859 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,SelfDestructingSolverStorable139 [2022-02-11 00:45:07,859 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 515064562, now seen corresponding path program 36 times [2022-02-11 00:45:07,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:07,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953296515] [2022-02-11 00:45:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:08,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:08,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953296515] [2022-02-11 00:45:08,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953296515] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:08,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888538477] [2022-02-11 00:45:08,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:08,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:08,130 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) [2022-02-11 00:45:08,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:08,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-11 00:45:08,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:08,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:45:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:08,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:08,693 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:08,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:45:08,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:08,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:08,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:08,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:08,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888538477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:08,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:08,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:45:08,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348588420] [2022-02-11 00:45:08,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:08,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:45:08,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:45:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:45:08,771 INFO L87 Difference]: Start difference. First operand 2500 states and 6320 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:11,743 INFO L93 Difference]: Finished difference Result 4965 states and 12577 transitions. [2022-02-11 00:45:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 00:45:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:11,751 INFO L225 Difference]: With dead ends: 4965 [2022-02-11 00:45:11,751 INFO L226 Difference]: Without dead ends: 4932 [2022-02-11 00:45:11,751 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=931, Invalid=7625, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 00:45:11,751 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 484 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:11,752 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 217 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:45:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2022-02-11 00:45:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 2497. [2022-02-11 00:45:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 2.5292467948717947) internal successors, (6313), 2496 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 6313 transitions. [2022-02-11 00:45:11,793 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 6313 transitions. Word has length 30 [2022-02-11 00:45:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:11,793 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 6313 transitions. [2022-02-11 00:45:11,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 6313 transitions. [2022-02-11 00:45:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:11,795 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:11,795 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:11,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:12,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:12,011 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 629040478, now seen corresponding path program 37 times [2022-02-11 00:45:12,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:12,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486452710] [2022-02-11 00:45:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:12,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:12,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486452710] [2022-02-11 00:45:12,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486452710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:12,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790976425] [2022-02-11 00:45:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:12,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:12,276 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) [2022-02-11 00:45:12,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-11 00:45:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:12,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:12,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:12,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:45:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:12,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:12,925 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:12,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:12,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:12,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:12,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:13,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790976425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:13,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:13,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:45:13,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857776300] [2022-02-11 00:45:13,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:13,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:45:13,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:45:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:45:13,027 INFO L87 Difference]: Start difference. First operand 2497 states and 6313 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:15,405 INFO L93 Difference]: Finished difference Result 4233 states and 10728 transitions. [2022-02-11 00:45:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:45:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:15,411 INFO L225 Difference]: With dead ends: 4233 [2022-02-11 00:45:15,411 INFO L226 Difference]: Without dead ends: 4224 [2022-02-11 00:45:15,411 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=441, Invalid=4115, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:45:15,411 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 326 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:15,411 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 258 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:45:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2022-02-11 00:45:15,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 2479. [2022-02-11 00:45:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 2.5294592413236483) internal successors, (6268), 2478 states have internal predecessors, (6268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 6268 transitions. [2022-02-11 00:45:15,444 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 6268 transitions. Word has length 30 [2022-02-11 00:45:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:15,444 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 6268 transitions. [2022-02-11 00:45:15,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 6268 transitions. [2022-02-11 00:45:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:15,447 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:15,447 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:15,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:15,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:15,663 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1247885158, now seen corresponding path program 26 times [2022-02-11 00:45:15,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:15,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877869532] [2022-02-11 00:45:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:15,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:15,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877869532] [2022-02-11 00:45:15,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877869532] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:15,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180825064] [2022-02-11 00:45:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:15,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:15,980 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) [2022-02-11 00:45:15,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-11 00:45:16,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:16,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:16,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:16,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:16,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:45:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:16,537 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:16,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:16,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:16,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:16,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180825064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:16,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:16,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:45:16,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60293906] [2022-02-11 00:45:16,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:16,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:45:16,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:45:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:45:16,626 INFO L87 Difference]: Start difference. First operand 2479 states and 6268 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:19,262 INFO L93 Difference]: Finished difference Result 4082 states and 10235 transitions. [2022-02-11 00:45:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:45:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:19,268 INFO L225 Difference]: With dead ends: 4082 [2022-02-11 00:45:19,268 INFO L226 Difference]: Without dead ends: 4055 [2022-02-11 00:45:19,268 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=653, Invalid=5047, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:45:19,268 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 443 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:19,268 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 198 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:45:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2022-02-11 00:45:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 2462. [2022-02-11 00:45:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 2.5286468915075173) internal successors, (6223), 2461 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 6223 transitions. [2022-02-11 00:45:19,303 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 6223 transitions. Word has length 30 [2022-02-11 00:45:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:19,303 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 6223 transitions. [2022-02-11 00:45:19,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 6223 transitions. [2022-02-11 00:45:19,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:19,306 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:19,306 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:19,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:19,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,519 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1722930192, now seen corresponding path program 27 times [2022-02-11 00:45:19,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:19,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339511274] [2022-02-11 00:45:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:19,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:19,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:19,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339511274] [2022-02-11 00:45:19,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339511274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:19,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695793733] [2022-02-11 00:45:19,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:19,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:19,703 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) [2022-02-11 00:45:19,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-11 00:45:19,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:45:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:19,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:19,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:45:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:19,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:20,127 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:20,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:20,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:20,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:20,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695793733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:20,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:20,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:45:20,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985490875] [2022-02-11 00:45:20,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:20,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:45:20,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:45:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:45:20,191 INFO L87 Difference]: Start difference. First operand 2462 states and 6223 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:21,558 INFO L93 Difference]: Finished difference Result 4111 states and 10284 transitions. [2022-02-11 00:45:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:45:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:21,564 INFO L225 Difference]: With dead ends: 4111 [2022-02-11 00:45:21,564 INFO L226 Difference]: Without dead ends: 4101 [2022-02-11 00:45:21,565 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=2511, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:45:21,565 INFO L934 BasicCegarLoop]: 37 mSDtfsCounter, 406 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:21,565 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 401 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:45:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2022-02-11 00:45:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 2450. [2022-02-11 00:45:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2449 states have (on average 2.5300122498979176) internal successors, (6196), 2449 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 6196 transitions. [2022-02-11 00:45:21,602 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 6196 transitions. Word has length 30 [2022-02-11 00:45:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:21,602 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 6196 transitions. [2022-02-11 00:45:21,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 6196 transitions. [2022-02-11 00:45:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:21,605 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:21,605 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:21,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:21,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-02-11 00:45:21,821 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2009648608, now seen corresponding path program 38 times [2022-02-11 00:45:21,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:21,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144907689] [2022-02-11 00:45:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:21,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:22,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144907689] [2022-02-11 00:45:22,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144907689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:22,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632668572] [2022-02-11 00:45:22,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:22,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:22,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:22,061 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) [2022-02-11 00:45:22,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-11 00:45:22,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:22,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:45:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:22,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:22,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2022-02-11 00:45:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:22,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:22,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:22,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:22,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:45:22,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:45:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:23,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632668572] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:23,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:23,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 37 [2022-02-11 00:45:23,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515894407] [2022-02-11 00:45:23,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:23,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:45:23,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:23,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:45:23,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:45:23,015 INFO L87 Difference]: Start difference. First operand 2450 states and 6196 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:25,327 INFO L93 Difference]: Finished difference Result 4016 states and 10137 transitions. [2022-02-11 00:45:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:45:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:25,333 INFO L225 Difference]: With dead ends: 4016 [2022-02-11 00:45:25,333 INFO L226 Difference]: Without dead ends: 4003 [2022-02-11 00:45:25,334 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=927, Invalid=4475, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:45:25,334 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 439 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1696 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:25,334 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 188 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 931 Invalid, 0 Unknown, 1696 Unchecked, 0.4s Time] [2022-02-11 00:45:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2022-02-11 00:45:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 2501. [2022-02-11 00:45:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 2.5336) internal successors, (6334), 2500 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 6334 transitions. [2022-02-11 00:45:25,369 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 6334 transitions. Word has length 30 [2022-02-11 00:45:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:25,369 INFO L470 AbstractCegarLoop]: Abstraction has 2501 states and 6334 transitions. [2022-02-11 00:45:25,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 6334 transitions. [2022-02-11 00:45:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:25,372 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:25,372 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:25,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:25,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-11 00:45:25,588 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2141913320, now seen corresponding path program 39 times [2022-02-11 00:45:25,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:25,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294441688] [2022-02-11 00:45:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:25,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:25,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:25,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294441688] [2022-02-11 00:45:25,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294441688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:25,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609507060] [2022-02-11 00:45:25,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:25,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:25,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:25,875 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) [2022-02-11 00:45:25,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-11 00:45:25,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:45:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:25,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:25,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:26,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:45:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:26,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:26,414 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:26,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:26,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:26,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:26,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:26,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609507060] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:26,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:26,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:45:26,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524822513] [2022-02-11 00:45:26,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:26,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:45:26,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:45:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:45:26,498 INFO L87 Difference]: Start difference. First operand 2501 states and 6334 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:28,378 INFO L93 Difference]: Finished difference Result 4529 states and 11503 transitions. [2022-02-11 00:45:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:45:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:28,384 INFO L225 Difference]: With dead ends: 4529 [2022-02-11 00:45:28,385 INFO L226 Difference]: Without dead ends: 4520 [2022-02-11 00:45:28,385 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=3386, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:45:28,385 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 232 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2570 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:28,385 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 239 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2570 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:45:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-02-11 00:45:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 2530. [2022-02-11 00:45:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 2.5322261763542904) internal successors, (6404), 2529 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 6404 transitions. [2022-02-11 00:45:28,418 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 6404 transitions. Word has length 30 [2022-02-11 00:45:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:28,418 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 6404 transitions. [2022-02-11 00:45:28,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 6404 transitions. [2022-02-11 00:45:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:28,420 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:28,420 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:28,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:28,633 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,SelfDestructingSolverStorable145 [2022-02-11 00:45:28,633 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2003483948, now seen corresponding path program 40 times [2022-02-11 00:45:28,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:28,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552844868] [2022-02-11 00:45:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:28,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:28,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:28,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552844868] [2022-02-11 00:45:28,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552844868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:28,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837128153] [2022-02-11 00:45:28,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:28,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:28,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:28,842 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) [2022-02-11 00:45:28,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-11 00:45:28,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:28,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:28,863 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:29,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:45:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:29,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:29,306 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:29,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:45:29,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:29,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:29,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:29,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:29,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837128153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:29,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:29,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:45:29,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152299948] [2022-02-11 00:45:29,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:29,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:45:29,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:45:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:45:29,377 INFO L87 Difference]: Start difference. First operand 2530 states and 6404 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:30,988 INFO L93 Difference]: Finished difference Result 4749 states and 11904 transitions. [2022-02-11 00:45:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:45:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:30,994 INFO L225 Difference]: With dead ends: 4749 [2022-02-11 00:45:30,995 INFO L226 Difference]: Without dead ends: 4708 [2022-02-11 00:45:30,995 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=3657, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:45:30,995 INFO L934 BasicCegarLoop]: 35 mSDtfsCounter, 356 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:30,995 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 420 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:45:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2022-02-11 00:45:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 2565. [2022-02-11 00:45:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2564 states have (on average 2.531201248049922) internal successors, (6490), 2564 states have internal predecessors, (6490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 6490 transitions. [2022-02-11 00:45:31,059 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 6490 transitions. Word has length 30 [2022-02-11 00:45:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:31,059 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 6490 transitions. [2022-02-11 00:45:31,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 6490 transitions. [2022-02-11 00:45:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:31,062 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:31,062 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:31,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:31,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:31,278 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash 978238324, now seen corresponding path program 41 times [2022-02-11 00:45:31,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:31,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232934280] [2022-02-11 00:45:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:31,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:31,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232934280] [2022-02-11 00:45:31,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232934280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:31,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824645164] [2022-02-11 00:45:31,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:31,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:31,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:31,472 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) [2022-02-11 00:45:31,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-11 00:45:31,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:45:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:31,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:31,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-02-11 00:45:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:31,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:31,925 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:31,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:45:31,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:31,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:31,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:31,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824645164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:31,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:31,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:45:31,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687598141] [2022-02-11 00:45:31,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:31,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:45:31,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:45:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:45:31,988 INFO L87 Difference]: Start difference. First operand 2565 states and 6490 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:33,138 INFO L93 Difference]: Finished difference Result 4328 states and 10886 transitions. [2022-02-11 00:45:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 00:45:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:33,144 INFO L225 Difference]: With dead ends: 4328 [2022-02-11 00:45:33,144 INFO L226 Difference]: Without dead ends: 4315 [2022-02-11 00:45:33,145 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:45:33,145 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 352 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:33,145 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 389 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:45:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2022-02-11 00:45:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2573. [2022-02-11 00:45:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 2.530326594090202) internal successors, (6508), 2572 states have internal predecessors, (6508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 6508 transitions. [2022-02-11 00:45:33,178 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 6508 transitions. Word has length 30 [2022-02-11 00:45:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:33,179 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 6508 transitions. [2022-02-11 00:45:33,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 6508 transitions. [2022-02-11 00:45:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:33,181 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:33,181 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:33,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:33,390 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,SelfDestructingSolverStorable147 [2022-02-11 00:45:33,390 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash -747405660, now seen corresponding path program 42 times [2022-02-11 00:45:33,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:33,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864116287] [2022-02-11 00:45:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:33,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:33,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:33,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864116287] [2022-02-11 00:45:33,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864116287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:33,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820745995] [2022-02-11 00:45:33,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:33,689 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) [2022-02-11 00:45:33,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-11 00:45:33,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:45:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:33,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:45:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:33,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:45:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:33,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:34,111 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:34,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:45:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:34,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:34,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:34,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820745995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:34,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:34,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:45:34,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455248763] [2022-02-11 00:45:34,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:34,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:45:34,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:45:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:34,196 INFO L87 Difference]: Start difference. First operand 2573 states and 6508 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:36,445 INFO L93 Difference]: Finished difference Result 5160 states and 13118 transitions. [2022-02-11 00:45:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:45:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:36,452 INFO L225 Difference]: With dead ends: 5160 [2022-02-11 00:45:36,452 INFO L226 Difference]: Without dead ends: 5122 [2022-02-11 00:45:36,452 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=905, Invalid=6751, Unknown=0, NotChecked=0, Total=7656 [2022-02-11 00:45:36,452 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 375 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:36,452 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 288 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:45:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2022-02-11 00:45:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 2606. [2022-02-11 00:45:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 2.530902111324376) internal successors, (6593), 2605 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 6593 transitions. [2022-02-11 00:45:36,492 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 6593 transitions. Word has length 30 [2022-02-11 00:45:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:36,492 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 6593 transitions. [2022-02-11 00:45:36,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 6593 transitions. [2022-02-11 00:45:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:36,495 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:36,495 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:36,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:36,708 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,SelfDestructingSolverStorable148 [2022-02-11 00:45:36,708 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash 781548408, now seen corresponding path program 43 times [2022-02-11 00:45:36,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:36,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665068959] [2022-02-11 00:45:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:36,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:36,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665068959] [2022-02-11 00:45:36,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665068959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:36,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934339037] [2022-02-11 00:45:36,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:45:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:36,905 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) [2022-02-11 00:45:36,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-11 00:45:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:36,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:37,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:45:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:37,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:37,333 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:37,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:45:37,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:37,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:37,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:37,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934339037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:37,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:37,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:45:37,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563346474] [2022-02-11 00:45:37,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:37,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:45:37,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:45:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:45:37,400 INFO L87 Difference]: Start difference. First operand 2606 states and 6593 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:39,328 INFO L93 Difference]: Finished difference Result 4454 states and 11219 transitions. [2022-02-11 00:45:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:45:39,328 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:39,335 INFO L225 Difference]: With dead ends: 4454 [2022-02-11 00:45:39,335 INFO L226 Difference]: Without dead ends: 4413 [2022-02-11 00:45:39,335 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=556, Invalid=4000, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:45:39,336 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 369 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:39,336 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 298 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:45:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2022-02-11 00:45:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 2606. [2022-02-11 00:45:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 2.530134357005758) internal successors, (6591), 2605 states have internal predecessors, (6591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 6591 transitions. [2022-02-11 00:45:39,378 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 6591 transitions. Word has length 30 [2022-02-11 00:45:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:39,378 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 6591 transitions. [2022-02-11 00:45:39,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 6591 transitions. [2022-02-11 00:45:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:39,381 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:39,381 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:39,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:39,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:39,594 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1581347362, now seen corresponding path program 44 times [2022-02-11 00:45:39,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:39,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864652832] [2022-02-11 00:45:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:39,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:39,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864652832] [2022-02-11 00:45:39,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864652832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:39,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049309955] [2022-02-11 00:45:39,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:45:39,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:39,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:39,811 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) [2022-02-11 00:45:39,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-11 00:45:39,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:45:39,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:39,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:40,096 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:45:40,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 39 [2022-02-11 00:45:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:40,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:40,310 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:40,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:40,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:40,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:40,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049309955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:40,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:40,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:45:40,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031230529] [2022-02-11 00:45:40,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:40,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:45:40,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:45:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:40,377 INFO L87 Difference]: Start difference. First operand 2606 states and 6591 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:43,858 INFO L93 Difference]: Finished difference Result 4497 states and 11232 transitions. [2022-02-11 00:45:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 00:45:43,858 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:43,864 INFO L225 Difference]: With dead ends: 4497 [2022-02-11 00:45:43,865 INFO L226 Difference]: Without dead ends: 4458 [2022-02-11 00:45:43,865 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=969, Invalid=6863, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 00:45:43,865 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 622 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 3432 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 3432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:43,865 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 283 Invalid, 3867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 3432 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 00:45:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2022-02-11 00:45:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 2618. [2022-02-11 00:45:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 2.5288498280473823) internal successors, (6618), 2617 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 6618 transitions. [2022-02-11 00:45:43,901 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 6618 transitions. Word has length 30 [2022-02-11 00:45:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:43,901 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 6618 transitions. [2022-02-11 00:45:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 6618 transitions. [2022-02-11 00:45:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:43,904 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:43,904 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:43,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:44,118 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,SelfDestructingSolverStorable150 [2022-02-11 00:45:44,118 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash -805575938, now seen corresponding path program 45 times [2022-02-11 00:45:44,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:44,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433431435] [2022-02-11 00:45:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:44,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:44,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:44,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433431435] [2022-02-11 00:45:44,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433431435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:44,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196356836] [2022-02-11 00:45:44,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:45:44,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:44,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:44,376 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) [2022-02-11 00:45:44,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-11 00:45:44,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:45:44,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:44,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:44,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:45:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:44,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:44,919 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:44,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:44,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:44,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:44,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:44,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:44,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196356836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:44,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:44,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:45:44,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987710657] [2022-02-11 00:45:44,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:44,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:45:44,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:45:44,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:44,992 INFO L87 Difference]: Start difference. First operand 2618 states and 6618 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:49,531 INFO L93 Difference]: Finished difference Result 5187 states and 13000 transitions. [2022-02-11 00:45:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-11 00:45:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:49,537 INFO L225 Difference]: With dead ends: 5187 [2022-02-11 00:45:49,537 INFO L226 Difference]: Without dead ends: 5172 [2022-02-11 00:45:49,538 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1611, Invalid=11271, Unknown=0, NotChecked=0, Total=12882 [2022-02-11 00:45:49,538 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 631 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 2761 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:49,538 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 177 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2761 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:45:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2022-02-11 00:45:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 2621. [2022-02-11 00:45:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 2.5286259541984735) internal successors, (6625), 2620 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 6625 transitions. [2022-02-11 00:45:49,574 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 6625 transitions. Word has length 30 [2022-02-11 00:45:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:49,575 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 6625 transitions. [2022-02-11 00:45:49,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 6625 transitions. [2022-02-11 00:45:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:49,577 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:49,577 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:49,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-02-11 00:45:49,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:49,793 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:49,793 INFO L85 PathProgramCache]: Analyzing trace with hash -140372770, now seen corresponding path program 46 times [2022-02-11 00:45:49,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:49,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559229273] [2022-02-11 00:45:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:50,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:50,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559229273] [2022-02-11 00:45:50,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559229273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:50,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618599741] [2022-02-11 00:45:50,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:45:50,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:50,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:50,044 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) [2022-02-11 00:45:50,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-11 00:45:50,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:45:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:50,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:50,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:45:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:50,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:50,524 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:50,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:45:50,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:50,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:50,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:50,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618599741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:50,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:50,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:45:50,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804984790] [2022-02-11 00:45:50,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:50,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:45:50,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:45:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:50,622 INFO L87 Difference]: Start difference. First operand 2621 states and 6625 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:53,520 INFO L93 Difference]: Finished difference Result 4726 states and 11885 transitions. [2022-02-11 00:45:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:45:53,520 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:53,527 INFO L225 Difference]: With dead ends: 4726 [2022-02-11 00:45:53,527 INFO L226 Difference]: Without dead ends: 4699 [2022-02-11 00:45:53,527 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=831, Invalid=5975, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:45:53,528 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 539 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:53,528 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 223 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:45:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2022-02-11 00:45:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 2621. [2022-02-11 00:45:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 2.5282442748091603) internal successors, (6624), 2620 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 6624 transitions. [2022-02-11 00:45:53,565 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 6624 transitions. Word has length 30 [2022-02-11 00:45:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:53,566 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 6624 transitions. [2022-02-11 00:45:53,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 6624 transitions. [2022-02-11 00:45:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:53,568 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:53,568 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:53,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:53,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:53,784 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash 857880540, now seen corresponding path program 47 times [2022-02-11 00:45:53,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:53,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968450485] [2022-02-11 00:45:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:53,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:53,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968450485] [2022-02-11 00:45:53,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968450485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:53,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578201591] [2022-02-11 00:45:53,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:45:53,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:53,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:53,982 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) [2022-02-11 00:45:53,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-11 00:45:54,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:45:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:54,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:54,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:45:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:54,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:54,454 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:54,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:54,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:54,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:54,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:54,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578201591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:54,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:54,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:45:54,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158340611] [2022-02-11 00:45:54,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:54,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:45:54,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:54,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:45:54,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:45:54,523 INFO L87 Difference]: Start difference. First operand 2621 states and 6624 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:57,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:45:57,763 INFO L93 Difference]: Finished difference Result 4475 states and 11178 transitions. [2022-02-11 00:45:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-11 00:45:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:45:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:45:57,769 INFO L225 Difference]: With dead ends: 4475 [2022-02-11 00:45:57,770 INFO L226 Difference]: Without dead ends: 4448 [2022-02-11 00:45:57,770 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2659 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1057, Invalid=7315, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 00:45:57,771 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 678 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:45:57,771 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 224 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 2875 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:45:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-02-11 00:45:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 2617. [2022-02-11 00:45:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2616 states have (on average 2.529051987767584) internal successors, (6616), 2616 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 6616 transitions. [2022-02-11 00:45:57,812 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 6616 transitions. Word has length 30 [2022-02-11 00:45:57,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:45:57,812 INFO L470 AbstractCegarLoop]: Abstraction has 2617 states and 6616 transitions. [2022-02-11 00:45:57,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:45:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 6616 transitions. [2022-02-11 00:45:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:45:57,814 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:45:57,815 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:45:57,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-11 00:45:58,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:58,022 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:45:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:45:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash 467774620, now seen corresponding path program 48 times [2022-02-11 00:45:58,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:45:58,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964968381] [2022-02-11 00:45:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:45:58,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:45:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:45:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:58,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:45:58,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964968381] [2022-02-11 00:45:58,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964968381] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:45:58,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308568394] [2022-02-11 00:45:58,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:45:58,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:45:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:45:58,314 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) [2022-02-11 00:45:58,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-11 00:45:58,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:45:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:45:58,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:45:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:45:58,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:45:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:58,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:45:58,874 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:45:58,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:45:58,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:58,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:45:58,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:45:58,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:45:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:45:58,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308568394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:45:58,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:45:58,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:45:58,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254628555] [2022-02-11 00:45:58,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:45:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:45:58,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:45:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:45:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:45:58,947 INFO L87 Difference]: Start difference. First operand 2617 states and 6616 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:01,129 INFO L93 Difference]: Finished difference Result 5264 states and 13360 transitions. [2022-02-11 00:46:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:46:01,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:01,136 INFO L225 Difference]: With dead ends: 5264 [2022-02-11 00:46:01,137 INFO L226 Difference]: Without dead ends: 5251 [2022-02-11 00:46:01,137 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1857 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=764, Invalid=5088, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:46:01,137 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 425 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:01,137 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 214 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:46:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2022-02-11 00:46:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 2651. [2022-02-11 00:46:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 2.529811320754717) internal successors, (6704), 2650 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 6704 transitions. [2022-02-11 00:46:01,179 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 6704 transitions. Word has length 30 [2022-02-11 00:46:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:01,179 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 6704 transitions. [2022-02-11 00:46:01,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 6704 transitions. [2022-02-11 00:46:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:01,182 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:01,182 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:01,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:01,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:01,398 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2070791626, now seen corresponding path program 49 times [2022-02-11 00:46:01,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:01,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113231481] [2022-02-11 00:46:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:01,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:01,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:01,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113231481] [2022-02-11 00:46:01,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113231481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:01,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014867754] [2022-02-11 00:46:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:01,606 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) [2022-02-11 00:46:01,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-11 00:46:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:01,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:01,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:46:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:01,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:02,020 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:02,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:46:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:02,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:02,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014867754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:02,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:02,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:46:02,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294956604] [2022-02-11 00:46:02,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:02,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:02,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:02,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:02,090 INFO L87 Difference]: Start difference. First operand 2651 states and 6704 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:04,862 INFO L93 Difference]: Finished difference Result 5028 states and 12745 transitions. [2022-02-11 00:46:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:46:04,862 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:04,870 INFO L225 Difference]: With dead ends: 5028 [2022-02-11 00:46:04,870 INFO L226 Difference]: Without dead ends: 4991 [2022-02-11 00:46:04,871 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=956, Invalid=6354, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:46:04,871 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 373 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:04,871 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 266 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:46:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2022-02-11 00:46:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 2654. [2022-02-11 00:46:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 2.528458349038824) internal successors, (6708), 2653 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 6708 transitions. [2022-02-11 00:46:04,930 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 6708 transitions. Word has length 30 [2022-02-11 00:46:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:04,930 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 6708 transitions. [2022-02-11 00:46:04,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 6708 transitions. [2022-02-11 00:46:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:04,932 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:04,932 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:04,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:05,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:05,147 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -541837558, now seen corresponding path program 50 times [2022-02-11 00:46:05,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:05,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833054398] [2022-02-11 00:46:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:05,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:05,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833054398] [2022-02-11 00:46:05,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833054398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:05,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248057525] [2022-02-11 00:46:05,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:05,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:05,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:05,350 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) [2022-02-11 00:46:05,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-11 00:46:05,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:05,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:05,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:46:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:05,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:06,018 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:06,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:46:06,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:06,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:06,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:06,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:06,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248057525] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:06,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:06,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-11 00:46:06,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786229930] [2022-02-11 00:46:06,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:06,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:46:06,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:46:06,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:46:06,131 INFO L87 Difference]: Start difference. First operand 2654 states and 6708 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:07,959 INFO L93 Difference]: Finished difference Result 4621 states and 11693 transitions. [2022-02-11 00:46:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:46:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:07,967 INFO L225 Difference]: With dead ends: 4621 [2022-02-11 00:46:07,967 INFO L226 Difference]: Without dead ends: 4608 [2022-02-11 00:46:07,967 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=3346, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 00:46:07,968 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 265 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:07,968 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 337 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:46:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2022-02-11 00:46:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 2645. [2022-02-11 00:46:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.527987897125567) internal successors, (6684), 2644 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 6684 transitions. [2022-02-11 00:46:08,005 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 6684 transitions. Word has length 30 [2022-02-11 00:46:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:08,005 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 6684 transitions. [2022-02-11 00:46:08,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 6684 transitions. [2022-02-11 00:46:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:08,008 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:08,008 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:08,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:08,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-11 00:46:08,224 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:08,224 INFO L85 PathProgramCache]: Analyzing trace with hash 532408126, now seen corresponding path program 51 times [2022-02-11 00:46:08,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:08,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326322536] [2022-02-11 00:46:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:08,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:08,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:08,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326322536] [2022-02-11 00:46:08,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326322536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:08,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701180455] [2022-02-11 00:46:08,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:08,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:08,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:08,479 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) [2022-02-11 00:46:08,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-11 00:46:08,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:46:08,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:08,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:46:08,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:08,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:08,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-02-11 00:46:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:08,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:09,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:09,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-02-11 00:46:09,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 00:46:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:09,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701180455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:09,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:09,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 36 [2022-02-11 00:46:09,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175539600] [2022-02-11 00:46:09,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:09,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:46:09,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:46:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:46:09,470 INFO L87 Difference]: Start difference. First operand 2645 states and 6684 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:12,776 INFO L93 Difference]: Finished difference Result 4820 states and 12265 transitions. [2022-02-11 00:46:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 00:46:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:12,783 INFO L225 Difference]: With dead ends: 4820 [2022-02-11 00:46:12,783 INFO L226 Difference]: Without dead ends: 4811 [2022-02-11 00:46:12,783 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1134, Invalid=7238, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 00:46:12,783 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 348 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:12,783 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 271 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2527 Invalid, 0 Unknown, 380 Unchecked, 1.1s Time] [2022-02-11 00:46:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2022-02-11 00:46:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 2680. [2022-02-11 00:46:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2679 states have (on average 2.528555431131019) internal successors, (6774), 2679 states have internal predecessors, (6774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 6774 transitions. [2022-02-11 00:46:12,821 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 6774 transitions. Word has length 30 [2022-02-11 00:46:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:12,821 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 6774 transitions. [2022-02-11 00:46:12,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 6774 transitions. [2022-02-11 00:46:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:12,823 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:12,823 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:12,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:13,039 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,SelfDestructingSolverStorable157 [2022-02-11 00:46:13,039 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2006158120, now seen corresponding path program 52 times [2022-02-11 00:46:13,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:13,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477694356] [2022-02-11 00:46:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:13,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:13,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477694356] [2022-02-11 00:46:13,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477694356] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:13,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353948667] [2022-02-11 00:46:13,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:13,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:13,316 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) [2022-02-11 00:46:13,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-11 00:46:13,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:13,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:13,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:13,635 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:46:13,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 37 [2022-02-11 00:46:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:13,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:13,959 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:13,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:46:14,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:14,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:14,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:14,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:14,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353948667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:14,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:14,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:46:14,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940799465] [2022-02-11 00:46:14,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:14,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:14,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:14,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:14,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:14,055 INFO L87 Difference]: Start difference. First operand 2680 states and 6774 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:16,383 INFO L93 Difference]: Finished difference Result 4679 states and 11809 transitions. [2022-02-11 00:46:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 00:46:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:16,389 INFO L225 Difference]: With dead ends: 4679 [2022-02-11 00:46:16,389 INFO L226 Difference]: Without dead ends: 4657 [2022-02-11 00:46:16,389 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=698, Invalid=5002, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:46:16,389 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 404 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:16,389 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 196 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:46:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2022-02-11 00:46:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 2684. [2022-02-11 00:46:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2683 states have (on average 2.527767424524786) internal successors, (6782), 2683 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 6782 transitions. [2022-02-11 00:46:16,424 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 6782 transitions. Word has length 30 [2022-02-11 00:46:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:16,424 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 6782 transitions. [2022-02-11 00:46:16,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 6782 transitions. [2022-02-11 00:46:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:16,426 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:16,426 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:16,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-02-11 00:46:16,639 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,SelfDestructingSolverStorable158 [2022-02-11 00:46:16,639 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -884493338, now seen corresponding path program 53 times [2022-02-11 00:46:16,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:16,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849578551] [2022-02-11 00:46:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:16,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:16,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:16,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849578551] [2022-02-11 00:46:16,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849578551] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:16,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114553714] [2022-02-11 00:46:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:16,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:16,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:16,870 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) [2022-02-11 00:46:16,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-11 00:46:16,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:46:16,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:16,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:17,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:46:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:17,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:17,300 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:17,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:17,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:17,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:17,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:17,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114553714] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:17,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:17,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:46:17,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553273388] [2022-02-11 00:46:17,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:17,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:17,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:17,366 INFO L87 Difference]: Start difference. First operand 2684 states and 6782 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:20,943 INFO L93 Difference]: Finished difference Result 5069 states and 12712 transitions. [2022-02-11 00:46:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-11 00:46:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:20,950 INFO L225 Difference]: With dead ends: 5069 [2022-02-11 00:46:20,950 INFO L226 Difference]: Without dead ends: 5048 [2022-02-11 00:46:20,951 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4303 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1491, Invalid=10941, Unknown=0, NotChecked=0, Total=12432 [2022-02-11 00:46:20,951 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 547 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 2144 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:20,951 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 126 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2144 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:46:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2022-02-11 00:46:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 2655. [2022-02-11 00:46:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 2.527128862094951) internal successors, (6707), 2654 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 6707 transitions. [2022-02-11 00:46:20,989 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 6707 transitions. Word has length 30 [2022-02-11 00:46:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:20,989 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 6707 transitions. [2022-02-11 00:46:20,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 6707 transitions. [2022-02-11 00:46:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:20,992 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:20,992 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:21,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-11 00:46:21,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:21,207 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1892182204, now seen corresponding path program 54 times [2022-02-11 00:46:21,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:21,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069053753] [2022-02-11 00:46:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:21,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:21,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:21,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069053753] [2022-02-11 00:46:21,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069053753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:21,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024992553] [2022-02-11 00:46:21,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:46:21,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:21,513 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) [2022-02-11 00:46:21,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-11 00:46:21,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:46:21,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:21,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:21,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 00:46:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:21,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:22,066 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:22,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:22,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:22,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:22,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:22,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:22,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024992553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:22,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:22,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:46:22,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809709109] [2022-02-11 00:46:22,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:22,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:46:22,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:46:22,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:46:22,159 INFO L87 Difference]: Start difference. First operand 2655 states and 6707 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:26,211 INFO L93 Difference]: Finished difference Result 4423 states and 11054 transitions. [2022-02-11 00:46:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-11 00:46:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:26,218 INFO L225 Difference]: With dead ends: 4423 [2022-02-11 00:46:26,218 INFO L226 Difference]: Without dead ends: 4401 [2022-02-11 00:46:26,218 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1078, Invalid=8822, Unknown=0, NotChecked=0, Total=9900 [2022-02-11 00:46:26,218 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 609 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:26,219 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 172 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2974 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 00:46:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-02-11 00:46:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2652. [2022-02-11 00:46:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 2.5277253866465483) internal successors, (6701), 2651 states have internal predecessors, (6701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 6701 transitions. [2022-02-11 00:46:26,254 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 6701 transitions. Word has length 30 [2022-02-11 00:46:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:26,254 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 6701 transitions. [2022-02-11 00:46:26,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 6701 transitions. [2022-02-11 00:46:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:26,257 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:26,257 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:26,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:26,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:26,473 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1451097388, now seen corresponding path program 28 times [2022-02-11 00:46:26,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:26,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272002174] [2022-02-11 00:46:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:26,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:26,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272002174] [2022-02-11 00:46:26,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272002174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:26,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727932505] [2022-02-11 00:46:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:26,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:26,724 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) [2022-02-11 00:46:26,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-11 00:46:26,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:26,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:26,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:26,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:46:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:27,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:27,186 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:27,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:27,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:27,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:46:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:27,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727932505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:27,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:27,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:46:27,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124998032] [2022-02-11 00:46:27,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:27,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:46:27,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:46:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:46:27,255 INFO L87 Difference]: Start difference. First operand 2652 states and 6701 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:32,114 INFO L93 Difference]: Finished difference Result 4992 states and 12473 transitions. [2022-02-11 00:46:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-11 00:46:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:32,121 INFO L225 Difference]: With dead ends: 4992 [2022-02-11 00:46:32,121 INFO L226 Difference]: Without dead ends: 4963 [2022-02-11 00:46:32,122 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4716 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1562, Invalid=12010, Unknown=0, NotChecked=0, Total=13572 [2022-02-11 00:46:32,122 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 706 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 3754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:32,122 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 233 Invalid, 3754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:46:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2022-02-11 00:46:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 2691. [2022-02-11 00:46:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 2.527509293680297) internal successors, (6799), 2690 states have internal predecessors, (6799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 6799 transitions. [2022-02-11 00:46:32,159 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 6799 transitions. Word has length 30 [2022-02-11 00:46:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:32,159 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 6799 transitions. [2022-02-11 00:46:32,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 6799 transitions. [2022-02-11 00:46:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:32,162 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:32,162 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:32,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-11 00:46:32,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:32,377 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash 830610252, now seen corresponding path program 29 times [2022-02-11 00:46:32,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:32,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888713643] [2022-02-11 00:46:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:32,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:32,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:32,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888713643] [2022-02-11 00:46:32,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888713643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:32,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778776361] [2022-02-11 00:46:32,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:32,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:32,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:32,719 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) [2022-02-11 00:46:32,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-11 00:46:32,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:46:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:32,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:32,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:46:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:33,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:33,265 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:33,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:33,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:33,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:33,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:33,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:46:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:33,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778776361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:33,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:33,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:46:33,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047889898] [2022-02-11 00:46:33,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:33,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:46:33,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:46:33,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:46:33,338 INFO L87 Difference]: Start difference. First operand 2691 states and 6799 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:38,749 INFO L93 Difference]: Finished difference Result 5780 states and 14482 transitions. [2022-02-11 00:46:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-11 00:46:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:38,756 INFO L225 Difference]: With dead ends: 5780 [2022-02-11 00:46:38,757 INFO L226 Difference]: Without dead ends: 5751 [2022-02-11 00:46:38,758 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7718 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2333, Invalid=17973, Unknown=0, NotChecked=0, Total=20306 [2022-02-11 00:46:38,761 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 700 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:38,761 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 209 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 00:46:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2022-02-11 00:46:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 2682. [2022-02-11 00:46:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2681 states have (on average 2.5274151436031334) internal successors, (6776), 2681 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 6776 transitions. [2022-02-11 00:46:38,803 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 6776 transitions. Word has length 30 [2022-02-11 00:46:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:38,803 INFO L470 AbstractCegarLoop]: Abstraction has 2682 states and 6776 transitions. [2022-02-11 00:46:38,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 6776 transitions. [2022-02-11 00:46:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:38,806 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:38,806 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:38,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:39,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:39,019 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1495813420, now seen corresponding path program 30 times [2022-02-11 00:46:39,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:39,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823993038] [2022-02-11 00:46:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:39,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:39,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823993038] [2022-02-11 00:46:39,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823993038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:39,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5499715] [2022-02-11 00:46:39,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:46:39,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:39,336 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) [2022-02-11 00:46:39,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-11 00:46:39,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:46:39,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:39,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:39,691 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:46:39,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 44 [2022-02-11 00:46:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:39,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:39,989 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:39,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:40,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:40,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:40,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:40,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5499715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:40,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:40,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:46:40,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715084064] [2022-02-11 00:46:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:40,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:40,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:40,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:40,093 INFO L87 Difference]: Start difference. First operand 2682 states and 6776 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:42,981 INFO L93 Difference]: Finished difference Result 4983 states and 12548 transitions. [2022-02-11 00:46:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 00:46:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:42,989 INFO L225 Difference]: With dead ends: 4983 [2022-02-11 00:46:42,989 INFO L226 Difference]: Without dead ends: 4949 [2022-02-11 00:46:42,989 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1014, Invalid=8298, Unknown=0, NotChecked=0, Total=9312 [2022-02-11 00:46:42,990 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 520 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 2876 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:42,990 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 212 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2876 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:46:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2022-02-11 00:46:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 2682. [2022-02-11 00:46:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2681 states have (on average 2.526296158149944) internal successors, (6773), 2681 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 6773 transitions. [2022-02-11 00:46:43,027 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 6773 transitions. Word has length 30 [2022-02-11 00:46:43,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:43,027 INFO L470 AbstractCegarLoop]: Abstraction has 2682 states and 6773 transitions. [2022-02-11 00:46:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 6773 transitions. [2022-02-11 00:46:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:43,030 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:43,030 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:43,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:43,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:43,243 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1918142958, now seen corresponding path program 31 times [2022-02-11 00:46:43,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:43,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714410334] [2022-02-11 00:46:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:43,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714410334] [2022-02-11 00:46:43,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714410334] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023133474] [2022-02-11 00:46:43,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:46:43,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:43,537 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) [2022-02-11 00:46:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-11 00:46:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:43,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:43,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-11 00:46:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:43,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:44,155 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:44,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:44,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:44,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:44,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:44,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:46:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:44,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023133474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:44,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:44,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:46:44,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331834256] [2022-02-11 00:46:44,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:44,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:44,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:44,269 INFO L87 Difference]: Start difference. First operand 2682 states and 6773 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:46,578 INFO L93 Difference]: Finished difference Result 5115 states and 12936 transitions. [2022-02-11 00:46:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:46:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:46,586 INFO L225 Difference]: With dead ends: 5115 [2022-02-11 00:46:46,586 INFO L226 Difference]: Without dead ends: 5096 [2022-02-11 00:46:46,587 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=714, Invalid=5448, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 00:46:46,587 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 406 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:46,587 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 188 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:46:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2022-02-11 00:46:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 2691. [2022-02-11 00:46:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 2.5256505576208177) internal successors, (6794), 2690 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 6794 transitions. [2022-02-11 00:46:46,640 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 6794 transitions. Word has length 30 [2022-02-11 00:46:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:46,640 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 6794 transitions. [2022-02-11 00:46:46,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 6794 transitions. [2022-02-11 00:46:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:46,643 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:46,643 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:46,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-11 00:46:46,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:46,858 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:46,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash -620423288, now seen corresponding path program 32 times [2022-02-11 00:46:46,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:46,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746996969] [2022-02-11 00:46:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:46,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:47,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:47,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746996969] [2022-02-11 00:46:47,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746996969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:47,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143989316] [2022-02-11 00:46:47,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:46:47,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:47,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:47,152 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) [2022-02-11 00:46:47,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-11 00:46:47,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:46:47,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:47,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:47,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:47,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:46:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:47,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:47,760 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:47,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:47,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:47,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:47,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143989316] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:47,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:47,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:46:47,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746845566] [2022-02-11 00:46:47,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:47,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:46:47,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:46:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:46:47,839 INFO L87 Difference]: Start difference. First operand 2691 states and 6794 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:49,762 INFO L93 Difference]: Finished difference Result 4542 states and 11490 transitions. [2022-02-11 00:46:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 00:46:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:49,768 INFO L225 Difference]: With dead ends: 4542 [2022-02-11 00:46:49,768 INFO L226 Difference]: Without dead ends: 4521 [2022-02-11 00:46:49,769 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=562, Invalid=4130, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:46:49,769 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 377 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:49,769 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 184 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:46:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2022-02-11 00:46:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 2692. [2022-02-11 00:46:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.525455221107395) internal successors, (6796), 2691 states have internal predecessors, (6796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 6796 transitions. [2022-02-11 00:46:49,805 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 6796 transitions. Word has length 30 [2022-02-11 00:46:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:49,805 INFO L470 AbstractCegarLoop]: Abstraction has 2692 states and 6796 transitions. [2022-02-11 00:46:49,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 6796 transitions. [2022-02-11 00:46:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:49,807 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:49,807 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:49,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:50,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-02-11 00:46:50,017 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:50,018 INFO L85 PathProgramCache]: Analyzing trace with hash -84979080, now seen corresponding path program 33 times [2022-02-11 00:46:50,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:50,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647329941] [2022-02-11 00:46:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:50,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:50,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:50,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647329941] [2022-02-11 00:46:50,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647329941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:50,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134566512] [2022-02-11 00:46:50,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:46:50,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:50,268 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) [2022-02-11 00:46:50,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-11 00:46:50,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:46:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:50,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:46:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:50,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:50,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:46:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:50,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:51,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:51,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:51,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:46:51,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:46:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:51,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134566512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:51,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:51,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:46:51,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842208293] [2022-02-11 00:46:51,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:51,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:46:51,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:46:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:46:51,193 INFO L87 Difference]: Start difference. First operand 2692 states and 6796 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:52,894 INFO L93 Difference]: Finished difference Result 4606 states and 11674 transitions. [2022-02-11 00:46:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 00:46:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:52,900 INFO L225 Difference]: With dead ends: 4606 [2022-02-11 00:46:52,901 INFO L226 Difference]: Without dead ends: 4598 [2022-02-11 00:46:52,901 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=654, Invalid=4316, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:46:52,901 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 296 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:52,901 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 155 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1184 Invalid, 0 Unknown, 891 Unchecked, 0.5s Time] [2022-02-11 00:46:52,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2022-02-11 00:46:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 2725. [2022-02-11 00:46:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 2.525697503671072) internal successors, (6880), 2724 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 6880 transitions. [2022-02-11 00:46:52,938 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 6880 transitions. Word has length 30 [2022-02-11 00:46:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:52,938 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 6880 transitions. [2022-02-11 00:46:52,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 6880 transitions. [2022-02-11 00:46:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:52,941 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:52,941 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:52,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-11 00:46:53,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-11 00:46:53,145 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1795877384, now seen corresponding path program 34 times [2022-02-11 00:46:53,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:53,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625804727] [2022-02-11 00:46:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:53,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:53,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:53,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625804727] [2022-02-11 00:46:53,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625804727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:53,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480201725] [2022-02-11 00:46:53,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:46:53,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:53,486 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) [2022-02-11 00:46:53,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-11 00:46:53,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:46:53,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:53,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:53,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:53,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:46:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:53,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:54,136 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:54,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:54,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:54,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:54,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:46:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:54,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480201725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:54,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:54,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:46:54,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790057376] [2022-02-11 00:46:54,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:54,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:46:54,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:46:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:46:54,209 INFO L87 Difference]: Start difference. First operand 2725 states and 6880 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:56,259 INFO L93 Difference]: Finished difference Result 4623 states and 11653 transitions. [2022-02-11 00:46:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:46:56,259 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:56,266 INFO L225 Difference]: With dead ends: 4623 [2022-02-11 00:46:56,266 INFO L226 Difference]: Without dead ends: 4611 [2022-02-11 00:46:56,266 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=459, Invalid=3701, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:46:56,266 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 341 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:56,266 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 229 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2815 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:46:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2022-02-11 00:46:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 2712. [2022-02-11 00:46:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.5256362965695316) internal successors, (6847), 2711 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 6847 transitions. [2022-02-11 00:46:56,304 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 6847 transitions. Word has length 30 [2022-02-11 00:46:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:56,304 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 6847 transitions. [2022-02-11 00:46:56,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 6847 transitions. [2022-02-11 00:46:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:56,307 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:56,307 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:56,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:56,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-11 00:46:56,521 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1134442340, now seen corresponding path program 35 times [2022-02-11 00:46:56,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:56,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77066050] [2022-02-11 00:46:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:56,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:46:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:56,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:46:56,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77066050] [2022-02-11 00:46:56,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77066050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:46:56,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692639429] [2022-02-11 00:46:56,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:46:56,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:46:56,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:46:56,767 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) [2022-02-11 00:46:56,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-11 00:46:56,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:46:56,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:46:56,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:46:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:46:57,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:46:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:57,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:46:57,286 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:46:57,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:46:57,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:57,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:46:57,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:46:57,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:46:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:46:57,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692639429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:46:57,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:46:57,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:46:57,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891305274] [2022-02-11 00:46:57,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:46:57,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:46:57,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:46:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:46:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:46:57,363 INFO L87 Difference]: Start difference. First operand 2712 states and 6847 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:46:59,684 INFO L93 Difference]: Finished difference Result 4890 states and 12380 transitions. [2022-02-11 00:46:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 00:46:59,684 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:46:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:46:59,691 INFO L225 Difference]: With dead ends: 4890 [2022-02-11 00:46:59,691 INFO L226 Difference]: Without dead ends: 4871 [2022-02-11 00:46:59,692 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=738, Invalid=4962, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:46:59,692 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 441 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:46:59,692 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 253 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:46:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2022-02-11 00:46:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 2720. [2022-02-11 00:46:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 2719 states have (on average 2.526296432511953) internal successors, (6869), 2719 states have internal predecessors, (6869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 6869 transitions. [2022-02-11 00:46:59,731 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 6869 transitions. Word has length 30 [2022-02-11 00:46:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:46:59,731 INFO L470 AbstractCegarLoop]: Abstraction has 2720 states and 6869 transitions. [2022-02-11 00:46:59,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:46:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 6869 transitions. [2022-02-11 00:46:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:46:59,734 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:46:59,734 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:46:59,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-11 00:46:59,949 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,SelfDestructingSolverStorable168 [2022-02-11 00:46:59,950 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:46:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:46:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1404123906, now seen corresponding path program 36 times [2022-02-11 00:46:59,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:46:59,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945025631] [2022-02-11 00:46:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:46:59,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:46:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:00,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:00,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945025631] [2022-02-11 00:47:00,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945025631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:00,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020462520] [2022-02-11 00:47:00,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:47:00,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:00,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:00,189 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) [2022-02-11 00:47:00,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-11 00:47:00,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:47:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:00,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:00,503 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:47:00,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 48 [2022-02-11 00:47:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:00,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:00,776 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:00,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:00,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:00,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020462520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:00,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:00,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:47:00,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252837414] [2022-02-11 00:47:00,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:00,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:00,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:00,876 INFO L87 Difference]: Start difference. First operand 2720 states and 6869 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:03,286 INFO L93 Difference]: Finished difference Result 4653 states and 11794 transitions. [2022-02-11 00:47:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 00:47:03,286 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:03,292 INFO L225 Difference]: With dead ends: 4653 [2022-02-11 00:47:03,292 INFO L226 Difference]: Without dead ends: 4632 [2022-02-11 00:47:03,292 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=701, Invalid=4411, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:47:03,292 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 384 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:03,292 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 203 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:47:03,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2022-02-11 00:47:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 2722. [2022-02-11 00:47:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 2.525909592061742) internal successors, (6873), 2721 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 6873 transitions. [2022-02-11 00:47:03,327 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 6873 transitions. Word has length 30 [2022-02-11 00:47:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:03,327 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 6873 transitions. [2022-02-11 00:47:03,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 6873 transitions. [2022-02-11 00:47:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:03,330 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:03,330 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:03,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:03,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-11 00:47:03,546 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash -868679698, now seen corresponding path program 37 times [2022-02-11 00:47:03,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:03,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821048640] [2022-02-11 00:47:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:03,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:03,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821048640] [2022-02-11 00:47:03,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821048640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:03,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801046441] [2022-02-11 00:47:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:03,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:03,821 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) [2022-02-11 00:47:03,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-11 00:47:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:03,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:04,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:04,421 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:04,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:04,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:04,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:04,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:04,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801046441] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:04,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:04,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:47:04,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400441991] [2022-02-11 00:47:04,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:04,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:04,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:04,504 INFO L87 Difference]: Start difference. First operand 2722 states and 6873 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:06,348 INFO L93 Difference]: Finished difference Result 4552 states and 11507 transitions. [2022-02-11 00:47:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:47:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:06,356 INFO L225 Difference]: With dead ends: 4552 [2022-02-11 00:47:06,356 INFO L226 Difference]: Without dead ends: 4542 [2022-02-11 00:47:06,371 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=515, Invalid=3517, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:47:06,371 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 291 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:06,372 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 285 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:47:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-02-11 00:47:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 2719. [2022-02-11 00:47:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.526122148638705) internal successors, (6866), 2718 states have internal predecessors, (6866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 6866 transitions. [2022-02-11 00:47:06,422 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 6866 transitions. Word has length 30 [2022-02-11 00:47:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:06,422 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 6866 transitions. [2022-02-11 00:47:06,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 6866 transitions. [2022-02-11 00:47:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:06,425 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:06,425 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:06,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:06,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:06,630 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash -463933560, now seen corresponding path program 38 times [2022-02-11 00:47:06,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:06,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493367310] [2022-02-11 00:47:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:06,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:06,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493367310] [2022-02-11 00:47:06,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493367310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:06,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450640483] [2022-02-11 00:47:06,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:06,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:06,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:06,905 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) [2022-02-11 00:47:06,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-11 00:47:06,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:06,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:06,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:07,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:07,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:07,348 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:07,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:07,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:07,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:07,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:07,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:07,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450640483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:07,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:07,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:47:07,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730348458] [2022-02-11 00:47:07,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:07,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:07,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:07,405 INFO L87 Difference]: Start difference. First operand 2719 states and 6866 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:08,743 INFO L93 Difference]: Finished difference Result 4527 states and 11439 transitions. [2022-02-11 00:47:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:47:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:08,750 INFO L225 Difference]: With dead ends: 4527 [2022-02-11 00:47:08,750 INFO L226 Difference]: Without dead ends: 4517 [2022-02-11 00:47:08,750 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:47:08,750 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 304 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:08,751 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 294 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:47:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2022-02-11 00:47:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 2716. [2022-02-11 00:47:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 2.5263351749539593) internal successors, (6859), 2715 states have internal predecessors, (6859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 6859 transitions. [2022-02-11 00:47:08,786 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 6859 transitions. Word has length 30 [2022-02-11 00:47:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:08,787 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 6859 transitions. [2022-02-11 00:47:08,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 6859 transitions. [2022-02-11 00:47:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:08,789 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:08,789 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:08,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:09,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:09,005 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash 627544692, now seen corresponding path program 55 times [2022-02-11 00:47:09,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:09,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608041741] [2022-02-11 00:47:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:09,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:09,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608041741] [2022-02-11 00:47:09,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608041741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:09,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711104494] [2022-02-11 00:47:09,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:09,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:09,243 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) [2022-02-11 00:47:09,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-11 00:47:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:09,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:09,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:47:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:09,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:09,672 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:09,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:09,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:09,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:09,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:09,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711104494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:09,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:09,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:47:09,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145520964] [2022-02-11 00:47:09,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:09,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:09,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:09,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:09,759 INFO L87 Difference]: Start difference. First operand 2716 states and 6859 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:11,623 INFO L93 Difference]: Finished difference Result 4670 states and 11659 transitions. [2022-02-11 00:47:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:47:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:11,630 INFO L225 Difference]: With dead ends: 4670 [2022-02-11 00:47:11,631 INFO L226 Difference]: Without dead ends: 4631 [2022-02-11 00:47:11,631 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=431, Invalid=3601, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:47:11,631 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 368 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 2698 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:11,631 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 352 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:47:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2022-02-11 00:47:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2734. [2022-02-11 00:47:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.525795828759605) internal successors, (6903), 2733 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 6903 transitions. [2022-02-11 00:47:11,681 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 6903 transitions. Word has length 30 [2022-02-11 00:47:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:11,681 INFO L470 AbstractCegarLoop]: Abstraction has 2734 states and 6903 transitions. [2022-02-11 00:47:11,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 6903 transitions. [2022-02-11 00:47:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:11,685 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:11,685 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:11,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:11,901 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,SelfDestructingSolverStorable172 [2022-02-11 00:47:11,901 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1403316116, now seen corresponding path program 56 times [2022-02-11 00:47:11,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:11,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617536543] [2022-02-11 00:47:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:12,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:12,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617536543] [2022-02-11 00:47:12,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617536543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:12,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548828343] [2022-02-11 00:47:12,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:12,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:12,116 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) [2022-02-11 00:47:12,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-11 00:47:12,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:12,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:12,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:12,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:12,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:47:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:12,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:12,574 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:12,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:12,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:12,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:12,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:12,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548828343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:12,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:12,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:47:12,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847167786] [2022-02-11 00:47:12,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:12,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:12,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:12,700 INFO L87 Difference]: Start difference. First operand 2734 states and 6903 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:15,276 INFO L93 Difference]: Finished difference Result 5352 states and 13485 transitions. [2022-02-11 00:47:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:47:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:15,284 INFO L225 Difference]: With dead ends: 5352 [2022-02-11 00:47:15,284 INFO L226 Difference]: Without dead ends: 5339 [2022-02-11 00:47:15,285 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=928, Invalid=6554, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 00:47:15,285 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 408 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:15,285 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 267 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:47:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2022-02-11 00:47:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 2739. [2022-02-11 00:47:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 2.525566106647188) internal successors, (6915), 2738 states have internal predecessors, (6915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 6915 transitions. [2022-02-11 00:47:15,346 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 6915 transitions. Word has length 30 [2022-02-11 00:47:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:15,347 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 6915 transitions. [2022-02-11 00:47:15,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 6915 transitions. [2022-02-11 00:47:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:15,349 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:15,349 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:15,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:15,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:15,562 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2068519284, now seen corresponding path program 57 times [2022-02-11 00:47:15,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:15,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200352237] [2022-02-11 00:47:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:15,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:15,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200352237] [2022-02-11 00:47:15,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200352237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:15,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828860647] [2022-02-11 00:47:15,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:15,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:15,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:15,761 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) [2022-02-11 00:47:15,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-11 00:47:15,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:47:15,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:15,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:16,045 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:47:16,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 37 [2022-02-11 00:47:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:16,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:16,482 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:16,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:47:16,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:16,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:16,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828860647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:16,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:16,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:47:16,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524457321] [2022-02-11 00:47:16,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:16,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:16,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:16,589 INFO L87 Difference]: Start difference. First operand 2739 states and 6915 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:18,838 INFO L93 Difference]: Finished difference Result 4965 states and 12544 transitions. [2022-02-11 00:47:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:47:18,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:18,846 INFO L225 Difference]: With dead ends: 4965 [2022-02-11 00:47:18,846 INFO L226 Difference]: Without dead ends: 4938 [2022-02-11 00:47:18,846 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=564, Invalid=4128, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:47:18,846 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 411 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:18,846 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 285 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:47:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-02-11 00:47:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 2738. [2022-02-11 00:47:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2737 states have (on average 2.525392765801973) internal successors, (6912), 2737 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 6912 transitions. [2022-02-11 00:47:18,887 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 6912 transitions. Word has length 30 [2022-02-11 00:47:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:18,887 INFO L470 AbstractCegarLoop]: Abstraction has 2738 states and 6912 transitions. [2022-02-11 00:47:18,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 6912 transitions. [2022-02-11 00:47:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:18,890 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:18,890 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:18,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:19,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:19,106 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:19,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1228194702, now seen corresponding path program 58 times [2022-02-11 00:47:19,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:19,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462878177] [2022-02-11 00:47:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:19,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:19,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:19,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462878177] [2022-02-11 00:47:19,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462878177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:19,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368595962] [2022-02-11 00:47:19,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:47:19,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:19,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:19,386 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) [2022-02-11 00:47:19,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-11 00:47:19,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:47:19,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:19,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:19,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:47:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:19,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:19,999 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:19,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:20,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:20,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:20,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:20,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368595962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:20,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:20,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:47:20,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191958957] [2022-02-11 00:47:20,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:20,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:20,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:20,097 INFO L87 Difference]: Start difference. First operand 2738 states and 6912 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:21,689 INFO L93 Difference]: Finished difference Result 4487 states and 11228 transitions. [2022-02-11 00:47:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:47:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:21,696 INFO L225 Difference]: With dead ends: 4487 [2022-02-11 00:47:21,696 INFO L226 Difference]: Without dead ends: 4460 [2022-02-11 00:47:21,696 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=443, Invalid=3463, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:47:21,696 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 335 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:21,697 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 267 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:47:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-02-11 00:47:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 2723. [2022-02-11 00:47:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 2722 states have (on average 2.527185892725937) internal successors, (6879), 2722 states have internal predecessors, (6879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 6879 transitions. [2022-02-11 00:47:21,734 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 6879 transitions. Word has length 30 [2022-02-11 00:47:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:21,734 INFO L470 AbstractCegarLoop]: Abstraction has 2723 states and 6879 transitions. [2022-02-11 00:47:21,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 6879 transitions. [2022-02-11 00:47:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:21,737 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:21,737 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:21,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:21,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-02-11 00:47:21,947 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash -451058140, now seen corresponding path program 59 times [2022-02-11 00:47:21,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:21,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83029115] [2022-02-11 00:47:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:21,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:22,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:22,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83029115] [2022-02-11 00:47:22,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83029115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:22,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609603515] [2022-02-11 00:47:22,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:22,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:22,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:22,259 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) [2022-02-11 00:47:22,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-11 00:47:22,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:47:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:22,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:22,571 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:47:22,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-02-11 00:47:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:22,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:22,776 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:22,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:22,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:22,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:22,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:22,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609603515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:22,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:22,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:47:22,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130732073] [2022-02-11 00:47:22,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:22,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:47:22,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:47:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:47:22,862 INFO L87 Difference]: Start difference. First operand 2723 states and 6879 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:23,889 INFO L93 Difference]: Finished difference Result 4430 states and 11112 transitions. [2022-02-11 00:47:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:47:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:23,896 INFO L225 Difference]: With dead ends: 4430 [2022-02-11 00:47:23,896 INFO L226 Difference]: Without dead ends: 4421 [2022-02-11 00:47:23,896 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:47:23,896 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 350 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:23,896 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 346 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:47:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-02-11 00:47:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 2725. [2022-02-11 00:47:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 2.526431718061674) internal successors, (6882), 2724 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 6882 transitions. [2022-02-11 00:47:23,931 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 6882 transitions. Word has length 30 [2022-02-11 00:47:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:23,931 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 6882 transitions. [2022-02-11 00:47:23,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 6882 transitions. [2022-02-11 00:47:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:23,934 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:23,934 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:23,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:24,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:24,147 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1218938786, now seen corresponding path program 39 times [2022-02-11 00:47:24,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:24,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185928818] [2022-02-11 00:47:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:24,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:24,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185928818] [2022-02-11 00:47:24,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185928818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:24,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338867200] [2022-02-11 00:47:24,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:24,385 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) [2022-02-11 00:47:24,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-11 00:47:24,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:47:24,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:24,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:47:24,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:24,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:24,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-02-11 00:47:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:25,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:25,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:25,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:47:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:25,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338867200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:25,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:25,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-02-11 00:47:25,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904207603] [2022-02-11 00:47:25,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:25,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 00:47:25,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 00:47:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:47:25,593 INFO L87 Difference]: Start difference. First operand 2725 states and 6882 transitions. Second operand has 40 states, 40 states have (on average 1.875) 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) [2022-02-11 00:47:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:27,468 INFO L93 Difference]: Finished difference Result 5411 states and 13692 transitions. [2022-02-11 00:47:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:47:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) 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) Word has length 30 [2022-02-11 00:47:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:27,476 INFO L225 Difference]: With dead ends: 5411 [2022-02-11 00:47:27,477 INFO L226 Difference]: Without dead ends: 5380 [2022-02-11 00:47:27,477 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=983, Invalid=5337, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 00:47:27,477 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 233 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1015 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:27,477 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 251 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1176 Invalid, 0 Unknown, 1015 Unchecked, 0.4s Time] [2022-02-11 00:47:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-02-11 00:47:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 2744. [2022-02-11 00:47:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.5264309150565074) internal successors, (6930), 2743 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 6930 transitions. [2022-02-11 00:47:27,526 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 6930 transitions. Word has length 30 [2022-02-11 00:47:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:27,526 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 6930 transitions. [2022-02-11 00:47:27,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) 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) [2022-02-11 00:47:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 6930 transitions. [2022-02-11 00:47:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:27,530 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:27,530 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:27,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:27,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:27,740 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash 598451650, now seen corresponding path program 40 times [2022-02-11 00:47:27,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:27,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050461619] [2022-02-11 00:47:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:27,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:28,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:28,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050461619] [2022-02-11 00:47:28,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050461619] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:28,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965628867] [2022-02-11 00:47:28,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:47:28,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:28,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:28,077 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) [2022-02-11 00:47:28,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-11 00:47:28,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:47:28,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:28,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:28,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:28,429 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:47:28,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 48 [2022-02-11 00:47:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:28,747 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:28,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:28,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:28,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:28,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:28,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:47:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:28,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965628867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:28,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:28,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:47:28,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027000993] [2022-02-11 00:47:28,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:28,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:47:28,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:47:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:47:28,847 INFO L87 Difference]: Start difference. First operand 2744 states and 6930 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:32,516 INFO L93 Difference]: Finished difference Result 5511 states and 13878 transitions. [2022-02-11 00:47:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 00:47:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:32,525 INFO L225 Difference]: With dead ends: 5511 [2022-02-11 00:47:32,525 INFO L226 Difference]: Without dead ends: 5480 [2022-02-11 00:47:32,526 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1122, Invalid=8190, Unknown=0, NotChecked=0, Total=9312 [2022-02-11 00:47:32,526 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 440 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:32,526 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 283 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 00:47:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-02-11 00:47:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 2774. [2022-02-11 00:47:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.5279480706815725) internal successors, (7010), 2773 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) [2022-02-11 00:47:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 7010 transitions. [2022-02-11 00:47:32,571 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 7010 transitions. Word has length 30 [2022-02-11 00:47:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:32,571 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 7010 transitions. [2022-02-11 00:47:32,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 7010 transitions. [2022-02-11 00:47:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:32,574 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:32,574 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:32,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-02-11 00:47:32,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:32,791 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1263654818, now seen corresponding path program 41 times [2022-02-11 00:47:32,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:32,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438555428] [2022-02-11 00:47:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:32,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:33,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:33,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438555428] [2022-02-11 00:47:33,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438555428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:33,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644472873] [2022-02-11 00:47:33,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:33,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:33,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:33,093 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) [2022-02-11 00:47:33,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-11 00:47:33,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:47:33,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:33,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:33,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:33,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:33,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:33,724 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:33,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:33,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:33,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:33,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:33,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644472873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:33,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:33,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:47:33,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792304429] [2022-02-11 00:47:33,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:33,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:47:33,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:47:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:47:33,820 INFO L87 Difference]: Start difference. First operand 2774 states and 7010 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:36,352 INFO L93 Difference]: Finished difference Result 4774 states and 12066 transitions. [2022-02-11 00:47:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:47:36,352 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:36,359 INFO L225 Difference]: With dead ends: 4774 [2022-02-11 00:47:36,359 INFO L226 Difference]: Without dead ends: 4750 [2022-02-11 00:47:36,359 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=626, Invalid=4924, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:47:36,359 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 321 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:36,359 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 190 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:47:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2022-02-11 00:47:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 2774. [2022-02-11 00:47:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.5268662098809953) internal successors, (7007), 2773 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 7007 transitions. [2022-02-11 00:47:36,397 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 7007 transitions. Word has length 30 [2022-02-11 00:47:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:36,397 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 7007 transitions. [2022-02-11 00:47:36,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 7007 transitions. [2022-02-11 00:47:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:36,400 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:36,400 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:36,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:36,616 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,SelfDestructingSolverStorable179 [2022-02-11 00:47:36,616 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1685984356, now seen corresponding path program 42 times [2022-02-11 00:47:36,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:36,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630758659] [2022-02-11 00:47:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:36,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:36,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:36,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630758659] [2022-02-11 00:47:36,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630758659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:36,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476059362] [2022-02-11 00:47:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:47:36,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:36,943 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) [2022-02-11 00:47:36,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-11 00:47:36,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:47:36,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:36,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:47:36,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:37,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:37,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:37,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:47:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:37,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:37,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:37,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:37,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:47:37,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:47:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:38,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476059362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:38,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:38,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-11 00:47:38,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117190066] [2022-02-11 00:47:38,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:38,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 00:47:38,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 00:47:38,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 00:47:38,154 INFO L87 Difference]: Start difference. First operand 2774 states and 7007 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:39,094 INFO L93 Difference]: Finished difference Result 3682 states and 9259 transitions. [2022-02-11 00:47:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:47:39,095 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:39,100 INFO L225 Difference]: With dead ends: 3682 [2022-02-11 00:47:39,100 INFO L226 Difference]: Without dead ends: 3671 [2022-02-11 00:47:39,101 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=2060, Unknown=0, NotChecked=0, Total=2450 [2022-02-11 00:47:39,101 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 247 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 883 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:39,101 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 140 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 734 Invalid, 0 Unknown, 883 Unchecked, 0.4s Time] [2022-02-11 00:47:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2022-02-11 00:47:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2786. [2022-02-11 00:47:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2785 states have (on average 2.526391382405745) internal successors, (7036), 2785 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 7036 transitions. [2022-02-11 00:47:39,138 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 7036 transitions. Word has length 30 [2022-02-11 00:47:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:39,138 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 7036 transitions. [2022-02-11 00:47:39,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 7036 transitions. [2022-02-11 00:47:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:39,141 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:39,141 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:39,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:39,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:39,358 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash -852581890, now seen corresponding path program 43 times [2022-02-11 00:47:39,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:39,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515357982] [2022-02-11 00:47:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:39,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:39,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:39,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515357982] [2022-02-11 00:47:39,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515357982] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:39,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673673780] [2022-02-11 00:47:39,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:39,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:39,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:39,563 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) [2022-02-11 00:47:39,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-11 00:47:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:39,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:39,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:39,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:40,204 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:40,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:40,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:40,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:40,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:40,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673673780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:40,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:40,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:47:40,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165309749] [2022-02-11 00:47:40,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:40,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:40,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:40,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:40,279 INFO L87 Difference]: Start difference. First operand 2786 states and 7036 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:41,731 INFO L93 Difference]: Finished difference Result 4597 states and 11655 transitions. [2022-02-11 00:47:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:47:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:41,738 INFO L225 Difference]: With dead ends: 4597 [2022-02-11 00:47:41,738 INFO L226 Difference]: Without dead ends: 4583 [2022-02-11 00:47:41,738 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:47:41,738 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 303 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:41,738 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 174 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:47:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2022-02-11 00:47:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 2793. [2022-02-11 00:47:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 2.525787965616046) internal successors, (7052), 2792 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 7052 transitions. [2022-02-11 00:47:41,777 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 7052 transitions. Word has length 30 [2022-02-11 00:47:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:41,777 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 7052 transitions. [2022-02-11 00:47:41,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 7052 transitions. [2022-02-11 00:47:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:41,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:41,780 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:41,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:41,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:41,987 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash -317137682, now seen corresponding path program 44 times [2022-02-11 00:47:41,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:41,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185640140] [2022-02-11 00:47:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:41,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:42,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:42,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185640140] [2022-02-11 00:47:42,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185640140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:42,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099096095] [2022-02-11 00:47:42,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:42,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:42,283 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) [2022-02-11 00:47:42,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-11 00:47:42,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:42,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:42,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:42,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:42,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:42,984 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:42,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:43,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:43,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:43,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:43,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099096095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:43,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:43,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:47:43,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593127906] [2022-02-11 00:47:43,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:43,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:47:43,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:47:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:47:43,058 INFO L87 Difference]: Start difference. First operand 2793 states and 7052 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:44,502 INFO L93 Difference]: Finished difference Result 4632 states and 11704 transitions. [2022-02-11 00:47:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:47:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:44,509 INFO L225 Difference]: With dead ends: 4632 [2022-02-11 00:47:44,509 INFO L226 Difference]: Without dead ends: 4622 [2022-02-11 00:47:44,510 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=375, Invalid=3165, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 00:47:44,510 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 244 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:44,510 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 256 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2716 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:47:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4622 states. [2022-02-11 00:47:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4622 to 2792. [2022-02-11 00:47:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.525976352561806) internal successors, (7050), 2791 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 7050 transitions. [2022-02-11 00:47:44,598 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 7050 transitions. Word has length 30 [2022-02-11 00:47:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:44,598 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 7050 transitions. [2022-02-11 00:47:44,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 7050 transitions. [2022-02-11 00:47:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:44,601 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:44,601 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:44,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:44,815 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,SelfDestructingSolverStorable182 [2022-02-11 00:47:44,815 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1994859392, now seen corresponding path program 45 times [2022-02-11 00:47:44,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:44,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015269804] [2022-02-11 00:47:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:45,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:45,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015269804] [2022-02-11 00:47:45,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015269804] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:45,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052744196] [2022-02-11 00:47:45,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:47:45,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:45,096 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) [2022-02-11 00:47:45,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-11 00:47:45,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:47:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:45,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:45,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:45,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:45,639 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:45,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:45,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:45,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:45,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:47:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:45,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052744196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:45,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:45,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:47:45,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077913946] [2022-02-11 00:47:45,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:45,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:47:45,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:47:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:47:45,704 INFO L87 Difference]: Start difference. First operand 2792 states and 7050 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:48,157 INFO L93 Difference]: Finished difference Result 5831 states and 14848 transitions. [2022-02-11 00:47:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:47:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:48,166 INFO L225 Difference]: With dead ends: 5831 [2022-02-11 00:47:48,166 INFO L226 Difference]: Without dead ends: 5804 [2022-02-11 00:47:48,167 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=838, Invalid=5968, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 00:47:48,167 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 389 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:48,168 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 249 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:47:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2022-02-11 00:47:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 2788. [2022-02-11 00:47:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.5260136347326876) internal successors, (7040), 2787 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7040 transitions. [2022-02-11 00:47:48,218 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7040 transitions. Word has length 30 [2022-02-11 00:47:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:48,218 INFO L470 AbstractCegarLoop]: Abstraction has 2788 states and 7040 transitions. [2022-02-11 00:47:48,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7040 transitions. [2022-02-11 00:47:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:48,221 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:48,221 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:48,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:48,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:48,435 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:48,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1892064022, now seen corresponding path program 46 times [2022-02-11 00:47:48,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:48,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629890353] [2022-02-11 00:47:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:48,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:48,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629890353] [2022-02-11 00:47:48,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629890353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:48,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452903583] [2022-02-11 00:47:48,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:47:48,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:48,744 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) [2022-02-11 00:47:48,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-11 00:47:48,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:47:48,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:48,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:49,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:47:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:49,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:49,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:49,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:49,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:47:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:49,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452903583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:49,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:49,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:47:49,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560395987] [2022-02-11 00:47:49,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:49,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:47:49,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:47:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:47:49,293 INFO L87 Difference]: Start difference. First operand 2788 states and 7040 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:51,067 INFO L93 Difference]: Finished difference Result 4640 states and 11634 transitions. [2022-02-11 00:47:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:47:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:51,073 INFO L225 Difference]: With dead ends: 4640 [2022-02-11 00:47:51,073 INFO L226 Difference]: Without dead ends: 4609 [2022-02-11 00:47:51,073 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=548, Invalid=4422, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:47:51,073 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 413 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 3126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:51,073 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 313 Invalid, 3126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:47:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4609 states. [2022-02-11 00:47:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4609 to 2757. [2022-02-11 00:47:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-11 00:47:51,106 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-11 00:47:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:51,106 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-11 00:47:51,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-11 00:47:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:51,108 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:51,108 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:51,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-11 00:47:51,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:51,323 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash 919510156, now seen corresponding path program 47 times [2022-02-11 00:47:51,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:51,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107024005] [2022-02-11 00:47:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:51,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:51,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107024005] [2022-02-11 00:47:51,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107024005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:51,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872306753] [2022-02-11 00:47:51,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:47:51,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:51,582 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) [2022-02-11 00:47:51,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-11 00:47:51,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:47:51,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:51,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:51,854 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:47:51,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2022-02-11 00:47:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:52,065 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:52,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:52,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:52,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:52,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:52,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:47:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:52,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872306753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:52,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:52,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:47:52,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811525653] [2022-02-11 00:47:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:52,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:47:52,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:47:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:47:52,133 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:53,826 INFO L93 Difference]: Finished difference Result 4898 states and 12232 transitions. [2022-02-11 00:47:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:47:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:53,833 INFO L225 Difference]: With dead ends: 4898 [2022-02-11 00:47:53,833 INFO L226 Difference]: Without dead ends: 4869 [2022-02-11 00:47:53,834 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=473, Invalid=3817, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 00:47:53,834 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 359 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:53,834 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 353 Invalid, 2752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:47:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2022-02-11 00:47:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 2775. [2022-02-11 00:47:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 2.526315789473684) internal successors, (7008), 2774 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 7008 transitions. [2022-02-11 00:47:53,875 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 7008 transitions. Word has length 30 [2022-02-11 00:47:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:53,875 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 7008 transitions. [2022-02-11 00:47:53,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 7008 transitions. [2022-02-11 00:47:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:53,878 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:53,878 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:53,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-02-11 00:47:54,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:54,085 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1193181894, now seen corresponding path program 48 times [2022-02-11 00:47:54,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:54,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642224473] [2022-02-11 00:47:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:54,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:54,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:54,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642224473] [2022-02-11 00:47:54,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642224473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:54,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710454220] [2022-02-11 00:47:54,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:47:54,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:54,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:54,394 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) [2022-02-11 00:47:54,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-11 00:47:54,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:47:54,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:54,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:54,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:54,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:54,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:54,856 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:54,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:54,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:54,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:54,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:47:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:54,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710454220] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:54,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:54,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:47:54,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655368643] [2022-02-11 00:47:54,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:54,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:47:54,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:47:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:47:54,922 INFO L87 Difference]: Start difference. First operand 2775 states and 7008 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:56,673 INFO L93 Difference]: Finished difference Result 5569 states and 14038 transitions. [2022-02-11 00:47:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:47:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:56,681 INFO L225 Difference]: With dead ends: 5569 [2022-02-11 00:47:56,681 INFO L226 Difference]: Without dead ends: 5550 [2022-02-11 00:47:56,682 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=762, Invalid=5244, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 00:47:56,682 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 442 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:56,682 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 231 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:47:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2022-02-11 00:47:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 2757. [2022-02-11 00:47:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-11 00:47:56,733 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-11 00:47:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:56,733 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-11 00:47:56,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-11 00:47:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:56,736 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:56,736 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:56,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-11 00:47:56,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:56,951 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1858385062, now seen corresponding path program 49 times [2022-02-11 00:47:56,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:56,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407479224] [2022-02-11 00:47:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:57,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:57,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407479224] [2022-02-11 00:47:57,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407479224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:57,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874708384] [2022-02-11 00:47:57,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:47:57,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:57,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:57,148 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) [2022-02-11 00:47:57,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-11 00:47:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:57,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:47:57,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:47:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:57,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:47:57,772 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:47:57,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:47:57,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:57,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:47:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:47:57,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:47:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:57,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874708384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:47:57,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:47:57,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:47:57,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438501532] [2022-02-11 00:47:57,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:47:57,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:47:57,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:47:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:47:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:47:57,861 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:47:59,393 INFO L93 Difference]: Finished difference Result 4903 states and 12395 transitions. [2022-02-11 00:47:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:47:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:47:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:47:59,400 INFO L225 Difference]: With dead ends: 4903 [2022-02-11 00:47:59,400 INFO L226 Difference]: Without dead ends: 4880 [2022-02-11 00:47:59,401 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=488, Invalid=3672, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:47:59,401 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 317 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:47:59,401 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 217 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:47:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2022-02-11 00:47:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 2760. [2022-02-11 00:47:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.5255527364987316) internal successors, (6968), 2759 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6968 transitions. [2022-02-11 00:47:59,441 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6968 transitions. Word has length 30 [2022-02-11 00:47:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:47:59,442 INFO L470 AbstractCegarLoop]: Abstraction has 2760 states and 6968 transitions. [2022-02-11 00:47:59,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:47:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6968 transitions. [2022-02-11 00:47:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:47:59,444 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:47:59,444 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:47:59,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-02-11 00:47:59,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:59,652 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:47:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:47:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash 607621852, now seen corresponding path program 50 times [2022-02-11 00:47:59,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:47:59,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438074742] [2022-02-11 00:47:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:47:59,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:47:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:47:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:47:59,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:47:59,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438074742] [2022-02-11 00:47:59,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438074742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:47:59,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086887538] [2022-02-11 00:47:59,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:47:59,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:47:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:47:59,871 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) [2022-02-11 00:47:59,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-11 00:47:59,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:47:59,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:47:59,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:47:59,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:00,134 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:48:00,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 45 [2022-02-11 00:48:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:00,355 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:00,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:00,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:00,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:48:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:00,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086887538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:00,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:00,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:00,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383660168] [2022-02-11 00:48:00,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:00,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:00,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:00,423 INFO L87 Difference]: Start difference. First operand 2760 states and 6968 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:01,742 INFO L93 Difference]: Finished difference Result 4661 states and 11697 transitions. [2022-02-11 00:48:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:48:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:01,749 INFO L225 Difference]: With dead ends: 4661 [2022-02-11 00:48:01,749 INFO L226 Difference]: Without dead ends: 4650 [2022-02-11 00:48:01,750 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=3045, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:48:01,750 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 294 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:01,750 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 368 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:48:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2022-02-11 00:48:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 2757. [2022-02-11 00:48:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-11 00:48:01,788 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-11 00:48:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:01,788 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-11 00:48:01,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-11 00:48:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:01,791 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:01,791 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:01,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:02,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-02-11 00:48:02,006 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1532961490, now seen corresponding path program 60 times [2022-02-11 00:48:02,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:02,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027827115] [2022-02-11 00:48:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:02,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:02,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:02,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027827115] [2022-02-11 00:48:02,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027827115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:02,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839998604] [2022-02-11 00:48:02,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:48:02,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:02,200 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) [2022-02-11 00:48:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-11 00:48:02,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:48:02,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:02,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:02,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:48:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:02,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:02,677 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:02,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:02,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:02,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:02,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839998604] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:02,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:02,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:02,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906989102] [2022-02-11 00:48:02,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:02,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:02,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:02,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:02,774 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:04,211 INFO L93 Difference]: Finished difference Result 4669 states and 11728 transitions. [2022-02-11 00:48:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:48:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:04,217 INFO L225 Difference]: With dead ends: 4669 [2022-02-11 00:48:04,218 INFO L226 Difference]: Without dead ends: 4660 [2022-02-11 00:48:04,218 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:48:04,218 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 406 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 2419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:04,218 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 317 Invalid, 2419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:48:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2022-02-11 00:48:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 2757. [2022-02-11 00:48:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-11 00:48:04,257 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-11 00:48:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:04,257 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-11 00:48:04,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-11 00:48:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:04,260 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:04,260 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:04,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:04,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-11 00:48:04,475 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1924582932, now seen corresponding path program 61 times [2022-02-11 00:48:04,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:04,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261773174] [2022-02-11 00:48:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:04,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:04,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:04,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261773174] [2022-02-11 00:48:04,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261773174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:04,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690936876] [2022-02-11 00:48:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:48:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:04,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:04,759 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) [2022-02-11 00:48:04,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-11 00:48:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:04,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:04,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:05,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:48:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:05,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:05,458 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:05,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:05,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:05,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:05,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:05,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690936876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:05,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:05,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:05,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773779381] [2022-02-11 00:48:05,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:05,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:05,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:05,575 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:07,267 INFO L93 Difference]: Finished difference Result 4779 states and 11972 transitions. [2022-02-11 00:48:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:48:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:07,274 INFO L225 Difference]: With dead ends: 4779 [2022-02-11 00:48:07,274 INFO L226 Difference]: Without dead ends: 4754 [2022-02-11 00:48:07,275 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:48:07,275 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 384 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:07,287 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 364 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:48:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2022-02-11 00:48:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 2775. [2022-02-11 00:48:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 2.525234318673396) internal successors, (7005), 2774 states have internal predecessors, (7005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 7005 transitions. [2022-02-11 00:48:07,358 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 7005 transitions. Word has length 30 [2022-02-11 00:48:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:07,359 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 7005 transitions. [2022-02-11 00:48:07,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 7005 transitions. [2022-02-11 00:48:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:07,361 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:07,361 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:07,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-02-11 00:48:07,577 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,SelfDestructingSolverStorable190 [2022-02-11 00:48:07,577 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1821367144, now seen corresponding path program 62 times [2022-02-11 00:48:07,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:07,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80637340] [2022-02-11 00:48:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:07,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:07,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:07,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80637340] [2022-02-11 00:48:07,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80637340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:07,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535221326] [2022-02-11 00:48:07,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:07,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:07,869 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) [2022-02-11 00:48:07,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-11 00:48:07,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:07,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:07,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:08,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:48:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:08,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:08,486 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:08,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:08,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:08,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:08,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:08,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:08,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535221326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:08,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:08,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:08,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668191784] [2022-02-11 00:48:08,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:08,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:08,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:08,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:08,571 INFO L87 Difference]: Start difference. First operand 2775 states and 7005 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:10,258 INFO L93 Difference]: Finished difference Result 5311 states and 13373 transitions. [2022-02-11 00:48:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:48:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:10,266 INFO L225 Difference]: With dead ends: 5311 [2022-02-11 00:48:10,266 INFO L226 Difference]: Without dead ends: 5298 [2022-02-11 00:48:10,267 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:48:10,267 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 376 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:10,267 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 226 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:48:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2022-02-11 00:48:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 2780. [2022-02-11 00:48:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 2.5250089960417417) internal successors, (7017), 2779 states have internal predecessors, (7017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 7017 transitions. [2022-02-11 00:48:10,311 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 7017 transitions. Word has length 30 [2022-02-11 00:48:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:10,311 INFO L470 AbstractCegarLoop]: Abstraction has 2780 states and 7017 transitions. [2022-02-11 00:48:10,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 7017 transitions. [2022-02-11 00:48:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:10,314 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:10,314 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:10,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:10,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:10,530 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1808396984, now seen corresponding path program 63 times [2022-02-11 00:48:10,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:10,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215987474] [2022-02-11 00:48:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:10,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:10,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:10,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215987474] [2022-02-11 00:48:10,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215987474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:10,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798967352] [2022-02-11 00:48:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:10,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:10,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:10,792 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) [2022-02-11 00:48:10,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-11 00:48:10,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:48:10,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:10,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:11,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:48:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:11,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:11,246 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:11,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:48:11,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:11,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:11,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:11,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798967352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:11,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:11,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:11,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978424806] [2022-02-11 00:48:11,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:11,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:11,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:11,317 INFO L87 Difference]: Start difference. First operand 2780 states and 7017 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:12,476 INFO L93 Difference]: Finished difference Result 4559 states and 11490 transitions. [2022-02-11 00:48:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 00:48:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:12,482 INFO L225 Difference]: With dead ends: 4559 [2022-02-11 00:48:12,482 INFO L226 Difference]: Without dead ends: 4542 [2022-02-11 00:48:12,482 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=342, Invalid=2208, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 00:48:12,482 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 354 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:12,482 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 305 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:48:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-02-11 00:48:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 2779. [2022-02-11 00:48:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 2.524838012958963) internal successors, (7014), 2778 states have internal predecessors, (7014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 7014 transitions. [2022-02-11 00:48:12,519 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 7014 transitions. Word has length 30 [2022-02-11 00:48:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:12,519 INFO L470 AbstractCegarLoop]: Abstraction has 2779 states and 7014 transitions. [2022-02-11 00:48:12,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 7014 transitions. [2022-02-11 00:48:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:12,522 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:12,522 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:12,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:12,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:12,727 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash -810143674, now seen corresponding path program 64 times [2022-02-11 00:48:12,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:12,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363332251] [2022-02-11 00:48:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:12,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:12,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363332251] [2022-02-11 00:48:12,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363332251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:12,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393280252] [2022-02-11 00:48:12,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:12,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:12,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:12,944 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) [2022-02-11 00:48:12,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-11 00:48:12,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:12,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:12,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:13,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-02-11 00:48:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:13,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:13,504 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:13,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:13,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:13,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:13,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393280252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:13,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:13,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:13,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658097399] [2022-02-11 00:48:13,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:13,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:13,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:13,657 INFO L87 Difference]: Start difference. First operand 2779 states and 7014 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:14,937 INFO L93 Difference]: Finished difference Result 4720 states and 11828 transitions. [2022-02-11 00:48:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 00:48:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:14,944 INFO L225 Difference]: With dead ends: 4720 [2022-02-11 00:48:14,944 INFO L226 Difference]: Without dead ends: 4701 [2022-02-11 00:48:14,944 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=394, Invalid=2362, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:48:14,944 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 389 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:14,944 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 276 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:48:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2022-02-11 00:48:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 2760. [2022-02-11 00:48:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.5255527364987316) internal successors, (6968), 2759 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6968 transitions. [2022-02-11 00:48:14,987 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6968 transitions. Word has length 30 [2022-02-11 00:48:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:14,987 INFO L470 AbstractCegarLoop]: Abstraction has 2760 states and 6968 transitions. [2022-02-11 00:48:14,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6968 transitions. [2022-02-11 00:48:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:14,990 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:14,990 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:15,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:15,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:15,206 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1564145080, now seen corresponding path program 65 times [2022-02-11 00:48:15,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:15,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248463646] [2022-02-11 00:48:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:15,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:15,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248463646] [2022-02-11 00:48:15,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248463646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:15,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487842848] [2022-02-11 00:48:15,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:48:15,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:15,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:15,450 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) [2022-02-11 00:48:15,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-11 00:48:15,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:48:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:15,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:15,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:15,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:48:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:15,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:15,923 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:15,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:15,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:15,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:15,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:15,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487842848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:15,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:15,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:15,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097764494] [2022-02-11 00:48:15,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:15,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:15,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:15,999 INFO L87 Difference]: Start difference. First operand 2760 states and 6968 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:17,247 INFO L93 Difference]: Finished difference Result 4637 states and 11651 transitions. [2022-02-11 00:48:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-11 00:48:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:17,254 INFO L225 Difference]: With dead ends: 4637 [2022-02-11 00:48:17,254 INFO L226 Difference]: Without dead ends: 4628 [2022-02-11 00:48:17,254 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 00:48:17,254 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 342 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 2962 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:17,254 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 410 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2962 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:48:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2022-02-11 00:48:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 2757. [2022-02-11 00:48:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2756 states have (on average 2.5257619738751815) internal successors, (6961), 2756 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 6961 transitions. [2022-02-11 00:48:17,306 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 6961 transitions. Word has length 30 [2022-02-11 00:48:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:17,307 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 6961 transitions. [2022-02-11 00:48:17,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 6961 transitions. [2022-02-11 00:48:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:17,309 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:17,309 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:17,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-02-11 00:48:17,525 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,SelfDestructingSolverStorable194 [2022-02-11 00:48:17,525 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1713384816, now seen corresponding path program 66 times [2022-02-11 00:48:17,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:17,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126522382] [2022-02-11 00:48:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:17,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:17,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126522382] [2022-02-11 00:48:17,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126522382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:17,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374563718] [2022-02-11 00:48:17,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:48:17,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:17,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:17,805 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) [2022-02-11 00:48:17,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-11 00:48:17,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:48:17,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:17,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:48:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:18,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:18,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:18,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-02-11 00:48:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:18,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:18,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:18,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-11 00:48:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:18,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374563718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:18,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:18,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-02-11 00:48:18,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931239230] [2022-02-11 00:48:18,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:18,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:48:18,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:48:18,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:48:18,718 INFO L87 Difference]: Start difference. First operand 2757 states and 6961 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:24,564 INFO L93 Difference]: Finished difference Result 5140 states and 12873 transitions. [2022-02-11 00:48:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-11 00:48:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:24,571 INFO L225 Difference]: With dead ends: 5140 [2022-02-11 00:48:24,571 INFO L226 Difference]: Without dead ends: 5095 [2022-02-11 00:48:24,572 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 40 SyntacticMatches, 18 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2311, Invalid=9899, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 00:48:24,572 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 649 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1908 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:24,572 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 278 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1263 Invalid, 0 Unknown, 1908 Unchecked, 0.6s Time] [2022-02-11 00:48:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2022-02-11 00:48:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 2832. [2022-02-11 00:48:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.5305545743553512) internal successors, (7164), 2831 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 7164 transitions. [2022-02-11 00:48:24,609 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 7164 transitions. Word has length 30 [2022-02-11 00:48:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:24,609 INFO L470 AbstractCegarLoop]: Abstraction has 2832 states and 7164 transitions. [2022-02-11 00:48:24,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 7164 transitions. [2022-02-11 00:48:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:24,612 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:24,612 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:24,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:24,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:24,819 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:24,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:24,820 INFO L85 PathProgramCache]: Analyzing trace with hash -937613392, now seen corresponding path program 67 times [2022-02-11 00:48:24,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:24,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225490666] [2022-02-11 00:48:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:24,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:25,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:25,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225490666] [2022-02-11 00:48:25,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225490666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:25,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833901150] [2022-02-11 00:48:25,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:48:25,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:25,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:25,109 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) [2022-02-11 00:48:25,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-11 00:48:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:25,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:25,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:25,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:48:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:25,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:25,787 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:25,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:25,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:25,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:25,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:25,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833901150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:25,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:25,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:25,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101856529] [2022-02-11 00:48:25,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:25,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:25,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:25,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:25,905 INFO L87 Difference]: Start difference. First operand 2832 states and 7164 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:29,193 INFO L93 Difference]: Finished difference Result 5490 states and 13824 transitions. [2022-02-11 00:48:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 00:48:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:29,201 INFO L225 Difference]: With dead ends: 5490 [2022-02-11 00:48:29,201 INFO L226 Difference]: Without dead ends: 5475 [2022-02-11 00:48:29,202 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1080, Invalid=6752, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 00:48:29,202 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 581 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:29,202 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 179 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:48:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-02-11 00:48:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 2847. [2022-02-11 00:48:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.530217849613493) internal successors, (7201), 2846 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7201 transitions. [2022-02-11 00:48:29,254 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7201 transitions. Word has length 30 [2022-02-11 00:48:29,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:29,254 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7201 transitions. [2022-02-11 00:48:29,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7201 transitions. [2022-02-11 00:48:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:29,257 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:29,257 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:29,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-02-11 00:48:29,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:29,472 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash -272410224, now seen corresponding path program 68 times [2022-02-11 00:48:29,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:29,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820067008] [2022-02-11 00:48:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:29,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:29,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:29,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820067008] [2022-02-11 00:48:29,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820067008] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:29,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508509963] [2022-02-11 00:48:29,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:29,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:29,767 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) [2022-02-11 00:48:29,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-11 00:48:29,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:29,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:29,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:30,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:48:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:30,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:30,336 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:30,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:48:30,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:30,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:30,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508509963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:30,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:30,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:30,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453438807] [2022-02-11 00:48:30,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:30,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:30,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:30,441 INFO L87 Difference]: Start difference. First operand 2847 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:32,694 INFO L93 Difference]: Finished difference Result 4750 states and 11976 transitions. [2022-02-11 00:48:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:48:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:32,701 INFO L225 Difference]: With dead ends: 4750 [2022-02-11 00:48:32,701 INFO L226 Difference]: Without dead ends: 4731 [2022-02-11 00:48:32,702 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=574, Invalid=3586, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:48:32,702 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 466 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:32,702 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 234 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:48:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2022-02-11 00:48:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 2847. [2022-02-11 00:48:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.52986647926915) internal successors, (7200), 2846 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7200 transitions. [2022-02-11 00:48:32,749 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7200 transitions. Word has length 30 [2022-02-11 00:48:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:32,749 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7200 transitions. [2022-02-11 00:48:32,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7200 transitions. [2022-02-11 00:48:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:32,752 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:32,752 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:32,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-02-11 00:48:32,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:32,967 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:32,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash 725843086, now seen corresponding path program 69 times [2022-02-11 00:48:32,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:32,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490932878] [2022-02-11 00:48:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:33,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:33,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490932878] [2022-02-11 00:48:33,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490932878] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:33,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470954719] [2022-02-11 00:48:33,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:33,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:33,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:33,287 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) [2022-02-11 00:48:33,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-11 00:48:33,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:48:33,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:33,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:33,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:33,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 00:48:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:33,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:33,854 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:33,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:33,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:33,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:33,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:33,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470954719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:33,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:33,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:33,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162951033] [2022-02-11 00:48:33,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:33,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:33,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:33,935 INFO L87 Difference]: Start difference. First operand 2847 states and 7200 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:35,643 INFO L93 Difference]: Finished difference Result 4704 states and 11815 transitions. [2022-02-11 00:48:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:48:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:35,650 INFO L225 Difference]: With dead ends: 4704 [2022-02-11 00:48:35,650 INFO L226 Difference]: Without dead ends: 4677 [2022-02-11 00:48:35,651 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=534, Invalid=3626, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:48:35,651 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 444 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:35,651 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 244 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2664 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:48:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4677 states. [2022-02-11 00:48:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4677 to 2835. [2022-02-11 00:48:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2834 states have (on average 2.5303458009880027) internal successors, (7171), 2834 states have internal predecessors, (7171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 7171 transitions. [2022-02-11 00:48:35,690 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 7171 transitions. Word has length 30 [2022-02-11 00:48:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:35,690 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 7171 transitions. [2022-02-11 00:48:35,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 7171 transitions. [2022-02-11 00:48:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:35,693 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:35,693 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:35,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:35,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:35,909 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash 335737166, now seen corresponding path program 70 times [2022-02-11 00:48:35,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:35,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049260759] [2022-02-11 00:48:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:36,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:36,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049260759] [2022-02-11 00:48:36,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049260759] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:36,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929448881] [2022-02-11 00:48:36,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:36,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:36,134 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) [2022-02-11 00:48:36,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-11 00:48:36,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:36,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:36,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:36,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:48:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:36,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:36,558 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:36,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:36,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:36,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:36,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:36,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929448881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:36,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:36,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:48:36,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787987915] [2022-02-11 00:48:36,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:36,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:48:36,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:48:36,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:48:36,626 INFO L87 Difference]: Start difference. First operand 2835 states and 7171 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:39,019 INFO L93 Difference]: Finished difference Result 5864 states and 14895 transitions. [2022-02-11 00:48:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 00:48:39,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:39,028 INFO L225 Difference]: With dead ends: 5864 [2022-02-11 00:48:39,028 INFO L226 Difference]: Without dead ends: 5851 [2022-02-11 00:48:39,028 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=887, Invalid=6423, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:48:39,028 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 400 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:39,028 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 238 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:48:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2022-02-11 00:48:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 2871. [2022-02-11 00:48:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 2.5310104529616724) internal successors, (7264), 2870 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 7264 transitions. [2022-02-11 00:48:39,075 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 7264 transitions. Word has length 30 [2022-02-11 00:48:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:39,075 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 7264 transitions. [2022-02-11 00:48:39,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 7264 transitions. [2022-02-11 00:48:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:39,078 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:39,078 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:39,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-02-11 00:48:39,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-11 00:48:39,293 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2092138216, now seen corresponding path program 71 times [2022-02-11 00:48:39,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:39,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026065488] [2022-02-11 00:48:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:39,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:39,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026065488] [2022-02-11 00:48:39,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026065488] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:39,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918524815] [2022-02-11 00:48:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:48:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:39,488 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) [2022-02-11 00:48:39,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-11 00:48:39,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:48:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:39,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:39,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:39,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:48:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:39,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:39,914 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:39,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:48:39,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:39,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:39,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:39,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918524815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:39,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:39,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-11 00:48:39,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450911913] [2022-02-11 00:48:39,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:39,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:48:39,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:48:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:48:39,987 INFO L87 Difference]: Start difference. First operand 2871 states and 7264 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:42,491 INFO L93 Difference]: Finished difference Result 5235 states and 13259 transitions. [2022-02-11 00:48:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 00:48:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:42,498 INFO L225 Difference]: With dead ends: 5235 [2022-02-11 00:48:42,498 INFO L226 Difference]: Without dead ends: 5198 [2022-02-11 00:48:42,499 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=947, Invalid=7063, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 00:48:42,499 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 498 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:42,499 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 226 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:48:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2022-02-11 00:48:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 2874. [2022-02-11 00:48:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2873 states have (on average 2.5297598329272537) internal successors, (7268), 2873 states have internal predecessors, (7268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 7268 transitions. [2022-02-11 00:48:42,540 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 7268 transitions. Word has length 30 [2022-02-11 00:48:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:42,540 INFO L470 AbstractCegarLoop]: Abstraction has 2874 states and 7268 transitions. [2022-02-11 00:48:42,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 7268 transitions. [2022-02-11 00:48:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:42,543 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:42,543 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:42,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-02-11 00:48:42,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-11 00:48:42,745 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash -673875012, now seen corresponding path program 72 times [2022-02-11 00:48:42,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:42,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437684273] [2022-02-11 00:48:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:42,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:43,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:43,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437684273] [2022-02-11 00:48:43,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437684273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:43,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801675726] [2022-02-11 00:48:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:48:43,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:43,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:43,022 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) [2022-02-11 00:48:43,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-11 00:48:43,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:48:43,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:43,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:43,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-02-11 00:48:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:43,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:43,516 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:43,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:48:43,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:43,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:43,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:43,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801675726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:43,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:43,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 32 [2022-02-11 00:48:43,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387606731] [2022-02-11 00:48:43,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:43,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 00:48:43,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 00:48:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:48:43,592 INFO L87 Difference]: Start difference. First operand 2874 states and 7268 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:45,405 INFO L93 Difference]: Finished difference Result 4778 states and 12082 transitions. [2022-02-11 00:48:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:48:45,405 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:45,412 INFO L225 Difference]: With dead ends: 4778 [2022-02-11 00:48:45,412 INFO L226 Difference]: Without dead ends: 4765 [2022-02-11 00:48:45,412 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=447, Invalid=3975, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:48:45,412 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 368 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:45,412 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 293 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3351 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:48:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4765 states. [2022-02-11 00:48:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4765 to 2862. [2022-02-11 00:48:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.52953512757777) internal successors, (7237), 2861 states have internal predecessors, (7237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 7237 transitions. [2022-02-11 00:48:45,484 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 7237 transitions. Word has length 30 [2022-02-11 00:48:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:45,484 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 7237 transitions. [2022-02-11 00:48:45,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 7237 transitions. [2022-02-11 00:48:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:45,487 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:45,487 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:45,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:45,693 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,SelfDestructingSolverStorable201 [2022-02-11 00:48:45,694 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:45,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash 400370672, now seen corresponding path program 73 times [2022-02-11 00:48:45,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:45,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129397074] [2022-02-11 00:48:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:45,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:45,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:45,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129397074] [2022-02-11 00:48:45,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129397074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:45,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952654399] [2022-02-11 00:48:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:48:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:45,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:45,890 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) [2022-02-11 00:48:45,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-11 00:48:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:45,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:46,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:48:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:46,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:46,289 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:46,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:46,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:46,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:46,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:46,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952654399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:46,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:46,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:48:46,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813618829] [2022-02-11 00:48:46,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:46,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:48:46,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:48:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:48:46,359 INFO L87 Difference]: Start difference. First operand 2862 states and 7237 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:47,947 INFO L93 Difference]: Finished difference Result 4999 states and 12657 transitions. [2022-02-11 00:48:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:48:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:47,954 INFO L225 Difference]: With dead ends: 4999 [2022-02-11 00:48:47,954 INFO L226 Difference]: Without dead ends: 4986 [2022-02-11 00:48:47,954 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=532, Invalid=3890, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:48:47,955 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 332 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:47,955 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 185 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:48:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2022-02-11 00:48:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 2868. [2022-02-11 00:48:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 2.5291245204046042) internal successors, (7251), 2867 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 7251 transitions. [2022-02-11 00:48:47,996 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 7251 transitions. Word has length 30 [2022-02-11 00:48:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:47,996 INFO L470 AbstractCegarLoop]: Abstraction has 2868 states and 7251 transitions. [2022-02-11 00:48:47,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 7251 transitions. [2022-02-11 00:48:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:47,999 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:47,999 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:48,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:48,214 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,SelfDestructingSolverStorable202 [2022-02-11 00:48:48,215 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2138195574, now seen corresponding path program 74 times [2022-02-11 00:48:48,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:48,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38926343] [2022-02-11 00:48:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:48,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:48,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:48,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38926343] [2022-02-11 00:48:48,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38926343] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:48,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874726131] [2022-02-11 00:48:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:48:48,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:48,399 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) [2022-02-11 00:48:48,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-11 00:48:48,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:48:48,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:48,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:48,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:48,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:48:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:48,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:48,823 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:48,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:48:48,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:48,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:48,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:48,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874726131] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:48,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:48,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-11 00:48:48,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867064153] [2022-02-11 00:48:48,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:48,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:48:48,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:48:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:48:48,902 INFO L87 Difference]: Start difference. First operand 2868 states and 7251 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:50,305 INFO L93 Difference]: Finished difference Result 4653 states and 11727 transitions. [2022-02-11 00:48:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:48:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:50,312 INFO L225 Difference]: With dead ends: 4653 [2022-02-11 00:48:50,312 INFO L226 Difference]: Without dead ends: 4626 [2022-02-11 00:48:50,313 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=486, Invalid=3674, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:48:50,313 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 407 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:50,313 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 182 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:48:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4626 states. [2022-02-11 00:48:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4626 to 2868. [2022-02-11 00:48:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 2.528775723753052) internal successors, (7250), 2867 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 7250 transitions. [2022-02-11 00:48:50,352 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 7250 transitions. Word has length 30 [2022-02-11 00:48:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:50,352 INFO L470 AbstractCegarLoop]: Abstraction has 2868 states and 7250 transitions. [2022-02-11 00:48:50,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 7250 transitions. [2022-02-11 00:48:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:50,355 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:50,355 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:50,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-02-11 00:48:50,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:50,570 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:50,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2024219658, now seen corresponding path program 75 times [2022-02-11 00:48:50,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:50,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836334849] [2022-02-11 00:48:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:50,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:50,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:50,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836334849] [2022-02-11 00:48:50,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836334849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:50,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080792036] [2022-02-11 00:48:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:48:50,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:50,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:50,882 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) [2022-02-11 00:48:50,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-11 00:48:50,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:48:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:50,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:48:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:51,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:51,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-02-11 00:48:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:51,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:51,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:48:51,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-02-11 00:48:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:51,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080792036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:51,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:51,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-02-11 00:48:51,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044495469] [2022-02-11 00:48:51,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:51,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:48:51,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:51,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:48:51,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:48:51,789 INFO L87 Difference]: Start difference. First operand 2868 states and 7250 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:48:57,196 INFO L93 Difference]: Finished difference Result 6008 states and 15392 transitions. [2022-02-11 00:48:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-11 00:48:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:48:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:48:57,205 INFO L225 Difference]: With dead ends: 6008 [2022-02-11 00:48:57,205 INFO L226 Difference]: Without dead ends: 5992 [2022-02-11 00:48:57,206 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2022, Invalid=10188, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 00:48:57,206 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 548 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 962 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:48:57,206 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 205 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1536 Invalid, 0 Unknown, 962 Unchecked, 0.8s Time] [2022-02-11 00:48:57,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2022-02-11 00:48:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 2870. [2022-02-11 00:48:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 2.5287556639944233) internal successors, (7255), 2869 states have internal predecessors, (7255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 7255 transitions. [2022-02-11 00:48:57,253 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 7255 transitions. Word has length 30 [2022-02-11 00:48:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:48:57,253 INFO L470 AbstractCegarLoop]: Abstraction has 2870 states and 7255 transitions. [2022-02-11 00:48:57,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:48:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 7255 transitions. [2022-02-11 00:48:57,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:48:57,256 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:48:57,256 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:48:57,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-02-11 00:48:57,471 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,SelfDestructingSolverStorable204 [2022-02-11 00:48:57,471 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:48:57,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:48:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash -986189982, now seen corresponding path program 76 times [2022-02-11 00:48:57,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:48:57,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540392616] [2022-02-11 00:48:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:48:57,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:48:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:48:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:57,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:48:57,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540392616] [2022-02-11 00:48:57,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540392616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:48:57,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773120781] [2022-02-11 00:48:57,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:48:57,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:48:57,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:48:57,729 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) [2022-02-11 00:48:57,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-11 00:48:57,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:48:57,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:48:57,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:48:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:48:58,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:48:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:58,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:48:58,374 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:48:58,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:48:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:58,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:48:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:48:58,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:48:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:48:58,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773120781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:48:58,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:48:58,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:48:58,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217447483] [2022-02-11 00:48:58,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:48:58,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:48:58,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:48:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:48:58,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:48:58,477 INFO L87 Difference]: Start difference. First operand 2870 states and 7255 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:01,270 INFO L93 Difference]: Finished difference Result 5084 states and 12714 transitions. [2022-02-11 00:49:01,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:49:01,270 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:01,277 INFO L225 Difference]: With dead ends: 5084 [2022-02-11 00:49:01,278 INFO L226 Difference]: Without dead ends: 5042 [2022-02-11 00:49:01,278 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=562, Invalid=3994, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:49:01,278 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 451 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:01,278 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 398 Invalid, 3573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 3321 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-11 00:49:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5042 states. [2022-02-11 00:49:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 2885. [2022-02-11 00:49:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.5270457697642166) internal successors, (7288), 2884 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 7288 transitions. [2022-02-11 00:49:01,323 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 7288 transitions. Word has length 30 [2022-02-11 00:49:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:01,323 INFO L470 AbstractCegarLoop]: Abstraction has 2885 states and 7288 transitions. [2022-02-11 00:49:01,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 7288 transitions. [2022-02-11 00:49:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:01,326 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:01,326 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:01,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:01,542 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,SelfDestructingSolverStorable205 [2022-02-11 00:49:01,542 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash -210418558, now seen corresponding path program 77 times [2022-02-11 00:49:01,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:01,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079352530] [2022-02-11 00:49:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:01,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:01,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079352530] [2022-02-11 00:49:01,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079352530] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:01,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727227296] [2022-02-11 00:49:01,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:01,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:01,855 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) [2022-02-11 00:49:01,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-11 00:49:01,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:49:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:01,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:02,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:49:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:02,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:02,409 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:02,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:02,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:02,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:02,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:02,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727227296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:02,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:02,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:49:02,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884391183] [2022-02-11 00:49:02,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:02,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:49:02,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:49:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:49:02,508 INFO L87 Difference]: Start difference. First operand 2885 states and 7288 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:06,046 INFO L93 Difference]: Finished difference Result 5852 states and 14730 transitions. [2022-02-11 00:49:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 00:49:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:06,054 INFO L225 Difference]: With dead ends: 5852 [2022-02-11 00:49:06,054 INFO L226 Difference]: Without dead ends: 5837 [2022-02-11 00:49:06,055 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1119, Invalid=8001, Unknown=0, NotChecked=0, Total=9120 [2022-02-11 00:49:06,055 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 495 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:06,055 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 302 Invalid, 3266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:49:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2022-02-11 00:49:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 2918. [2022-02-11 00:49:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2917 states have (on average 2.5269112101474116) internal successors, (7371), 2917 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 7371 transitions. [2022-02-11 00:49:06,098 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 7371 transitions. Word has length 30 [2022-02-11 00:49:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:06,098 INFO L470 AbstractCegarLoop]: Abstraction has 2918 states and 7371 transitions. [2022-02-11 00:49:06,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 7371 transitions. [2022-02-11 00:49:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:06,101 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:06,101 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:06,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:06,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:06,316 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash 454784610, now seen corresponding path program 78 times [2022-02-11 00:49:06,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:06,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249126368] [2022-02-11 00:49:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:06,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:06,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249126368] [2022-02-11 00:49:06,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249126368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:06,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500491578] [2022-02-11 00:49:06,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:06,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:06,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:06,576 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) [2022-02-11 00:49:06,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-11 00:49:06,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:49:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:06,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:49:06,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:06,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:06,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2022-02-11 00:49:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:07,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:07,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:07,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:07,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:07,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 57 [2022-02-11 00:49:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:07,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500491578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:07,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:07,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-02-11 00:49:07,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034297127] [2022-02-11 00:49:07,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:07,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 00:49:07,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 00:49:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 00:49:07,844 INFO L87 Difference]: Start difference. First operand 2918 states and 7371 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:13,335 INFO L93 Difference]: Finished difference Result 5349 states and 13484 transitions. [2022-02-11 00:49:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-11 00:49:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:13,342 INFO L225 Difference]: With dead ends: 5349 [2022-02-11 00:49:13,342 INFO L226 Difference]: Without dead ends: 5327 [2022-02-11 00:49:13,343 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4630 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2184, Invalid=11388, Unknown=0, NotChecked=0, Total=13572 [2022-02-11 00:49:13,343 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 575 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 5197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3287 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:13,343 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 247 Invalid, 5197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1594 Invalid, 0 Unknown, 3287 Unchecked, 0.6s Time] [2022-02-11 00:49:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2022-02-11 00:49:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 3062. [2022-02-11 00:49:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 2.5315256452139825) internal successors, (7749), 3061 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 7749 transitions. [2022-02-11 00:49:13,387 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 7749 transitions. Word has length 30 [2022-02-11 00:49:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:13,387 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 7749 transitions. [2022-02-11 00:49:13,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 7749 transitions. [2022-02-11 00:49:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:13,390 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:13,391 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:13,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:13,603 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,SelfDestructingSolverStorable207 [2022-02-11 00:49:13,603 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:13,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1453037920, now seen corresponding path program 79 times [2022-02-11 00:49:13,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:13,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102741065] [2022-02-11 00:49:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:13,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:13,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:13,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102741065] [2022-02-11 00:49:13,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102741065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:13,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002554088] [2022-02-11 00:49:13,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:13,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:13,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:13,811 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) [2022-02-11 00:49:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-11 00:49:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:13,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:14,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-11 00:49:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:14,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:14,248 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:14,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:14,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:14,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:14,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:14,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:14,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002554088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:14,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:14,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:49:14,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485169352] [2022-02-11 00:49:14,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:49:14,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:49:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:49:14,322 INFO L87 Difference]: Start difference. First operand 3062 states and 7749 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:16,074 INFO L93 Difference]: Finished difference Result 5184 states and 12984 transitions. [2022-02-11 00:49:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:49:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:16,082 INFO L225 Difference]: With dead ends: 5184 [2022-02-11 00:49:16,082 INFO L226 Difference]: Without dead ends: 5157 [2022-02-11 00:49:16,083 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=580, Invalid=4250, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:49:16,083 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 472 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:16,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 263 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:49:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2022-02-11 00:49:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3064. [2022-02-11 00:49:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3063 states have (on average 2.5301991511589943) internal successors, (7750), 3063 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 7750 transitions. [2022-02-11 00:49:16,126 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 7750 transitions. Word has length 30 [2022-02-11 00:49:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:16,126 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 7750 transitions. [2022-02-11 00:49:16,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 7750 transitions. [2022-02-11 00:49:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:16,129 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:16,129 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:16,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:16,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:16,345 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:16,345 INFO L85 PathProgramCache]: Analyzing trace with hash 918736294, now seen corresponding path program 80 times [2022-02-11 00:49:16,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:16,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673285810] [2022-02-11 00:49:16,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:16,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:16,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:16,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673285810] [2022-02-11 00:49:16,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673285810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:16,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462473633] [2022-02-11 00:49:16,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:16,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:16,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:16,536 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) [2022-02-11 00:49:16,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-11 00:49:16,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:16,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:16,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-02-11 00:49:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:16,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:16,984 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:16,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:49:17,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:17,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:17,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:17,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:17,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462473633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:17,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:17,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:49:17,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647398403] [2022-02-11 00:49:17,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:17,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:49:17,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:49:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:49:17,059 INFO L87 Difference]: Start difference. First operand 3064 states and 7750 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:18,743 INFO L93 Difference]: Finished difference Result 5316 states and 13410 transitions. [2022-02-11 00:49:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 00:49:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:18,750 INFO L225 Difference]: With dead ends: 5316 [2022-02-11 00:49:18,750 INFO L226 Difference]: Without dead ends: 5281 [2022-02-11 00:49:18,751 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=623, Invalid=4347, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:49:18,751 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 462 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 2064 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:18,751 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 250 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2064 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:49:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2022-02-11 00:49:18,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 3021. [2022-02-11 00:49:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3020 states have (on average 2.529139072847682) internal successors, (7638), 3020 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 7638 transitions. [2022-02-11 00:49:18,796 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 7638 transitions. Word has length 30 [2022-02-11 00:49:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:18,796 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 7638 transitions. [2022-02-11 00:49:18,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 7638 transitions. [2022-02-11 00:49:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:18,800 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:18,800 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:18,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-02-11 00:49:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-02-11 00:49:19,015 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2064792814, now seen corresponding path program 81 times [2022-02-11 00:49:19,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:19,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832705887] [2022-02-11 00:49:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:19,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:19,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832705887] [2022-02-11 00:49:19,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832705887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:19,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181529897] [2022-02-11 00:49:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:19,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:19,272 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) [2022-02-11 00:49:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-11 00:49:19,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:49:19,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:19,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:19,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:49:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:19,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:19,709 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:19,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:19,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:19,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:19,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:19,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181529897] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:19,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:19,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:49:19,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844701563] [2022-02-11 00:49:19,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:19,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:49:19,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:49:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:49:19,780 INFO L87 Difference]: Start difference. First operand 3021 states and 7638 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:21,028 INFO L93 Difference]: Finished difference Result 4969 states and 12488 transitions. [2022-02-11 00:49:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 00:49:21,029 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:21,036 INFO L225 Difference]: With dead ends: 4969 [2022-02-11 00:49:21,036 INFO L226 Difference]: Without dead ends: 4960 [2022-02-11 00:49:21,036 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=2528, Unknown=0, NotChecked=0, Total=2862 [2022-02-11 00:49:21,037 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 325 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 2800 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:21,037 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 415 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2800 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:49:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2022-02-11 00:49:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 3018. [2022-02-11 00:49:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 3017 states have (on average 2.5293337752734506) internal successors, (7631), 3017 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 7631 transitions. [2022-02-11 00:49:21,082 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 7631 transitions. Word has length 30 [2022-02-11 00:49:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:21,082 INFO L470 AbstractCegarLoop]: Abstraction has 3018 states and 7631 transitions. [2022-02-11 00:49:21,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 7631 transitions. [2022-02-11 00:49:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:21,085 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:21,085 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:21,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-02-11 00:49:21,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-11 00:49:21,301 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash -933223622, now seen corresponding path program 51 times [2022-02-11 00:49:21,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:21,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859151927] [2022-02-11 00:49:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:21,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:21,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859151927] [2022-02-11 00:49:21,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859151927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:21,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141041085] [2022-02-11 00:49:21,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:21,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:21,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:21,517 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) [2022-02-11 00:49:21,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-11 00:49:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 00:49:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:21,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:21,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:49:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:21,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:21,957 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:21,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:21,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:21,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:21,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:49:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:22,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141041085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:22,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:22,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:49:22,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126537485] [2022-02-11 00:49:22,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:22,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:22,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:22,037 INFO L87 Difference]: Start difference. First operand 3018 states and 7631 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:23,128 INFO L93 Difference]: Finished difference Result 4991 states and 12548 transitions. [2022-02-11 00:49:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-11 00:49:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:23,137 INFO L225 Difference]: With dead ends: 4991 [2022-02-11 00:49:23,137 INFO L226 Difference]: Without dead ends: 4982 [2022-02-11 00:49:23,137 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 00:49:23,137 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 419 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:23,137 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 262 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:49:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2022-02-11 00:49:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3048. [2022-02-11 00:49:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 2.5260912372825732) internal successors, (7697), 3047 states have internal predecessors, (7697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 7697 transitions. [2022-02-11 00:49:23,186 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 7697 transitions. Word has length 30 [2022-02-11 00:49:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:23,186 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 7697 transitions. [2022-02-11 00:49:23,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 7697 transitions. [2022-02-11 00:49:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:23,190 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:23,190 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:23,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:23,405 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,SelfDestructingSolverStorable211 [2022-02-11 00:49:23,406 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:23,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1222951236, now seen corresponding path program 52 times [2022-02-11 00:49:23,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:23,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332803773] [2022-02-11 00:49:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:23,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:23,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:23,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332803773] [2022-02-11 00:49:23,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332803773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:23,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297569414] [2022-02-11 00:49:23,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:49:23,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:23,628 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) [2022-02-11 00:49:23,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-11 00:49:23,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:49:23,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:23,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:23,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:24,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:49:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:24,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:24,318 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:24,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:24,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:24,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:24,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:49:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:24,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297569414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:24,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:24,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:49:24,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735886611] [2022-02-11 00:49:24,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:24,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:24,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:24,425 INFO L87 Difference]: Start difference. First operand 3048 states and 7697 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:25,900 INFO L93 Difference]: Finished difference Result 5373 states and 13478 transitions. [2022-02-11 00:49:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 00:49:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:25,909 INFO L225 Difference]: With dead ends: 5373 [2022-02-11 00:49:25,909 INFO L226 Difference]: Without dead ends: 5356 [2022-02-11 00:49:25,909 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 00:49:25,909 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 409 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:25,909 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 337 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:49:25,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-02-11 00:49:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 3065. [2022-02-11 00:49:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5267624020887727) internal successors, (7742), 3064 states have internal predecessors, (7742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7742 transitions. [2022-02-11 00:49:25,955 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7742 transitions. Word has length 30 [2022-02-11 00:49:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:25,955 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 7742 transitions. [2022-02-11 00:49:25,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7742 transitions. [2022-02-11 00:49:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:25,958 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:25,958 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:25,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:26,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-11 00:49:26,173 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash 670553370, now seen corresponding path program 53 times [2022-02-11 00:49:26,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:26,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646470233] [2022-02-11 00:49:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:26,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:26,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:26,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646470233] [2022-02-11 00:49:26,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646470233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:26,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777506243] [2022-02-11 00:49:26,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:26,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:26,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:26,401 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) [2022-02-11 00:49:26,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-11 00:49:26,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:49:26,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:26,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:26,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:26,632 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:49:26,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-11 00:49:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:26,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:26,843 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:26,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:26,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:26,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:26,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:26,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:49:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:26,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777506243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:26,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:26,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:49:26,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429914203] [2022-02-11 00:49:26,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:26,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:26,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:26,917 INFO L87 Difference]: Start difference. First operand 3065 states and 7742 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:28,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:28,756 INFO L93 Difference]: Finished difference Result 5999 states and 15107 transitions. [2022-02-11 00:49:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:49:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:28,765 INFO L225 Difference]: With dead ends: 5999 [2022-02-11 00:49:28,765 INFO L226 Difference]: Without dead ends: 5986 [2022-02-11 00:49:28,766 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=608, Invalid=3424, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:49:28,766 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 392 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:28,766 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 260 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:49:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2022-02-11 00:49:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 3061. [2022-02-11 00:49:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.527124183006536) internal successors, (7733), 3060 states have internal predecessors, (7733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7733 transitions. [2022-02-11 00:49:28,820 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7733 transitions. Word has length 30 [2022-02-11 00:49:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:28,820 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 7733 transitions. [2022-02-11 00:49:28,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7733 transitions. [2022-02-11 00:49:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:28,824 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:28,824 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:28,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:29,037 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,SelfDestructingSolverStorable213 [2022-02-11 00:49:29,037 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:29,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1335756538, now seen corresponding path program 54 times [2022-02-11 00:49:29,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:29,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619987453] [2022-02-11 00:49:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:29,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:29,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:29,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619987453] [2022-02-11 00:49:29,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619987453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:29,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699152293] [2022-02-11 00:49:29,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:29,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:29,243 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) [2022-02-11 00:49:29,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-11 00:49:29,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 00:49:29,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:29,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:29,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:49:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:29,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:29,674 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:29,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:29,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:29,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:29,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:29,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699152293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:29,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:29,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:49:29,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379576603] [2022-02-11 00:49:29,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:29,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:49:29,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:49:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:49:29,745 INFO L87 Difference]: Start difference. First operand 3061 states and 7733 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:31,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:31,103 INFO L93 Difference]: Finished difference Result 5116 states and 12913 transitions. [2022-02-11 00:49:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 00:49:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:31,111 INFO L225 Difference]: With dead ends: 5116 [2022-02-11 00:49:31,111 INFO L226 Difference]: Without dead ends: 5098 [2022-02-11 00:49:31,112 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=386, Invalid=2584, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:49:31,112 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 399 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:31,112 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 210 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:49:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2022-02-11 00:49:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 3051. [2022-02-11 00:49:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 3050 states have (on average 2.525901639344262) internal successors, (7704), 3050 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 7704 transitions. [2022-02-11 00:49:31,163 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 7704 transitions. Word has length 30 [2022-02-11 00:49:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:31,163 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 7704 transitions. [2022-02-11 00:49:31,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 7704 transitions. [2022-02-11 00:49:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:31,167 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:31,167 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:31,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:31,382 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,SelfDestructingSolverStorable214 [2022-02-11 00:49:31,382 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:31,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1799082352, now seen corresponding path program 55 times [2022-02-11 00:49:31,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:31,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921695430] [2022-02-11 00:49:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:31,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:31,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:31,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921695430] [2022-02-11 00:49:31,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921695430] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:31,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696131175] [2022-02-11 00:49:31,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:31,593 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) [2022-02-11 00:49:31,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-11 00:49:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:31,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:31,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:49:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:31,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:32,112 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:32,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:32,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:32,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:32,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:49:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:32,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696131175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:32,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:32,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:49:32,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47572331] [2022-02-11 00:49:32,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:32,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:32,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:32,192 INFO L87 Difference]: Start difference. First operand 3051 states and 7704 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:33,547 INFO L93 Difference]: Finished difference Result 5095 states and 12813 transitions. [2022-02-11 00:49:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-11 00:49:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:33,554 INFO L225 Difference]: With dead ends: 5095 [2022-02-11 00:49:33,554 INFO L226 Difference]: Without dead ends: 5086 [2022-02-11 00:49:33,555 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=2281, Unknown=0, NotChecked=0, Total=2652 [2022-02-11 00:49:33,555 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 364 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:33,555 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 322 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:49:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2022-02-11 00:49:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 3048. [2022-02-11 00:49:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3047 states have (on average 2.5260912372825732) internal successors, (7697), 3047 states have internal predecessors, (7697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 7697 transitions. [2022-02-11 00:49:33,609 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 7697 transitions. Word has length 30 [2022-02-11 00:49:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:33,610 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 7697 transitions. [2022-02-11 00:49:33,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 7697 transitions. [2022-02-11 00:49:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:33,613 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:33,613 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:33,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:33,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:33,827 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1719457060, now seen corresponding path program 56 times [2022-02-11 00:49:33,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:33,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224530219] [2022-02-11 00:49:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:34,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:34,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224530219] [2022-02-11 00:49:34,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224530219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:34,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852024586] [2022-02-11 00:49:34,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:34,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:34,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:34,160 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) [2022-02-11 00:49:34,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-11 00:49:34,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:34,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:34,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:34,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:34,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:49:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:34,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:34,581 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:34,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:34,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:49:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:34,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852024586] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:34,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:34,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:49:34,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627920675] [2022-02-11 00:49:34,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:49:34,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:49:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:49:34,659 INFO L87 Difference]: Start difference. First operand 3048 states and 7697 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:36,352 INFO L93 Difference]: Finished difference Result 5097 states and 12824 transitions. [2022-02-11 00:49:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:49:36,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:36,360 INFO L225 Difference]: With dead ends: 5097 [2022-02-11 00:49:36,360 INFO L226 Difference]: Without dead ends: 5070 [2022-02-11 00:49:36,360 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=614, Invalid=3418, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:49:36,361 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:36,361 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 271 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:49:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2022-02-11 00:49:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 3080. [2022-02-11 00:49:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 2.5264696329977268) internal successors, (7779), 3079 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 7779 transitions. [2022-02-11 00:49:36,406 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 7779 transitions. Word has length 30 [2022-02-11 00:49:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:36,407 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 7779 transitions. [2022-02-11 00:49:36,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 7779 transitions. [2022-02-11 00:49:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:36,410 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:36,410 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:36,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-02-11 00:49:36,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:36,616 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1098969924, now seen corresponding path program 57 times [2022-02-11 00:49:36,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:36,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900301539] [2022-02-11 00:49:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:36,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:36,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900301539] [2022-02-11 00:49:36,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900301539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:36,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950370557] [2022-02-11 00:49:36,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:49:36,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:36,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:36,937 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) [2022-02-11 00:49:36,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-11 00:49:36,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:49:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:36,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:49:36,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:37,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:37,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-02-11 00:49:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:37,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:37,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:37,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:37,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:49:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:37,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950370557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:37,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:37,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-02-11 00:49:37,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651190043] [2022-02-11 00:49:37,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:37,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 00:49:37,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 00:49:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:49:37,881 INFO L87 Difference]: Start difference. First operand 3080 states and 7779 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:42,503 INFO L93 Difference]: Finished difference Result 6451 states and 16326 transitions. [2022-02-11 00:49:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-11 00:49:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:42,512 INFO L225 Difference]: With dead ends: 6451 [2022-02-11 00:49:42,512 INFO L226 Difference]: Without dead ends: 6436 [2022-02-11 00:49:42,513 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3937 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2084, Invalid=9258, Unknown=0, NotChecked=0, Total=11342 [2022-02-11 00:49:42,513 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 673 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1106 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:42,513 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 162 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1482 Invalid, 0 Unknown, 1106 Unchecked, 0.7s Time] [2022-02-11 00:49:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2022-02-11 00:49:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 3101. [2022-02-11 00:49:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 2.526774193548387) internal successors, (7833), 3100 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 7833 transitions. [2022-02-11 00:49:42,563 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 7833 transitions. Word has length 30 [2022-02-11 00:49:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:42,563 INFO L470 AbstractCegarLoop]: Abstraction has 3101 states and 7833 transitions. [2022-02-11 00:49:42,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 7833 transitions. [2022-02-11 00:49:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:42,566 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:42,566 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:42,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-02-11 00:49:42,780 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,SelfDestructingSolverStorable217 [2022-02-11 00:49:42,781 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 7772042, now seen corresponding path program 58 times [2022-02-11 00:49:42,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:42,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686478290] [2022-02-11 00:49:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:42,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:42,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686478290] [2022-02-11 00:49:42,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686478290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:42,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986899640] [2022-02-11 00:49:42,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:49:42,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:42,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:42,977 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) [2022-02-11 00:49:42,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-11 00:49:42,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:49:42,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:42,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:42,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:43,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:49:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:43,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:43,401 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:43,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:43,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:43,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:43,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:49:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:43,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986899640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:43,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:43,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:49:43,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692585423] [2022-02-11 00:49:43,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:43,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:49:43,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:49:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:49:43,473 INFO L87 Difference]: Start difference. First operand 3101 states and 7833 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:45,077 INFO L93 Difference]: Finished difference Result 5575 states and 14100 transitions. [2022-02-11 00:49:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:49:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:45,085 INFO L225 Difference]: With dead ends: 5575 [2022-02-11 00:49:45,085 INFO L226 Difference]: Without dead ends: 5556 [2022-02-11 00:49:45,086 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=548, Invalid=3484, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:49:45,086 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 332 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:45,086 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 227 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:49:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2022-02-11 00:49:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3095. [2022-02-11 00:49:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 2.5277957336780865) internal successors, (7821), 3094 states have internal predecessors, (7821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 7821 transitions. [2022-02-11 00:49:45,148 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 7821 transitions. Word has length 30 [2022-02-11 00:49:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:45,148 INFO L470 AbstractCegarLoop]: Abstraction has 3095 states and 7821 transitions. [2022-02-11 00:49:45,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 7821 transitions. [2022-02-11 00:49:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:45,152 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:45,152 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:45,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-02-11 00:49:45,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:45,369 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1764173092, now seen corresponding path program 59 times [2022-02-11 00:49:45,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:45,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528131811] [2022-02-11 00:49:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:45,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:45,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:45,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528131811] [2022-02-11 00:49:45,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528131811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:45,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804594173] [2022-02-11 00:49:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:49:45,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:45,620 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) [2022-02-11 00:49:45,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-11 00:49:45,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:49:45,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:45,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:45,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:49:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:45,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:46,174 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:46,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:46,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:46,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:46,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:46,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804594173] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:46,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:46,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:49:46,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660257961] [2022-02-11 00:49:46,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:46,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:49:46,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:46,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:49:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:49:46,293 INFO L87 Difference]: Start difference. First operand 3095 states and 7821 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:48,304 INFO L93 Difference]: Finished difference Result 4860 states and 12249 transitions. [2022-02-11 00:49:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:49:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:48,311 INFO L225 Difference]: With dead ends: 4860 [2022-02-11 00:49:48,311 INFO L226 Difference]: Without dead ends: 4834 [2022-02-11 00:49:48,311 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:49:48,311 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 329 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:48,312 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 219 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:49:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2022-02-11 00:49:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 3085. [2022-02-11 00:49:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 2.527237354085603) internal successors, (7794), 3084 states have internal predecessors, (7794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 7794 transitions. [2022-02-11 00:49:48,354 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 7794 transitions. Word has length 30 [2022-02-11 00:49:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:48,354 INFO L470 AbstractCegarLoop]: Abstraction has 3085 states and 7794 transitions. [2022-02-11 00:49:48,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 7794 transitions. [2022-02-11 00:49:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:48,357 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:48,357 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:48,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:48,571 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,SelfDestructingSolverStorable219 [2022-02-11 00:49:48,571 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2108464666, now seen corresponding path program 60 times [2022-02-11 00:49:48,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:48,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019791281] [2022-02-11 00:49:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:48,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:48,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019791281] [2022-02-11 00:49:48,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019791281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:48,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139495999] [2022-02-11 00:49:48,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:49:48,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:48,859 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) [2022-02-11 00:49:48,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-11 00:49:48,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:49:48,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:48,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:49:48,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:49,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:49,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:49:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:49,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:49,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:49,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:49,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:49:49,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:49:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:50,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139495999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:50,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:50,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:49:50,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970763992] [2022-02-11 00:49:50,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:50,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:49:50,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:50,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:49:50,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:49:50,011 INFO L87 Difference]: Start difference. First operand 3085 states and 7794 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:53,508 INFO L93 Difference]: Finished difference Result 5407 states and 13779 transitions. [2022-02-11 00:49:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 00:49:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:53,515 INFO L225 Difference]: With dead ends: 5407 [2022-02-11 00:49:53,515 INFO L226 Difference]: Without dead ends: 5396 [2022-02-11 00:49:53,516 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 00:49:53,516 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 403 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2596 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:53,516 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 182 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1289 Invalid, 0 Unknown, 2596 Unchecked, 0.5s Time] [2022-02-11 00:49:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5396 states. [2022-02-11 00:49:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5396 to 3156. [2022-02-11 00:49:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 2.5315372424722664) internal successors, (7987), 3155 states have internal predecessors, (7987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 7987 transitions. [2022-02-11 00:49:53,559 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 7987 transitions. Word has length 30 [2022-02-11 00:49:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:53,559 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 7987 transitions. [2022-02-11 00:49:53,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 7987 transitions. [2022-02-11 00:49:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:53,562 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:53,562 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:53,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:53,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:53,766 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash -352063616, now seen corresponding path program 61 times [2022-02-11 00:49:53,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:53,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580121116] [2022-02-11 00:49:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:54,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:54,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580121116] [2022-02-11 00:49:54,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580121116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:54,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318625705] [2022-02-11 00:49:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:49:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:54,037 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) [2022-02-11 00:49:54,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-11 00:49:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:54,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:54,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:54,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:49:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:54,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:54,680 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:54,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:54,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:54,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:54,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:54,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318625705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:54,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:54,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:49:54,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300735693] [2022-02-11 00:49:54,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:54,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:49:54,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:49:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:49:54,747 INFO L87 Difference]: Start difference. First operand 3156 states and 7987 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:56,817 INFO L93 Difference]: Finished difference Result 5008 states and 12696 transitions. [2022-02-11 00:49:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:49:56,817 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:56,825 INFO L225 Difference]: With dead ends: 5008 [2022-02-11 00:49:56,825 INFO L226 Difference]: Without dead ends: 4994 [2022-02-11 00:49:56,825 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=460, Invalid=3700, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:49:56,826 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 384 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:56,826 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 221 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:49:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2022-02-11 00:49:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 3163. [2022-02-11 00:49:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.5309930423782414) internal successors, (8003), 3162 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) [2022-02-11 00:49:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8003 transitions. [2022-02-11 00:49:56,873 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8003 transitions. Word has length 30 [2022-02-11 00:49:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:56,873 INFO L470 AbstractCegarLoop]: Abstraction has 3163 states and 8003 transitions. [2022-02-11 00:49:56,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8003 transitions. [2022-02-11 00:49:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:56,877 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:56,877 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:56,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-11 00:49:57,087 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,SelfDestructingSolverStorable221 [2022-02-11 00:49:57,087 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:49:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:49:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash 183380592, now seen corresponding path program 62 times [2022-02-11 00:49:57,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:49:57,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367178882] [2022-02-11 00:49:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:49:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:49:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:49:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:49:57,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367178882] [2022-02-11 00:49:57,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367178882] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:49:57,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332884171] [2022-02-11 00:49:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:49:57,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:49:57,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:49:57,321 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) [2022-02-11 00:49:57,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-11 00:49:57,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:49:57,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:49:57,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:49:57,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:49:57,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:49:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:57,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:49:57,923 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:49:57,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:49:57,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:57,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:49:57,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:49:57,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:49:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:49:58,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332884171] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:49:58,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:49:58,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:49:58,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925275942] [2022-02-11 00:49:58,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:49:58,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:49:58,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:49:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:49:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:49:58,029 INFO L87 Difference]: Start difference. First operand 3163 states and 8003 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:49:59,893 INFO L93 Difference]: Finished difference Result 4974 states and 12584 transitions. [2022-02-11 00:49:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:49:59,893 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:49:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:49:59,900 INFO L225 Difference]: With dead ends: 4974 [2022-02-11 00:49:59,900 INFO L226 Difference]: Without dead ends: 4964 [2022-02-11 00:49:59,901 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=367, Invalid=3293, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:49:59,901 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 331 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:49:59,901 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 224 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:49:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2022-02-11 00:49:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 3162. [2022-02-11 00:49:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3162 states, 3161 states have (on average 2.531161024992091) internal successors, (8001), 3161 states have internal predecessors, (8001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 8001 transitions. [2022-02-11 00:49:59,953 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 8001 transitions. Word has length 30 [2022-02-11 00:49:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:49:59,953 INFO L470 AbstractCegarLoop]: Abstraction has 3162 states and 8001 transitions. [2022-02-11 00:49:59,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:49:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 8001 transitions. [2022-02-11 00:49:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:49:59,956 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:49:59,956 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:49:59,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-11 00:50:00,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-11 00:50:00,160 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1799589630, now seen corresponding path program 63 times [2022-02-11 00:50:00,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:00,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107564802] [2022-02-11 00:50:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:00,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:00,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:00,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107564802] [2022-02-11 00:50:00,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107564802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:00,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022541457] [2022-02-11 00:50:00,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:00,447 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) [2022-02-11 00:50:00,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-11 00:50:00,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:50:00,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:00,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:00,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:50:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:00,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:01,051 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:01,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:01,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:01,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:01,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:01,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:50:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:01,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022541457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:01,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:01,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:50:01,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9065694] [2022-02-11 00:50:01,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:01,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:01,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:01,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:01,136 INFO L87 Difference]: Start difference. First operand 3162 states and 8001 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:03,860 INFO L93 Difference]: Finished difference Result 6661 states and 16986 transitions. [2022-02-11 00:50:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 00:50:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:03,871 INFO L225 Difference]: With dead ends: 6661 [2022-02-11 00:50:03,872 INFO L226 Difference]: Without dead ends: 6634 [2022-02-11 00:50:03,872 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=909, Invalid=6401, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:50:03,873 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 494 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:03,873 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 197 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:50:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6634 states. [2022-02-11 00:50:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6634 to 3155. [2022-02-11 00:50:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 2.5313887127457195) internal successors, (7984), 3154 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 7984 transitions. [2022-02-11 00:50:03,928 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 7984 transitions. Word has length 30 [2022-02-11 00:50:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:03,928 INFO L470 AbstractCegarLoop]: Abstraction has 3155 states and 7984 transitions. [2022-02-11 00:50:03,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 7984 transitions. [2022-02-11 00:50:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:03,932 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:03,932 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:03,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:04,134 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,SelfDestructingSolverStorable223 [2022-02-11 00:50:04,134 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1420028430, now seen corresponding path program 64 times [2022-02-11 00:50:04,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:04,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731496735] [2022-02-11 00:50:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:04,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:04,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731496735] [2022-02-11 00:50:04,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731496735] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:04,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257774647] [2022-02-11 00:50:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:04,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:04,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:04,409 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) [2022-02-11 00:50:04,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-11 00:50:04,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:04,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:04,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:04,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-02-11 00:50:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:04,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:04,883 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:04,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:04,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:04,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:04,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:50:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:04,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257774647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:04,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:04,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:50:04,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539324850] [2022-02-11 00:50:04,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:04,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:50:04,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:50:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:50:04,973 INFO L87 Difference]: Start difference. First operand 3155 states and 7984 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:07,195 INFO L93 Difference]: Finished difference Result 5457 states and 13709 transitions. [2022-02-11 00:50:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:50:07,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:07,203 INFO L225 Difference]: With dead ends: 5457 [2022-02-11 00:50:07,203 INFO L226 Difference]: Without dead ends: 5432 [2022-02-11 00:50:07,203 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 00:50:07,204 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 447 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:07,204 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 259 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:50:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5432 states. [2022-02-11 00:50:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5432 to 3185. [2022-02-11 00:50:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 2.5326633165829144) internal successors, (8064), 3184 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 8064 transitions. [2022-02-11 00:50:07,259 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 8064 transitions. Word has length 30 [2022-02-11 00:50:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:07,260 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 8064 transitions. [2022-02-11 00:50:07,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 8064 transitions. [2022-02-11 00:50:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:07,265 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:07,265 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:07,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-02-11 00:50:07,479 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,SelfDestructingSolverStorable224 [2022-02-11 00:50:07,479 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 602502286, now seen corresponding path program 65 times [2022-02-11 00:50:07,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:07,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933377341] [2022-02-11 00:50:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:07,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:07,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:07,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933377341] [2022-02-11 00:50:07,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933377341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:07,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869390520] [2022-02-11 00:50:07,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:07,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:07,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:07,781 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) [2022-02-11 00:50:07,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-11 00:50:07,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:50:07,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:07,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:07,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:08,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:50:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:08,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:08,451 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:08,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:08,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:08,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:08,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:08,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:50:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:08,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869390520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:08,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:08,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:50:08,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056849451] [2022-02-11 00:50:08,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:08,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:50:08,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:50:08,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:50:08,576 INFO L87 Difference]: Start difference. First operand 3185 states and 8064 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:10,438 INFO L93 Difference]: Finished difference Result 5809 states and 14706 transitions. [2022-02-11 00:50:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 00:50:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:10,446 INFO L225 Difference]: With dead ends: 5809 [2022-02-11 00:50:10,447 INFO L226 Difference]: Without dead ends: 5790 [2022-02-11 00:50:10,447 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=522, Invalid=3138, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:50:10,447 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 348 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:10,447 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 222 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:50:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2022-02-11 00:50:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 3170. [2022-02-11 00:50:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.5329757021142316) internal successors, (8027), 3169 states have internal predecessors, (8027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 8027 transitions. [2022-02-11 00:50:10,498 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 8027 transitions. Word has length 30 [2022-02-11 00:50:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:10,498 INFO L470 AbstractCegarLoop]: Abstraction has 3170 states and 8027 transitions. [2022-02-11 00:50:10,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 8027 transitions. [2022-02-11 00:50:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:10,501 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:10,501 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:10,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:10,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:10,713 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1936063960, now seen corresponding path program 66 times [2022-02-11 00:50:10,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:10,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405606160] [2022-02-11 00:50:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:11,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:11,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405606160] [2022-02-11 00:50:11,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405606160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:11,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658683505] [2022-02-11 00:50:11,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:11,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:11,063 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) [2022-02-11 00:50:11,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-11 00:50:11,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:50:11,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:11,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:50:11,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:11,508 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-11 00:50:11,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2022-02-11 00:50:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:11,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:12,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:12,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:12,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:12,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-11 00:50:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:12,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658683505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:12,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:12,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-02-11 00:50:12,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263402409] [2022-02-11 00:50:12,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:12,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:50:12,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:12,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:50:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:50:12,461 INFO L87 Difference]: Start difference. First operand 3170 states and 8027 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:15,537 INFO L93 Difference]: Finished difference Result 4890 states and 12392 transitions. [2022-02-11 00:50:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:50:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:15,546 INFO L225 Difference]: With dead ends: 4890 [2022-02-11 00:50:15,546 INFO L226 Difference]: Without dead ends: 4870 [2022-02-11 00:50:15,546 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=792, Invalid=4610, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:50:15,546 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 381 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2752 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:15,547 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 161 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 906 Invalid, 0 Unknown, 2752 Unchecked, 0.5s Time] [2022-02-11 00:50:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-02-11 00:50:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 3209. [2022-02-11 00:50:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.535224438902743) internal successors, (8133), 3208 states have internal predecessors, (8133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 8133 transitions. [2022-02-11 00:50:15,601 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 8133 transitions. Word has length 30 [2022-02-11 00:50:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:15,601 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 8133 transitions. [2022-02-11 00:50:15,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 8133 transitions. [2022-02-11 00:50:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:15,605 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:15,606 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:15,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:15,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:15,822 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash -593616036, now seen corresponding path program 67 times [2022-02-11 00:50:15,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:15,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870834538] [2022-02-11 00:50:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:16,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:16,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870834538] [2022-02-11 00:50:16,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870834538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:16,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338833298] [2022-02-11 00:50:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:16,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:16,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:16,127 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) [2022-02-11 00:50:16,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-11 00:50:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:16,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:16,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:50:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:16,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:16,770 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:16,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:16,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:16,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:50:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:16,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338833298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:16,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:16,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:50:16,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744575981] [2022-02-11 00:50:16,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:16,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:16,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:16,910 INFO L87 Difference]: Start difference. First operand 3209 states and 8133 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:18,708 INFO L93 Difference]: Finished difference Result 5129 states and 12973 transitions. [2022-02-11 00:50:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 00:50:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:18,715 INFO L225 Difference]: With dead ends: 5129 [2022-02-11 00:50:18,716 INFO L226 Difference]: Without dead ends: 5107 [2022-02-11 00:50:18,716 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=2705, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 00:50:18,716 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 291 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:18,716 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 235 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:50:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5107 states. [2022-02-11 00:50:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5107 to 3179. [2022-02-11 00:50:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.5324103209565765) internal successors, (8048), 3178 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 8048 transitions. [2022-02-11 00:50:18,764 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 8048 transitions. Word has length 30 [2022-02-11 00:50:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:18,764 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 8048 transitions. [2022-02-11 00:50:18,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 8048 transitions. [2022-02-11 00:50:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:18,768 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:18,768 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:18,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:18,981 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,SelfDestructingSolverStorable227 [2022-02-11 00:50:18,981 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1108140126, now seen corresponding path program 68 times [2022-02-11 00:50:18,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:18,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222529315] [2022-02-11 00:50:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:18,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:19,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:19,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222529315] [2022-02-11 00:50:19,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222529315] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:19,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453315375] [2022-02-11 00:50:19,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:19,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:19,305 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) [2022-02-11 00:50:19,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-11 00:50:19,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:19,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:19,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:19,657 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:50:19,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 48 [2022-02-11 00:50:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:19,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:19,904 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:19,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:19,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:19,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:19,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:50:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:20,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453315375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:20,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:20,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:50:20,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791151395] [2022-02-11 00:50:20,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:20,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:50:20,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:20,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:50:20,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:50:20,004 INFO L87 Difference]: Start difference. First operand 3179 states and 8048 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:21,389 INFO L93 Difference]: Finished difference Result 5229 states and 13160 transitions. [2022-02-11 00:50:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 00:50:21,389 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:21,397 INFO L225 Difference]: With dead ends: 5229 [2022-02-11 00:50:21,397 INFO L226 Difference]: Without dead ends: 5218 [2022-02-11 00:50:21,397 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=2377, Unknown=0, NotChecked=0, Total=2756 [2022-02-11 00:50:21,398 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 380 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:21,398 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 270 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:50:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2022-02-11 00:50:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 3176. [2022-02-11 00:50:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 2.5325984251968503) internal successors, (8041), 3175 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 8041 transitions. [2022-02-11 00:50:21,460 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 8041 transitions. Word has length 30 [2022-02-11 00:50:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:21,460 INFO L470 AbstractCegarLoop]: Abstraction has 3176 states and 8041 transitions. [2022-02-11 00:50:21,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 8041 transitions. [2022-02-11 00:50:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:21,464 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:21,464 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:21,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:21,666 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,SelfDestructingSolverStorable228 [2022-02-11 00:50:21,666 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1907308062, now seen corresponding path program 69 times [2022-02-11 00:50:21,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:21,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542215194] [2022-02-11 00:50:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:21,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:21,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:21,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542215194] [2022-02-11 00:50:21,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542215194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:21,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555139594] [2022-02-11 00:50:21,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:21,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:21,940 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) [2022-02-11 00:50:21,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-11 00:50:21,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:50:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:21,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:50:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:22,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:22,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-02-11 00:50:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:22,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:23,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:23,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 45 [2022-02-11 00:50:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:23,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555139594] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:23,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:23,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-02-11 00:50:23,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565658028] [2022-02-11 00:50:23,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:23,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 00:50:23,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 00:50:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 00:50:23,453 INFO L87 Difference]: Start difference. First operand 3176 states and 8041 transitions. Second operand has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:28,794 INFO L93 Difference]: Finished difference Result 6599 states and 16665 transitions. [2022-02-11 00:50:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-11 00:50:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:28,803 INFO L225 Difference]: With dead ends: 6599 [2022-02-11 00:50:28,803 INFO L226 Difference]: Without dead ends: 6566 [2022-02-11 00:50:28,803 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5156 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2505, Invalid=12257, Unknown=0, NotChecked=0, Total=14762 [2022-02-11 00:50:28,803 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 637 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1328 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:28,804 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 194 Invalid, 3597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1858 Invalid, 0 Unknown, 1328 Unchecked, 1.0s Time] [2022-02-11 00:50:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2022-02-11 00:50:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 3218. [2022-02-11 00:50:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 2.5331053776810695) internal successors, (8149), 3217 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 8149 transitions. [2022-02-11 00:50:28,850 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 8149 transitions. Word has length 30 [2022-02-11 00:50:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:28,850 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 8149 transitions. [2022-02-11 00:50:28,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 8149 transitions. [2022-02-11 00:50:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:28,853 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:28,853 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:28,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:29,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:29,070 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1286820926, now seen corresponding path program 70 times [2022-02-11 00:50:29,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:29,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454227460] [2022-02-11 00:50:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:29,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:29,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:29,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454227460] [2022-02-11 00:50:29,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454227460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:29,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682108889] [2022-02-11 00:50:29,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:29,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:29,274 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) [2022-02-11 00:50:29,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-11 00:50:29,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:29,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:29,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:50:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:29,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:29,699 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:29,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:29,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:29,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:29,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:29,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:50:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:29,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682108889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:29,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:29,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:50:29,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830366286] [2022-02-11 00:50:29,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:29,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:50:29,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:50:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:50:29,768 INFO L87 Difference]: Start difference. First operand 3218 states and 8149 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:32,971 INFO L93 Difference]: Finished difference Result 6381 states and 16116 transitions. [2022-02-11 00:50:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-11 00:50:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:32,982 INFO L225 Difference]: With dead ends: 6381 [2022-02-11 00:50:32,982 INFO L226 Difference]: Without dead ends: 6352 [2022-02-11 00:50:32,983 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1645, Invalid=11465, Unknown=0, NotChecked=0, Total=13110 [2022-02-11 00:50:32,983 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 648 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:32,983 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 214 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2677 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:50:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6352 states. [2022-02-11 00:50:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6352 to 3264. [2022-02-11 00:50:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.535090407600368) internal successors, (8272), 3263 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8272 transitions. [2022-02-11 00:50:33,035 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8272 transitions. Word has length 30 [2022-02-11 00:50:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:33,035 INFO L470 AbstractCegarLoop]: Abstraction has 3264 states and 8272 transitions. [2022-02-11 00:50:33,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8272 transitions. [2022-02-11 00:50:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:33,039 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:33,039 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:33,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:33,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:33,251 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:33,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1952024094, now seen corresponding path program 71 times [2022-02-11 00:50:33,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:33,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114065068] [2022-02-11 00:50:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:33,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:33,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:33,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114065068] [2022-02-11 00:50:33,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114065068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:33,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775426073] [2022-02-11 00:50:33,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:33,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:33,454 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) [2022-02-11 00:50:33,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-11 00:50:33,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:50:33,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:33,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:33,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:50:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:33,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:33,862 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:33,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:33,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:33,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:33,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:33,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:50:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:33,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775426073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:33,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:33,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:50:33,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561759279] [2022-02-11 00:50:33,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:33,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:33,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:33,935 INFO L87 Difference]: Start difference. First operand 3264 states and 8272 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:35,737 INFO L93 Difference]: Finished difference Result 5279 states and 13360 transitions. [2022-02-11 00:50:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:50:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:35,745 INFO L225 Difference]: With dead ends: 5279 [2022-02-11 00:50:35,745 INFO L226 Difference]: Without dead ends: 5251 [2022-02-11 00:50:35,746 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=696, Invalid=4854, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:50:35,746 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 470 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:35,746 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 167 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:50:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2022-02-11 00:50:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3274. [2022-02-11 00:50:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3274 states, 3273 states have (on average 2.533761075465933) internal successors, (8293), 3273 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3274 states to 3274 states and 8293 transitions. [2022-02-11 00:50:35,810 INFO L78 Accepts]: Start accepts. Automaton has 3274 states and 8293 transitions. Word has length 30 [2022-02-11 00:50:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:35,810 INFO L470 AbstractCegarLoop]: Abstraction has 3274 states and 8293 transitions. [2022-02-11 00:50:35,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3274 states and 8293 transitions. [2022-02-11 00:50:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:35,813 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:35,813 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:35,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:36,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:36,029 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:36,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1920613664, now seen corresponding path program 72 times [2022-02-11 00:50:36,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:36,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72222816] [2022-02-11 00:50:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:36,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:36,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:36,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72222816] [2022-02-11 00:50:36,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72222816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:36,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249249209] [2022-02-11 00:50:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:36,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:36,247 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) [2022-02-11 00:50:36,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-11 00:50:36,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:50:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:36,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 00:50:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:36,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:36,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:50:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:36,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:36,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:36,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:36,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:50:36,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-02-11 00:50:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:37,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249249209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:37,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:37,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-11 00:50:37,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146215253] [2022-02-11 00:50:37,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:37,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-11 00:50:37,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:37,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-11 00:50:37,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-02-11 00:50:37,043 INFO L87 Difference]: Start difference. First operand 3274 states and 8293 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:39,246 INFO L93 Difference]: Finished difference Result 5594 states and 14277 transitions. [2022-02-11 00:50:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-11 00:50:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:39,254 INFO L225 Difference]: With dead ends: 5594 [2022-02-11 00:50:39,254 INFO L226 Difference]: Without dead ends: 5583 [2022-02-11 00:50:39,255 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=947, Invalid=6193, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 00:50:39,255 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 413 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2072 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:39,255 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 139 Invalid, 3451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1177 Invalid, 0 Unknown, 2072 Unchecked, 0.4s Time] [2022-02-11 00:50:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2022-02-11 00:50:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 3342. [2022-02-11 00:50:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 2.5372642921281052) internal successors, (8477), 3341 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 8477 transitions. [2022-02-11 00:50:39,306 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 8477 transitions. Word has length 30 [2022-02-11 00:50:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:39,306 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 8477 transitions. [2022-02-11 00:50:39,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 8477 transitions. [2022-02-11 00:50:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:39,309 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:39,309 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:39,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:39,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-11 00:50:39,525 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash -164212614, now seen corresponding path program 73 times [2022-02-11 00:50:39,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:39,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947398613] [2022-02-11 00:50:39,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:39,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:39,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:39,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947398613] [2022-02-11 00:50:39,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947398613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:39,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994630349] [2022-02-11 00:50:39,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:50:39,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:39,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:39,823 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) [2022-02-11 00:50:39,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-11 00:50:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:39,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:40,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:50:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:40,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:40,361 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:40,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:40,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:50:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:40,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994630349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:40,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:40,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:50:40,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406635911] [2022-02-11 00:50:40,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:40,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:50:40,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:40,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:50:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:50:40,446 INFO L87 Difference]: Start difference. First operand 3342 states and 8477 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:42,773 INFO L93 Difference]: Finished difference Result 5259 states and 13386 transitions. [2022-02-11 00:50:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:50:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:42,780 INFO L225 Difference]: With dead ends: 5259 [2022-02-11 00:50:42,780 INFO L226 Difference]: Without dead ends: 5244 [2022-02-11 00:50:42,781 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=603, Invalid=4947, Unknown=0, NotChecked=0, Total=5550 [2022-02-11 00:50:42,781 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 376 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:42,781 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 194 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:50:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2022-02-11 00:50:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 3345. [2022-02-11 00:50:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 2.537081339712919) internal successors, (8484), 3344 states have internal predecessors, (8484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 8484 transitions. [2022-02-11 00:50:42,827 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 8484 transitions. Word has length 30 [2022-02-11 00:50:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:42,827 INFO L470 AbstractCegarLoop]: Abstraction has 3345 states and 8484 transitions. [2022-02-11 00:50:42,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 8484 transitions. [2022-02-11 00:50:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:42,830 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:42,830 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:42,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:43,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-11 00:50:43,047 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash 371231594, now seen corresponding path program 74 times [2022-02-11 00:50:43,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:43,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84812108] [2022-02-11 00:50:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:43,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:43,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84812108] [2022-02-11 00:50:43,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84812108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:43,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801168363] [2022-02-11 00:50:43,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:50:43,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:43,257 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) [2022-02-11 00:50:43,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-11 00:50:43,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:50:43,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:43,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:43,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:43,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:50:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:43,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:43,749 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:43,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:43,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:43,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:50:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:43,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801168363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:43,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:43,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:50:43,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179530992] [2022-02-11 00:50:43,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:43,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:50:43,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:50:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:50:43,816 INFO L87 Difference]: Start difference. First operand 3345 states and 8484 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:45,618 INFO L93 Difference]: Finished difference Result 5212 states and 13247 transitions. [2022-02-11 00:50:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:50:45,618 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:45,626 INFO L225 Difference]: With dead ends: 5212 [2022-02-11 00:50:45,626 INFO L226 Difference]: Without dead ends: 5202 [2022-02-11 00:50:45,627 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=3987, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 00:50:45,627 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 354 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 3146 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:45,627 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 240 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3146 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:50:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2022-02-11 00:50:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3344. [2022-02-11 00:50:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 2.537241998205205) internal successors, (8482), 3343 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 8482 transitions. [2022-02-11 00:50:45,674 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 8482 transitions. Word has length 30 [2022-02-11 00:50:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:45,674 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 8482 transitions. [2022-02-11 00:50:45,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 8482 transitions. [2022-02-11 00:50:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:45,678 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:45,678 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:45,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:45,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:45,893 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1611738628, now seen corresponding path program 75 times [2022-02-11 00:50:45,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:45,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144924198] [2022-02-11 00:50:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:46,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:46,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144924198] [2022-02-11 00:50:46,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144924198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:46,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969822788] [2022-02-11 00:50:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:50:46,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:46,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:46,113 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) [2022-02-11 00:50:46,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-11 00:50:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:50:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:46,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:46,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:50:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:46,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:46,520 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:46,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:46,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:46,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:46,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:50:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:46,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969822788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:46,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:46,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:50:46,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035725036] [2022-02-11 00:50:46,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:46,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:46,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:46,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:46,604 INFO L87 Difference]: Start difference. First operand 3344 states and 8482 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:50,513 INFO L93 Difference]: Finished difference Result 6969 states and 17830 transitions. [2022-02-11 00:50:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-11 00:50:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:50,524 INFO L225 Difference]: With dead ends: 6969 [2022-02-11 00:50:50,524 INFO L226 Difference]: Without dead ends: 6941 [2022-02-11 00:50:50,525 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3501 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1191, Invalid=9315, Unknown=0, NotChecked=0, Total=10506 [2022-02-11 00:50:50,525 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 496 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 2867 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:50,525 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 198 Invalid, 3126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2867 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:50:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2022-02-11 00:50:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 3320. [2022-02-11 00:50:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 2.5366074118710453) internal successors, (8419), 3319 states have internal predecessors, (8419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8419 transitions. [2022-02-11 00:50:50,594 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8419 transitions. Word has length 30 [2022-02-11 00:50:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:50,594 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8419 transitions. [2022-02-11 00:50:50,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8419 transitions. [2022-02-11 00:50:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:50,608 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:50,608 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:50,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:50,823 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,SelfDestructingSolverStorable235 [2022-02-11 00:50:50,824 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1590653014, now seen corresponding path program 76 times [2022-02-11 00:50:50,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:50,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905238833] [2022-02-11 00:50:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:50,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:51,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:51,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905238833] [2022-02-11 00:50:51,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905238833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:51,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191426585] [2022-02-11 00:50:51,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:50:51,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:51,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:51,079 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) [2022-02-11 00:50:51,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-11 00:50:51,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:50:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:51,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:51,406 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:50:51,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-11 00:50:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:51,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:51,665 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:51,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:51,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:51,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:51,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:50:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:51,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191426585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:51,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:51,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:50:51,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069404845] [2022-02-11 00:50:51,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:51,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:50:51,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:50:51,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:50:51,756 INFO L87 Difference]: Start difference. First operand 3320 states and 8419 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:54,826 INFO L93 Difference]: Finished difference Result 5777 states and 14697 transitions. [2022-02-11 00:50:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-11 00:50:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:54,835 INFO L225 Difference]: With dead ends: 5777 [2022-02-11 00:50:54,835 INFO L226 Difference]: Without dead ends: 5758 [2022-02-11 00:50:54,835 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=873, Invalid=6267, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 00:50:54,836 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 483 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:54,836 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 236 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:50:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2022-02-11 00:50:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 3337. [2022-02-11 00:50:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 2.5365707434052758) internal successors, (8462), 3336 states have internal predecessors, (8462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 8462 transitions. [2022-02-11 00:50:54,890 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 8462 transitions. Word has length 30 [2022-02-11 00:50:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:54,890 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 8462 transitions. [2022-02-11 00:50:54,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 8462 transitions. [2022-02-11 00:50:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:54,894 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:54,894 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:54,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-02-11 00:50:55,110 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,SelfDestructingSolverStorable236 [2022-02-11 00:50:55,110 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:55,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:55,110 INFO L85 PathProgramCache]: Analyzing trace with hash -947913232, now seen corresponding path program 77 times [2022-02-11 00:50:55,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:55,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790862992] [2022-02-11 00:50:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:55,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:55,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790862992] [2022-02-11 00:50:55,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790862992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:55,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95258896] [2022-02-11 00:50:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:50:55,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:55,397 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) [2022-02-11 00:50:55,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-11 00:50:55,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:50:55,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:55,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:55,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:50:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:55,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:55,946 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:55,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:56,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:56,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:56,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:50:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:56,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95258896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:56,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:56,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:50:56,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85584488] [2022-02-11 00:50:56,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:56,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:50:56,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:50:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:50:56,045 INFO L87 Difference]: Start difference. First operand 3337 states and 8462 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:50:58,541 INFO L93 Difference]: Finished difference Result 5431 states and 13818 transitions. [2022-02-11 00:50:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:50:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:50:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:50:58,549 INFO L225 Difference]: With dead ends: 5431 [2022-02-11 00:50:58,549 INFO L226 Difference]: Without dead ends: 5410 [2022-02-11 00:50:58,549 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=796, Invalid=5846, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 00:50:58,549 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 472 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:50:58,549 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 212 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:50:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2022-02-11 00:50:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 3339. [2022-02-11 00:50:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 2.536249251048532) internal successors, (8466), 3338 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 8466 transitions. [2022-02-11 00:50:58,598 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 8466 transitions. Word has length 30 [2022-02-11 00:50:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:50:58,598 INFO L470 AbstractCegarLoop]: Abstraction has 3339 states and 8466 transitions. [2022-02-11 00:50:58,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:50:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 8466 transitions. [2022-02-11 00:50:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:50:58,602 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:50:58,602 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:50:58,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-02-11 00:50:58,818 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,SelfDestructingSolverStorable237 [2022-02-11 00:50:58,818 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:50:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:50:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash -412469024, now seen corresponding path program 78 times [2022-02-11 00:50:58,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:50:58,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420273058] [2022-02-11 00:50:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:50:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:50:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:50:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:59,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:50:59,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420273058] [2022-02-11 00:50:59,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420273058] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:50:59,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871618286] [2022-02-11 00:50:59,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:50:59,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:50:59,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:50:59,003 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) [2022-02-11 00:50:59,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-11 00:50:59,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:50:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:50:59,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:50:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:50:59,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-02-11 00:50:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:59,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:50:59,542 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:50:59,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:50:59,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:59,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:50:59,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:50:59,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:50:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:50:59,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871618286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:50:59,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:50:59,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:50:59,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293288732] [2022-02-11 00:50:59,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:50:59,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:50:59,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:50:59,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:50:59,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:50:59,621 INFO L87 Difference]: Start difference. First operand 3339 states and 8466 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:01,845 INFO L93 Difference]: Finished difference Result 5258 states and 13355 transitions. [2022-02-11 00:51:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 00:51:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:01,853 INFO L225 Difference]: With dead ends: 5258 [2022-02-11 00:51:01,853 INFO L226 Difference]: Without dead ends: 5248 [2022-02-11 00:51:01,854 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=564, Invalid=4406, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 00:51:01,854 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 427 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:01,854 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 235 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:51:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2022-02-11 00:51:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 3336. [2022-02-11 00:51:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.536431784107946) internal successors, (8459), 3335 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8459 transitions. [2022-02-11 00:51:01,918 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8459 transitions. Word has length 30 [2022-02-11 00:51:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:01,918 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 8459 transitions. [2022-02-11 00:51:01,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8459 transitions. [2022-02-11 00:51:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:01,923 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:01,923 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:01,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:02,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-02-11 00:51:02,139 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:02,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:02,140 INFO L85 PathProgramCache]: Analyzing trace with hash -7722886, now seen corresponding path program 79 times [2022-02-11 00:51:02,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:02,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145750502] [2022-02-11 00:51:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:02,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:02,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145750502] [2022-02-11 00:51:02,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145750502] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:02,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811440133] [2022-02-11 00:51:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:02,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:02,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:02,344 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) [2022-02-11 00:51:02,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-11 00:51:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:02,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:02,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:02,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:51:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:02,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:02,805 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:02,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:02,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:02,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:02,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:02,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811440133] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:02,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:02,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:51:02,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922673419] [2022-02-11 00:51:02,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:02,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:51:02,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:51:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:51:02,879 INFO L87 Difference]: Start difference. First operand 3336 states and 8459 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:04,573 INFO L93 Difference]: Finished difference Result 5235 states and 13294 transitions. [2022-02-11 00:51:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 00:51:04,574 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:04,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:04,582 INFO L225 Difference]: With dead ends: 5235 [2022-02-11 00:51:04,582 INFO L226 Difference]: Without dead ends: 5225 [2022-02-11 00:51:04,582 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=3636, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:51:04,582 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 339 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:04,582 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 321 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2961 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:51:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2022-02-11 00:51:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 3329. [2022-02-11 00:51:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 3328 states have (on average 2.5360576923076925) internal successors, (8440), 3328 states have internal predecessors, (8440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 8440 transitions. [2022-02-11 00:51:04,635 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 8440 transitions. Word has length 30 [2022-02-11 00:51:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:04,635 INFO L470 AbstractCegarLoop]: Abstraction has 3329 states and 8440 transitions. [2022-02-11 00:51:04,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 8440 transitions. [2022-02-11 00:51:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:04,639 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:04,639 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:04,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:04,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:04,855 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash 40851758, now seen corresponding path program 80 times [2022-02-11 00:51:04,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:04,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435207098] [2022-02-11 00:51:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:04,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:05,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:05,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435207098] [2022-02-11 00:51:05,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435207098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:05,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115431313] [2022-02-11 00:51:05,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:05,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:05,056 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) [2022-02-11 00:51:05,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-11 00:51:05,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:05,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:05,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:05,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:51:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:05,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:05,514 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:05,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:05,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:05,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:05,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:05,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:51:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:05,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115431313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:05,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:05,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:51:05,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918609277] [2022-02-11 00:51:05,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:05,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:51:05,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:51:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:51:05,586 INFO L87 Difference]: Start difference. First operand 3329 states and 8440 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:07,657 INFO L93 Difference]: Finished difference Result 5478 states and 13808 transitions. [2022-02-11 00:51:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:51:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:07,666 INFO L225 Difference]: With dead ends: 5478 [2022-02-11 00:51:07,666 INFO L226 Difference]: Without dead ends: 5448 [2022-02-11 00:51:07,666 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=663, Invalid=4167, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 00:51:07,666 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 474 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:07,667 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 275 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:51:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2022-02-11 00:51:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 3315. [2022-02-11 00:51:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.535003017501509) internal successors, (8401), 3314 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8401 transitions. [2022-02-11 00:51:07,725 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8401 transitions. Word has length 30 [2022-02-11 00:51:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:07,725 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 8401 transitions. [2022-02-11 00:51:07,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8401 transitions. [2022-02-11 00:51:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:07,729 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:07,729 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:07,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-02-11 00:51:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:07,943 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash 85567790, now seen corresponding path program 81 times [2022-02-11 00:51:07,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:07,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147917017] [2022-02-11 00:51:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:08,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:08,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147917017] [2022-02-11 00:51:08,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147917017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:08,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649950751] [2022-02-11 00:51:08,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:08,254 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) [2022-02-11 00:51:08,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-11 00:51:08,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:51:08,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:08,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:08,628 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:51:08,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-11 00:51:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:08,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:08,908 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:08,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:08,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:08,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:08,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:09,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649950751] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:09,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:09,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:51:09,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194376604] [2022-02-11 00:51:09,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:09,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:51:09,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:09,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:51:09,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:51:09,012 INFO L87 Difference]: Start difference. First operand 3315 states and 8401 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:11,368 INFO L93 Difference]: Finished difference Result 5232 states and 13255 transitions. [2022-02-11 00:51:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 00:51:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:11,375 INFO L225 Difference]: With dead ends: 5232 [2022-02-11 00:51:11,375 INFO L226 Difference]: Without dead ends: 5213 [2022-02-11 00:51:11,376 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=649, Invalid=4753, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:51:11,376 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 455 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:11,376 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 185 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:51:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5213 states. [2022-02-11 00:51:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5213 to 3313. [2022-02-11 00:51:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.5344202898550723) internal successors, (8394), 3312 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 8394 transitions. [2022-02-11 00:51:11,421 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 8394 transitions. Word has length 30 [2022-02-11 00:51:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:11,421 INFO L470 AbstractCegarLoop]: Abstraction has 3313 states and 8394 transitions. [2022-02-11 00:51:11,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 8394 transitions. [2022-02-11 00:51:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:11,425 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:11,425 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:11,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:11,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2022-02-11 00:51:11,640 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash 507897328, now seen corresponding path program 82 times [2022-02-11 00:51:11,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:11,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699821913] [2022-02-11 00:51:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:11,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:11,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:11,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699821913] [2022-02-11 00:51:11,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699821913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:11,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312498641] [2022-02-11 00:51:11,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:11,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:11,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:11,841 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) [2022-02-11 00:51:11,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-11 00:51:11,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:11,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:11,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:12,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:51:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:12,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:12,317 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:12,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:12,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:12,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:51:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:12,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312498641] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:12,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:12,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:51:12,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43514562] [2022-02-11 00:51:12,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:12,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:51:12,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:51:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:51:12,427 INFO L87 Difference]: Start difference. First operand 3313 states and 8394 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:14,866 INFO L93 Difference]: Finished difference Result 6153 states and 15686 transitions. [2022-02-11 00:51:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 00:51:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:14,874 INFO L225 Difference]: With dead ends: 6153 [2022-02-11 00:51:14,875 INFO L226 Difference]: Without dead ends: 6134 [2022-02-11 00:51:14,875 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=755, Invalid=5887, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 00:51:14,875 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 445 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:14,875 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 195 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:51:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2022-02-11 00:51:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 3315. [2022-02-11 00:51:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.5343995171997586) internal successors, (8399), 3314 states have internal predecessors, (8399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8399 transitions. [2022-02-11 00:51:14,930 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8399 transitions. Word has length 30 [2022-02-11 00:51:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:14,930 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 8399 transitions. [2022-02-11 00:51:14,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8399 transitions. [2022-02-11 00:51:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:14,934 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:14,934 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:14,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:15,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:15,147 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2030668918, now seen corresponding path program 83 times [2022-02-11 00:51:15,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:15,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850706610] [2022-02-11 00:51:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:15,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:15,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850706610] [2022-02-11 00:51:15,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850706610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:15,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268595368] [2022-02-11 00:51:15,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:15,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:15,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:15,347 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) [2022-02-11 00:51:15,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-11 00:51:15,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:51:15,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:15,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:15,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:51:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:15,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:15,796 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:15,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:15,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:15,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:15,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:15,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268595368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:15,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:15,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:51:15,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73359183] [2022-02-11 00:51:15,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:15,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:51:15,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:15,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:51:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:51:15,872 INFO L87 Difference]: Start difference. First operand 3315 states and 8399 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:17,698 INFO L93 Difference]: Finished difference Result 5244 states and 13339 transitions. [2022-02-11 00:51:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-11 00:51:17,698 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:17,722 INFO L225 Difference]: With dead ends: 5244 [2022-02-11 00:51:17,722 INFO L226 Difference]: Without dead ends: 5223 [2022-02-11 00:51:17,723 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=615, Invalid=5237, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:51:17,723 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 355 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:17,723 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 197 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:51:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2022-02-11 00:51:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 3316. [2022-02-11 00:51:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 2.534238310708899) internal successors, (8401), 3315 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 8401 transitions. [2022-02-11 00:51:17,776 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 8401 transitions. Word has length 30 [2022-02-11 00:51:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:17,776 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 8401 transitions. [2022-02-11 00:51:17,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 8401 transitions. [2022-02-11 00:51:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:17,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:17,780 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:17,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:17,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:17,996 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1495224710, now seen corresponding path program 84 times [2022-02-11 00:51:17,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:17,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125007876] [2022-02-11 00:51:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:18,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:18,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125007876] [2022-02-11 00:51:18,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125007876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:18,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216985518] [2022-02-11 00:51:18,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:18,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:18,181 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) [2022-02-11 00:51:18,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-11 00:51:18,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:51:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:18,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:51:18,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:18,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:18,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:18,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:51:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:18,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:19,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:19,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:19,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:51:19,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 60 [2022-02-11 00:51:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:19,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216985518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:19,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:19,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-02-11 00:51:19,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341294645] [2022-02-11 00:51:19,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:19,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 00:51:19,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 00:51:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 00:51:19,194 INFO L87 Difference]: Start difference. First operand 3316 states and 8401 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:21,665 INFO L93 Difference]: Finished difference Result 5472 states and 13960 transitions. [2022-02-11 00:51:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 00:51:21,666 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:21,674 INFO L225 Difference]: With dead ends: 5472 [2022-02-11 00:51:21,674 INFO L226 Difference]: Without dead ends: 5462 [2022-02-11 00:51:21,674 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=735, Invalid=5117, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:51:21,674 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 441 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2285 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:21,675 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 174 Invalid, 3923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1383 Invalid, 0 Unknown, 2285 Unchecked, 0.7s Time] [2022-02-11 00:51:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2022-02-11 00:51:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 3389. [2022-02-11 00:51:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3388 states have (on average 2.5374852420306966) internal successors, (8597), 3388 states have internal predecessors, (8597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 8597 transitions. [2022-02-11 00:51:21,725 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 8597 transitions. Word has length 30 [2022-02-11 00:51:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:21,725 INFO L470 AbstractCegarLoop]: Abstraction has 3389 states and 8597 transitions. [2022-02-11 00:51:21,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 8597 transitions. [2022-02-11 00:51:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:21,729 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:21,729 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:21,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-02-11 00:51:21,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:21,943 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:21,943 INFO L85 PathProgramCache]: Analyzing trace with hash 680298034, now seen corresponding path program 85 times [2022-02-11 00:51:21,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:21,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581938860] [2022-02-11 00:51:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:22,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:22,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581938860] [2022-02-11 00:51:22,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581938860] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:22,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424231108] [2022-02-11 00:51:22,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:22,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:22,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:22,246 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) [2022-02-11 00:51:22,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-11 00:51:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:22,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:22,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:51:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:22,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:22,861 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:22,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:22,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:22,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:22,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424231108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:22,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:22,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:51:22,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312314210] [2022-02-11 00:51:22,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:22,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:51:22,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:51:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:51:22,975 INFO L87 Difference]: Start difference. First operand 3389 states and 8597 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:25,295 INFO L93 Difference]: Finished difference Result 5578 states and 14153 transitions. [2022-02-11 00:51:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 00:51:25,296 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:25,304 INFO L225 Difference]: With dead ends: 5578 [2022-02-11 00:51:25,304 INFO L226 Difference]: Without dead ends: 5555 [2022-02-11 00:51:25,305 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=561, Invalid=4131, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:51:25,305 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 375 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:25,305 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 201 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:51:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5555 states. [2022-02-11 00:51:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5555 to 3408. [2022-02-11 00:51:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3408 states, 3407 states have (on average 2.53742295274435) internal successors, (8645), 3407 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 8645 transitions. [2022-02-11 00:51:25,360 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 8645 transitions. Word has length 30 [2022-02-11 00:51:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:25,360 INFO L470 AbstractCegarLoop]: Abstraction has 3408 states and 8645 transitions. [2022-02-11 00:51:25,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 8645 transitions. [2022-02-11 00:51:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:25,365 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:25,365 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:25,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-02-11 00:51:25,565 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,SelfDestructingSolverStorable245 [2022-02-11 00:51:25,565 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash -570465176, now seen corresponding path program 86 times [2022-02-11 00:51:25,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:25,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086779237] [2022-02-11 00:51:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:25,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:25,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086779237] [2022-02-11 00:51:25,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086779237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:25,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51460635] [2022-02-11 00:51:25,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:25,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:25,879 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) [2022-02-11 00:51:25,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-11 00:51:25,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:25,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:26,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:51:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:26,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:26,552 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:26,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:26,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:26,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:26,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:51:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:26,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51460635] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:26,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:26,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:51:26,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529889976] [2022-02-11 00:51:26,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:26,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:51:26,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:51:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:51:26,671 INFO L87 Difference]: Start difference. First operand 3408 states and 8645 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:28,614 INFO L93 Difference]: Finished difference Result 5638 states and 14209 transitions. [2022-02-11 00:51:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-11 00:51:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:28,621 INFO L225 Difference]: With dead ends: 5638 [2022-02-11 00:51:28,621 INFO L226 Difference]: Without dead ends: 5627 [2022-02-11 00:51:28,621 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=462, Invalid=3198, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 00:51:28,622 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 391 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:28,622 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 316 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:51:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5627 states. [2022-02-11 00:51:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5627 to 3408. [2022-02-11 00:51:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3408 states, 3407 states have (on average 2.53742295274435) internal successors, (8645), 3407 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3408 states to 3408 states and 8645 transitions. [2022-02-11 00:51:28,669 INFO L78 Accepts]: Start accepts. Automaton has 3408 states and 8645 transitions. Word has length 30 [2022-02-11 00:51:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:28,669 INFO L470 AbstractCegarLoop]: Abstraction has 3408 states and 8645 transitions. [2022-02-11 00:51:28,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3408 states and 8645 transitions. [2022-02-11 00:51:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:28,673 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:28,673 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:28,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:28,889 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,SelfDestructingSolverStorable246 [2022-02-11 00:51:28,890 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1066391498, now seen corresponding path program 82 times [2022-02-11 00:51:28,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:28,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247737388] [2022-02-11 00:51:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:29,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:29,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247737388] [2022-02-11 00:51:29,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247737388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:29,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254398415] [2022-02-11 00:51:29,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:29,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:29,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:29,138 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) [2022-02-11 00:51:29,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-11 00:51:29,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:29,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:29,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:29,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:29,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:51:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:29,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:29,772 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:29,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:29,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:29,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:29,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:29,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254398415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:29,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:29,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:51:29,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755026725] [2022-02-11 00:51:29,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:29,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:51:29,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:51:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:51:29,867 INFO L87 Difference]: Start difference. First operand 3408 states and 8645 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:34,593 INFO L93 Difference]: Finished difference Result 5628 states and 14130 transitions. [2022-02-11 00:51:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-11 00:51:34,593 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:34,601 INFO L225 Difference]: With dead ends: 5628 [2022-02-11 00:51:34,602 INFO L226 Difference]: Without dead ends: 5606 [2022-02-11 00:51:34,602 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3930 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1255, Invalid=10517, Unknown=0, NotChecked=0, Total=11772 [2022-02-11 00:51:34,602 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 593 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 3336 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 3336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:34,602 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 206 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 3336 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 00:51:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2022-02-11 00:51:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 3396. [2022-02-11 00:51:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 2.538144329896907) internal successors, (8617), 3395 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 8617 transitions. [2022-02-11 00:51:34,653 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 8617 transitions. Word has length 30 [2022-02-11 00:51:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:34,654 INFO L470 AbstractCegarLoop]: Abstraction has 3396 states and 8617 transitions. [2022-02-11 00:51:34,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:34,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 8617 transitions. [2022-02-11 00:51:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:34,658 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:34,658 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:34,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:34,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:34,871 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash 508653024, now seen corresponding path program 87 times [2022-02-11 00:51:34,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:34,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784230439] [2022-02-11 00:51:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:35,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:35,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784230439] [2022-02-11 00:51:35,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784230439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:35,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632069894] [2022-02-11 00:51:35,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:35,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:35,145 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) [2022-02-11 00:51:35,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-11 00:51:35,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:51:35,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:35,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:35,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:51:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:35,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:35,802 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:35,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:35,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:35,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:35,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:35,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632069894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:35,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:35,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:51:35,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702874015] [2022-02-11 00:51:35,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:35,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:51:35,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:35,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:51:35,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:51:35,933 INFO L87 Difference]: Start difference. First operand 3396 states and 8617 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:38,384 INFO L93 Difference]: Finished difference Result 5324 states and 13524 transitions. [2022-02-11 00:51:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:51:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:38,392 INFO L225 Difference]: With dead ends: 5324 [2022-02-11 00:51:38,392 INFO L226 Difference]: Without dead ends: 5314 [2022-02-11 00:51:38,393 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=435, Invalid=4121, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:51:38,393 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:38,393 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 274 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:51:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2022-02-11 00:51:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 3382. [2022-02-11 00:51:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 2.538893818396924) internal successors, (8584), 3381 states have internal predecessors, (8584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 8584 transitions. [2022-02-11 00:51:38,452 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 8584 transitions. Word has length 30 [2022-02-11 00:51:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:38,452 INFO L470 AbstractCegarLoop]: Abstraction has 3382 states and 8584 transitions. [2022-02-11 00:51:38,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 8584 transitions. [2022-02-11 00:51:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:38,456 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:38,456 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:38,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:38,671 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 279347744, now seen corresponding path program 83 times [2022-02-11 00:51:38,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:38,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900873931] [2022-02-11 00:51:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:38,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:38,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900873931] [2022-02-11 00:51:38,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900873931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:38,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669535574] [2022-02-11 00:51:38,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:38,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:38,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:38,928 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) [2022-02-11 00:51:38,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-11 00:51:38,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 00:51:38,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:38,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:39,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:51:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:39,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:39,585 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:39,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:39,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:39,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:39,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:39,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:39,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669535574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:39,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:39,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:51:39,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036911296] [2022-02-11 00:51:39,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:39,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:51:39,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:51:39,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:51:39,702 INFO L87 Difference]: Start difference. First operand 3382 states and 8584 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:41,588 INFO L93 Difference]: Finished difference Result 5812 states and 14819 transitions. [2022-02-11 00:51:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:51:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:41,596 INFO L225 Difference]: With dead ends: 5812 [2022-02-11 00:51:41,597 INFO L226 Difference]: Without dead ends: 5803 [2022-02-11 00:51:41,597 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:51:41,597 INFO L934 BasicCegarLoop]: 34 mSDtfsCounter, 237 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:41,597 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 344 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:51:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5803 states. [2022-02-11 00:51:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5803 to 3394. [2022-02-11 00:51:41,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 3393 states have (on average 2.539050987326849) internal successors, (8615), 3393 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 8615 transitions. [2022-02-11 00:51:41,647 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 8615 transitions. Word has length 30 [2022-02-11 00:51:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:41,647 INFO L470 AbstractCegarLoop]: Abstraction has 3394 states and 8615 transitions. [2022-02-11 00:51:41,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 8615 transitions. [2022-02-11 00:51:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:41,651 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:41,651 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:41,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:41,867 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,SelfDestructingSolverStorable249 [2022-02-11 00:51:41,867 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1055119168, now seen corresponding path program 84 times [2022-02-11 00:51:41,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:41,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895425911] [2022-02-11 00:51:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:41,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:42,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:42,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895425911] [2022-02-11 00:51:42,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895425911] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:42,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753633789] [2022-02-11 00:51:42,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:51:42,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:42,089 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) [2022-02-11 00:51:42,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-11 00:51:42,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:51:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:42,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:42,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:51:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:42,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:42,658 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:42,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:42,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:42,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:42,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:42,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753633789] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:42,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:42,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:51:42,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560480927] [2022-02-11 00:51:42,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:42,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:51:42,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:42,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:51:42,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:51:42,748 INFO L87 Difference]: Start difference. First operand 3394 states and 8615 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:44,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:44,618 INFO L93 Difference]: Finished difference Result 5879 states and 15019 transitions. [2022-02-11 00:51:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:51:44,618 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:44,627 INFO L225 Difference]: With dead ends: 5879 [2022-02-11 00:51:44,628 INFO L226 Difference]: Without dead ends: 5868 [2022-02-11 00:51:44,628 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=541, Invalid=3491, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:51:44,628 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 310 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:44,628 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 209 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:51:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2022-02-11 00:51:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 3421. [2022-02-11 00:51:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 2.5391812865497077) internal successors, (8684), 3420 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 8684 transitions. [2022-02-11 00:51:44,682 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 8684 transitions. Word has length 30 [2022-02-11 00:51:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:44,682 INFO L470 AbstractCegarLoop]: Abstraction has 3421 states and 8684 transitions. [2022-02-11 00:51:44,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 8684 transitions. [2022-02-11 00:51:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:44,686 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:44,686 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:44,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-02-11 00:51:44,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:44,891 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:44,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1720322336, now seen corresponding path program 85 times [2022-02-11 00:51:44,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:44,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30311358] [2022-02-11 00:51:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:44,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:45,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:45,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30311358] [2022-02-11 00:51:45,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30311358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:45,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568324261] [2022-02-11 00:51:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:51:45,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:45,172 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) [2022-02-11 00:51:45,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-11 00:51:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:45,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:45,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:45,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-11 00:51:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:45,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:45,862 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:45,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:51:45,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:45,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:45,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:45,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:45,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568324261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:45,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:45,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 30 [2022-02-11 00:51:45,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638401247] [2022-02-11 00:51:45,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:45,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:51:45,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:51:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:51:45,973 INFO L87 Difference]: Start difference. First operand 3421 states and 8684 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:47,414 INFO L93 Difference]: Finished difference Result 5585 states and 14256 transitions. [2022-02-11 00:51:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-11 00:51:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:47,438 INFO L225 Difference]: With dead ends: 5585 [2022-02-11 00:51:47,439 INFO L226 Difference]: Without dead ends: 5564 [2022-02-11 00:51:47,439 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=536, Invalid=3496, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:51:47,439 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 345 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:47,439 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 257 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2070 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:51:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2022-02-11 00:51:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 3419. [2022-02-11 00:51:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 2.5392042129900525) internal successors, (8679), 3418 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 8679 transitions. [2022-02-11 00:51:47,482 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 8679 transitions. Word has length 30 [2022-02-11 00:51:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:47,483 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 8679 transitions. [2022-02-11 00:51:47,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 8679 transitions. [2022-02-11 00:51:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:47,487 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:47,487 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:47,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:47,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:47,700 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1576391650, now seen corresponding path program 86 times [2022-02-11 00:51:47,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:47,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949641479] [2022-02-11 00:51:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:47,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:47,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:47,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949641479] [2022-02-11 00:51:47,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949641479] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:47,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055794296] [2022-02-11 00:51:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:51:47,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:47,865 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) [2022-02-11 00:51:47,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-11 00:51:47,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:51:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:47,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:48,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-02-11 00:51:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:48,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:48,288 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:48,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:48,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:48,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:48,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:48,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:48,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055794296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:48,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:48,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:51:48,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098030472] [2022-02-11 00:51:48,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:48,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:51:48,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:51:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:51:48,361 INFO L87 Difference]: Start difference. First operand 3419 states and 8679 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:49,638 INFO L93 Difference]: Finished difference Result 5853 states and 14935 transitions. [2022-02-11 00:51:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:51:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:49,647 INFO L225 Difference]: With dead ends: 5853 [2022-02-11 00:51:49,647 INFO L226 Difference]: Without dead ends: 5844 [2022-02-11 00:51:49,648 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=2826, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:51:49,648 INFO L934 BasicCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:49,648 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 292 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-11 00:51:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5844 states. [2022-02-11 00:51:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5844 to 3410. [2022-02-11 00:51:49,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.5388677031387505) internal successors, (8655), 3409 states have internal predecessors, (8655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 8655 transitions. [2022-02-11 00:51:49,700 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 8655 transitions. Word has length 30 [2022-02-11 00:51:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:49,700 INFO L470 AbstractCegarLoop]: Abstraction has 3410 states and 8655 transitions. [2022-02-11 00:51:49,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 8655 transitions. [2022-02-11 00:51:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:49,704 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:49,704 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:49,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:49,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:49,919 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash 221356764, now seen corresponding path program 87 times [2022-02-11 00:51:49,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:49,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971580377] [2022-02-11 00:51:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:50,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:50,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971580377] [2022-02-11 00:51:50,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971580377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:50,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378003653] [2022-02-11 00:51:50,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:51:50,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:50,177 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) [2022-02-11 00:51:50,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-11 00:51:50,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:51:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:50,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:50,433 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-11 00:51:50,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 76 [2022-02-11 00:51:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:50,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:50,629 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:50,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:51:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:50,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:50,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:50,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378003653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:50,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:50,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-02-11 00:51:50,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568762549] [2022-02-11 00:51:50,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:50,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 00:51:50,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:50,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 00:51:50,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-02-11 00:51:50,699 INFO L87 Difference]: Start difference. First operand 3410 states and 8655 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:52,820 INFO L93 Difference]: Finished difference Result 6137 states and 15618 transitions. [2022-02-11 00:51:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:51:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:52,829 INFO L225 Difference]: With dead ends: 6137 [2022-02-11 00:51:52,829 INFO L226 Difference]: Without dead ends: 6126 [2022-02-11 00:51:52,830 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 00:51:52,830 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 370 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:52,830 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 244 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:51:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2022-02-11 00:51:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3439. [2022-02-11 00:51:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 2.5386852821407797) internal successors, (8728), 3438 states have internal predecessors, (8728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 8728 transitions. [2022-02-11 00:51:52,879 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 8728 transitions. Word has length 30 [2022-02-11 00:51:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:52,879 INFO L470 AbstractCegarLoop]: Abstraction has 3439 states and 8728 transitions. [2022-02-11 00:51:52,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 8728 transitions. [2022-02-11 00:51:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:52,900 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:52,900 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:52,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:53,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:53,114 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1977757814, now seen corresponding path program 88 times [2022-02-11 00:51:53,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:53,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539615191] [2022-02-11 00:51:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:53,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:53,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539615191] [2022-02-11 00:51:53,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539615191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:53,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302982191] [2022-02-11 00:51:53,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:51:53,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:53,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:53,394 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) [2022-02-11 00:51:53,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-11 00:51:53,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:51:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:53,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:53,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:51:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:53,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:54,051 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:54,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:51:54,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:54,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:54,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:54,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302982191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:54,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:54,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:51:54,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142851454] [2022-02-11 00:51:54,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:54,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:51:54,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:51:54,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:51:54,157 INFO L87 Difference]: Start difference. First operand 3439 states and 8728 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:51:57,102 INFO L93 Difference]: Finished difference Result 6221 states and 15826 transitions. [2022-02-11 00:51:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-11 00:51:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:51:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:51:57,111 INFO L225 Difference]: With dead ends: 6221 [2022-02-11 00:51:57,111 INFO L226 Difference]: Without dead ends: 6177 [2022-02-11 00:51:57,112 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=828, Invalid=6312, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 00:51:57,112 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 458 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 00:51:57,112 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 278 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-11 00:51:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2022-02-11 00:51:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 3439. [2022-02-11 00:51:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 2.5378126817917392) internal successors, (8725), 3438 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 8725 transitions. [2022-02-11 00:51:57,164 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 8725 transitions. Word has length 30 [2022-02-11 00:51:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:51:57,164 INFO L470 AbstractCegarLoop]: Abstraction has 3439 states and 8725 transitions. [2022-02-11 00:51:57,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:51:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 8725 transitions. [2022-02-11 00:51:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:51:57,172 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:51:57,172 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:51:57,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-11 00:51:57,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-02-11 00:51:57,387 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:51:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:51:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash -788255414, now seen corresponding path program 89 times [2022-02-11 00:51:57,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:51:57,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43292358] [2022-02-11 00:51:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:51:57,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:51:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:51:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:57,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:51:57,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43292358] [2022-02-11 00:51:57,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43292358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:51:57,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996634080] [2022-02-11 00:51:57,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:51:57,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:51:57,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:51:57,675 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) [2022-02-11 00:51:57,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-11 00:51:57,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:51:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:51:57,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:51:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:51:58,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-02-11 00:51:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:58,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:51:58,340 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:51:58,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:51:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:51:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:51:58,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:51:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:51:58,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996634080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:51:58,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:51:58,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-02-11 00:51:58,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478310045] [2022-02-11 00:51:58,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:51:58,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 00:51:58,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:51:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 00:51:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:51:58,440 INFO L87 Difference]: Start difference. First operand 3439 states and 8725 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:00,561 INFO L93 Difference]: Finished difference Result 5643 states and 14221 transitions. [2022-02-11 00:52:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:52:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:00,570 INFO L225 Difference]: With dead ends: 5643 [2022-02-11 00:52:00,570 INFO L226 Difference]: Without dead ends: 5599 [2022-02-11 00:52:00,570 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=560, Invalid=4696, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 00:52:00,571 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 510 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 3288 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:00,571 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 315 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3288 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:52:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2022-02-11 00:52:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 3426. [2022-02-11 00:52:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 2.538102189781022) internal successors, (8693), 3425 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 8693 transitions. [2022-02-11 00:52:00,621 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 8693 transitions. Word has length 30 [2022-02-11 00:52:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:00,621 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 8693 transitions. [2022-02-11 00:52:00,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 8693 transitions. [2022-02-11 00:52:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:00,626 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:00,626 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:00,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-02-11 00:52:00,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-02-11 00:52:00,828 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 285990270, now seen corresponding path program 90 times [2022-02-11 00:52:00,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:00,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233893451] [2022-02-11 00:52:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:01,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:01,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233893451] [2022-02-11 00:52:01,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233893451] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:01,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515525517] [2022-02-11 00:52:01,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:01,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:01,060 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) [2022-02-11 00:52:01,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-11 00:52:01,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:52:01,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:01,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:52:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:01,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:01,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2022-02-11 00:52:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:01,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:01,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:01,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:01,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:01,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-11 00:52:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:02,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515525517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:02,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:02,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-02-11 00:52:02,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891255525] [2022-02-11 00:52:02,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:02,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:52:02,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:52:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:52:02,114 INFO L87 Difference]: Start difference. First operand 3426 states and 8693 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:04,669 INFO L93 Difference]: Finished difference Result 5876 states and 14966 transitions. [2022-02-11 00:52:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-11 00:52:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:04,678 INFO L225 Difference]: With dead ends: 5876 [2022-02-11 00:52:04,678 INFO L226 Difference]: Without dead ends: 5865 [2022-02-11 00:52:04,679 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1191, Invalid=7181, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 00:52:04,679 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 430 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1422 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:04,679 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 166 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1860 Invalid, 0 Unknown, 1422 Unchecked, 0.7s Time] [2022-02-11 00:52:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2022-02-11 00:52:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 3495. [2022-02-11 00:52:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 2.5397824842587293) internal successors, (8874), 3494 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 8874 transitions. [2022-02-11 00:52:04,734 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 8874 transitions. Word has length 30 [2022-02-11 00:52:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:04,734 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 8874 transitions. [2022-02-11 00:52:04,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 8874 transitions. [2022-02-11 00:52:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:04,739 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:04,739 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:04,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-02-11 00:52:04,955 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,SelfDestructingSolverStorable256 [2022-02-11 00:52:04,955 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2042391320, now seen corresponding path program 91 times [2022-02-11 00:52:04,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:04,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110312765] [2022-02-11 00:52:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:05,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:05,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110312765] [2022-02-11 00:52:05,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110312765] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:05,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921414588] [2022-02-11 00:52:05,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:05,266 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) [2022-02-11 00:52:05,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-11 00:52:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:05,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:05,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-02-11 00:52:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:05,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:05,941 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:05,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24 treesize of output 49 [2022-02-11 00:52:06,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:06,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:06,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:06,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921414588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:06,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:06,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-02-11 00:52:06,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031298241] [2022-02-11 00:52:06,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:06,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 00:52:06,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:06,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 00:52:06,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-02-11 00:52:06,063 INFO L87 Difference]: Start difference. First operand 3495 states and 8874 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:08,003 INFO L93 Difference]: Finished difference Result 6046 states and 15408 transitions. [2022-02-11 00:52:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:52:08,003 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:08,012 INFO L225 Difference]: With dead ends: 6046 [2022-02-11 00:52:08,012 INFO L226 Difference]: Without dead ends: 6013 [2022-02-11 00:52:08,013 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 00:52:08,013 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 376 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:08,013 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 219 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:52:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6013 states. [2022-02-11 00:52:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6013 to 3501. [2022-02-11 00:52:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3500 states have (on average 2.539142857142857) internal successors, (8887), 3500 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 8887 transitions. [2022-02-11 00:52:08,066 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 8887 transitions. Word has length 30 [2022-02-11 00:52:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:08,066 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 8887 transitions. [2022-02-11 00:52:08,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 8887 transitions. [2022-02-11 00:52:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:08,070 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:08,070 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:08,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-02-11 00:52:08,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:08,286 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1442156164, now seen corresponding path program 92 times [2022-02-11 00:52:08,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:08,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135167536] [2022-02-11 00:52:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:08,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:08,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:08,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135167536] [2022-02-11 00:52:08,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135167536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:08,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404436172] [2022-02-11 00:52:08,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:08,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:08,577 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) [2022-02-11 00:52:08,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-11 00:52:08,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:08,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:08,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:08,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-02-11 00:52:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:08,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:09,081 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:09,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:09,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:09,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:09,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:09,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404436172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:09,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:09,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:52:09,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783867935] [2022-02-11 00:52:09,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:09,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:09,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:09,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:09,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:09,170 INFO L87 Difference]: Start difference. First operand 3501 states and 8887 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:11,602 INFO L93 Difference]: Finished difference Result 6562 states and 16813 transitions. [2022-02-11 00:52:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:52:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:11,613 INFO L225 Difference]: With dead ends: 6562 [2022-02-11 00:52:11,613 INFO L226 Difference]: Without dead ends: 6545 [2022-02-11 00:52:11,613 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=743, Invalid=4957, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 00:52:11,613 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 318 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:11,613 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 195 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:52:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2022-02-11 00:52:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 3483. [2022-02-11 00:52:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.539345203905801) internal successors, (8842), 3482 states have internal predecessors, (8842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 8842 transitions. [2022-02-11 00:52:11,672 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 8842 transitions. Word has length 30 [2022-02-11 00:52:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:11,672 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 8842 transitions. [2022-02-11 00:52:11,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 8842 transitions. [2022-02-11 00:52:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:11,677 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:11,677 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:11,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:11,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:11,892 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2138600060, now seen corresponding path program 93 times [2022-02-11 00:52:11,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:11,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085643407] [2022-02-11 00:52:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:11,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:12,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:12,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085643407] [2022-02-11 00:52:12,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085643407] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:12,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586149490] [2022-02-11 00:52:12,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:12,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:12,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:12,194 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) [2022-02-11 00:52:12,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-11 00:52:12,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:52:12,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:12,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 00:52:12,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:12,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:12,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-02-11 00:52:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:12,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:13,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:13,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2022-02-11 00:52:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:13,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586149490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:13,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:13,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-02-11 00:52:13,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268363157] [2022-02-11 00:52:13,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:13,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-11 00:52:13,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:13,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-11 00:52:13,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 00:52:13,423 INFO L87 Difference]: Start difference. First operand 3483 states and 8842 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:16,109 INFO L93 Difference]: Finished difference Result 6494 states and 16474 transitions. [2022-02-11 00:52:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 00:52:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:16,119 INFO L225 Difference]: With dead ends: 6494 [2022-02-11 00:52:16,119 INFO L226 Difference]: Without dead ends: 6485 [2022-02-11 00:52:16,120 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=740, Invalid=5422, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 00:52:16,120 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 355 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 3819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1158 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:16,120 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 289 Invalid, 3819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2464 Invalid, 0 Unknown, 1158 Unchecked, 1.0s Time] [2022-02-11 00:52:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6485 states. [2022-02-11 00:52:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6485 to 3492. [2022-02-11 00:52:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.539386995130335) internal successors, (8865), 3491 states have internal predecessors, (8865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8865 transitions. [2022-02-11 00:52:16,183 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8865 transitions. Word has length 30 [2022-02-11 00:52:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:16,183 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 8865 transitions. [2022-02-11 00:52:16,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8865 transitions. [2022-02-11 00:52:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:16,188 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:16,188 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:16,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:16,403 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,SelfDestructingSolverStorable259 [2022-02-11 00:52:16,403 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash -739905714, now seen corresponding path program 88 times [2022-02-11 00:52:16,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:16,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618164630] [2022-02-11 00:52:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:16,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:16,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618164630] [2022-02-11 00:52:16,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618164630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:16,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726646024] [2022-02-11 00:52:16,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:52:16,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:16,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:16,692 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) [2022-02-11 00:52:16,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-11 00:52:16,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:52:16,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:16,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:16,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:17,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-02-11 00:52:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:17,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:17,286 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:17,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:17,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:17,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:17,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:52:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:17,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726646024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:17,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:17,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-02-11 00:52:17,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096651037] [2022-02-11 00:52:17,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:17,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:17,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:17,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:17,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:17,372 INFO L87 Difference]: Start difference. First operand 3492 states and 8865 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:19,002 INFO L93 Difference]: Finished difference Result 6176 states and 15751 transitions. [2022-02-11 00:52:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:52:19,002 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:19,012 INFO L225 Difference]: With dead ends: 6176 [2022-02-11 00:52:19,012 INFO L226 Difference]: Without dead ends: 6165 [2022-02-11 00:52:19,013 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=372, Invalid=2820, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:52:19,013 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:19,013 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 323 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2708 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-11 00:52:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2022-02-11 00:52:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 3528. [2022-02-11 00:52:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.5398355542954354) internal successors, (8958), 3527 states have internal predecessors, (8958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 8958 transitions. [2022-02-11 00:52:19,073 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 8958 transitions. Word has length 30 [2022-02-11 00:52:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:19,073 INFO L470 AbstractCegarLoop]: Abstraction has 3528 states and 8958 transitions. [2022-02-11 00:52:19,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 8958 transitions. [2022-02-11 00:52:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:19,077 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:19,077 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:19,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:19,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:19,293 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1360392850, now seen corresponding path program 89 times [2022-02-11 00:52:19,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:19,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195532616] [2022-02-11 00:52:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:19,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:19,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195532616] [2022-02-11 00:52:19,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195532616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:19,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797465428] [2022-02-11 00:52:19,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:52:19,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:19,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:19,510 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) [2022-02-11 00:52:19,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-11 00:52:19,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:52:19,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:19,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:19,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:19,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:52:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:19,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:19,926 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:19,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:19,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:19,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:19,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:52:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:20,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797465428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:20,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:20,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-02-11 00:52:20,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867943110] [2022-02-11 00:52:20,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:20,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:52:20,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:52:20,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:52:20,001 INFO L87 Difference]: Start difference. First operand 3528 states and 8958 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:21,189 INFO L93 Difference]: Finished difference Result 6052 states and 15465 transitions. [2022-02-11 00:52:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:52:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:21,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:21,198 INFO L225 Difference]: With dead ends: 6052 [2022-02-11 00:52:21,198 INFO L226 Difference]: Without dead ends: 6037 [2022-02-11 00:52:21,199 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=2745, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 00:52:21,199 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 269 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:21,199 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 215 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:52:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2022-02-11 00:52:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 3529. [2022-02-11 00:52:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.5396825396825395) internal successors, (8960), 3528 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8960 transitions. [2022-02-11 00:52:21,264 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8960 transitions. Word has length 30 [2022-02-11 00:52:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 3529 states and 8960 transitions. [2022-02-11 00:52:21,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8960 transitions. [2022-02-11 00:52:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:21,268 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:21,268 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:21,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:21,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:21,484 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash -695189682, now seen corresponding path program 90 times [2022-02-11 00:52:21,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:21,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870228043] [2022-02-11 00:52:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:21,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:21,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870228043] [2022-02-11 00:52:21,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870228043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:21,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43170312] [2022-02-11 00:52:21,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:21,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:21,732 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) [2022-02-11 00:52:21,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-11 00:52:21,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 00:52:21,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:21,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:21,998 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:52:21,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-11 00:52:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:22,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:22,194 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:22,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:22,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:22,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:22,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:22,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43170312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:22,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:22,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-02-11 00:52:22,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518578306] [2022-02-11 00:52:22,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:22,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 00:52:22,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 00:52:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-11 00:52:22,262 INFO L87 Difference]: Start difference. First operand 3529 states and 8960 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:23,419 INFO L93 Difference]: Finished difference Result 6011 states and 15365 transitions. [2022-02-11 00:52:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 00:52:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:23,428 INFO L225 Difference]: With dead ends: 6011 [2022-02-11 00:52:23,428 INFO L226 Difference]: Without dead ends: 5983 [2022-02-11 00:52:23,428 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=400, Invalid=2570, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 00:52:23,429 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 274 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:23,429 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 211 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1896 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 00:52:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2022-02-11 00:52:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 3498. [2022-02-11 00:52:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 2.5390334572490705) internal successors, (8879), 3497 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 8879 transitions. [2022-02-11 00:52:23,481 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 8879 transitions. Word has length 30 [2022-02-11 00:52:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:23,482 INFO L470 AbstractCegarLoop]: Abstraction has 3498 states and 8879 transitions. [2022-02-11 00:52:23,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 8879 transitions. [2022-02-11 00:52:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:23,486 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:23,486 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:23,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:23,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:23,702 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:23,702 INFO L85 PathProgramCache]: Analyzing trace with hash -272860144, now seen corresponding path program 91 times [2022-02-11 00:52:23,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:23,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984422650] [2022-02-11 00:52:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:23,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:23,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:23,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984422650] [2022-02-11 00:52:23,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984422650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:23,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28295858] [2022-02-11 00:52:23,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:23,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:23,969 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) [2022-02-11 00:52:23,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-11 00:52:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:23,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:23,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:24,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:52:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:24,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:24,575 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:24,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:24,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:24,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:52:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:24,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28295858] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:24,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:24,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:52:24,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290506733] [2022-02-11 00:52:24,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:24,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:24,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:24,680 INFO L87 Difference]: Start difference. First operand 3498 states and 8879 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:26,948 INFO L93 Difference]: Finished difference Result 6233 states and 15875 transitions. [2022-02-11 00:52:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 00:52:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:26,959 INFO L225 Difference]: With dead ends: 6233 [2022-02-11 00:52:26,959 INFO L226 Difference]: Without dead ends: 6218 [2022-02-11 00:52:26,960 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=601, Invalid=3955, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 00:52:26,960 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 370 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:26,960 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 258 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:52:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2022-02-11 00:52:27,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 3520. [2022-02-11 00:52:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 2.5385052571753337) internal successors, (8933), 3519 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 8933 transitions. [2022-02-11 00:52:27,015 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 8933 transitions. Word has length 30 [2022-02-11 00:52:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:27,016 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 8933 transitions. [2022-02-11 00:52:27,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:27,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 8933 transitions. [2022-02-11 00:52:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:27,019 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:27,020 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:27,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-02-11 00:52:27,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:27,235 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1483540906, now seen corresponding path program 92 times [2022-02-11 00:52:27,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:27,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122066935] [2022-02-11 00:52:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:27,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:27,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122066935] [2022-02-11 00:52:27,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122066935] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:27,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141641311] [2022-02-11 00:52:27,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:27,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:27,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:27,546 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) [2022-02-11 00:52:27,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-11 00:52:27,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:27,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:27,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:27,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:52:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:27,971 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:27,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:28,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:28,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:28,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:28,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141641311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:28,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:28,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:52:28,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979182916] [2022-02-11 00:52:28,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:28,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:52:28,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:28,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:52:28,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:52:28,050 INFO L87 Difference]: Start difference. First operand 3520 states and 8933 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:29,667 INFO L93 Difference]: Finished difference Result 5759 states and 14673 transitions. [2022-02-11 00:52:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 00:52:29,667 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:29,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:29,675 INFO L225 Difference]: With dead ends: 5759 [2022-02-11 00:52:29,675 INFO L226 Difference]: Without dead ends: 5735 [2022-02-11 00:52:29,676 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=519, Invalid=3513, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:52:29,676 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 368 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:29,676 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 195 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:52:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5735 states. [2022-02-11 00:52:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5735 to 3520. [2022-02-11 00:52:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 2.5382210855356635) internal successors, (8932), 3519 states have internal predecessors, (8932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 8932 transitions. [2022-02-11 00:52:29,730 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 8932 transitions. Word has length 30 [2022-02-11 00:52:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:29,730 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 8932 transitions. [2022-02-11 00:52:29,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 8932 transitions. [2022-02-11 00:52:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:29,735 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:29,735 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:29,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:29,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:29,951 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2018985114, now seen corresponding path program 93 times [2022-02-11 00:52:29,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:29,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950095668] [2022-02-11 00:52:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:29,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:30,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:30,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950095668] [2022-02-11 00:52:30,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950095668] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:30,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54635718] [2022-02-11 00:52:30,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:30,258 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) [2022-02-11 00:52:30,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-11 00:52:30,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 00:52:30,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:30,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-11 00:52:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:30,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:30,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-02-11 00:52:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:30,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:31,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:31,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 28 [2022-02-11 00:52:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:31,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54635718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:31,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:31,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 36 [2022-02-11 00:52:31,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323836448] [2022-02-11 00:52:31,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:31,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 00:52:31,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:31,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 00:52:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 00:52:31,075 INFO L87 Difference]: Start difference. First operand 3520 states and 8932 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:33,295 INFO L93 Difference]: Finished difference Result 6419 states and 16223 transitions. [2022-02-11 00:52:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-11 00:52:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:33,304 INFO L225 Difference]: With dead ends: 6419 [2022-02-11 00:52:33,304 INFO L226 Difference]: Without dead ends: 6399 [2022-02-11 00:52:33,305 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=853, Invalid=6457, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 00:52:33,327 INFO L934 BasicCegarLoop]: 26 mSDtfsCounter, 303 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:33,327 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 249 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2371 Invalid, 0 Unknown, 742 Unchecked, 0.8s Time] [2022-02-11 00:52:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6399 states. [2022-02-11 00:52:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6399 to 3537. [2022-02-11 00:52:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 3536 states have (on average 2.538744343891403) internal successors, (8977), 3536 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 8977 transitions. [2022-02-11 00:52:33,394 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 8977 transitions. Word has length 30 [2022-02-11 00:52:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:33,394 INFO L470 AbstractCegarLoop]: Abstraction has 3537 states and 8977 transitions. [2022-02-11 00:52:33,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 8977 transitions. [2022-02-11 00:52:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:33,398 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:33,398 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:33,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:33,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-11 00:52:33,612 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1056560762, now seen corresponding path program 94 times [2022-02-11 00:52:33,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:33,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212852149] [2022-02-11 00:52:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:33,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:33,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:33,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212852149] [2022-02-11 00:52:33,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212852149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:33,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977722519] [2022-02-11 00:52:33,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:52:33,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:33,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:33,815 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) [2022-02-11 00:52:33,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-11 00:52:33,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:52:33,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:33,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:33,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:34,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:52:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:34,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:34,250 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:34,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:34,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:34,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:34,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:34,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:52:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:34,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977722519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:34,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:34,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:52:34,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129133947] [2022-02-11 00:52:34,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:34,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:34,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:34,328 INFO L87 Difference]: Start difference. First operand 3537 states and 8977 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:36,250 INFO L93 Difference]: Finished difference Result 6025 states and 15335 transitions. [2022-02-11 00:52:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 00:52:36,250 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:36,259 INFO L225 Difference]: With dead ends: 6025 [2022-02-11 00:52:36,260 INFO L226 Difference]: Without dead ends: 6010 [2022-02-11 00:52:36,260 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=634, Invalid=4478, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:52:36,260 INFO L934 BasicCegarLoop]: 28 mSDtfsCounter, 450 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:36,260 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 294 Invalid, 2548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-11 00:52:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2022-02-11 00:52:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 3573. [2022-02-11 00:52:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 3572 states have (on average 2.5389137737961924) internal successors, (9069), 3572 states have internal predecessors, (9069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 9069 transitions. [2022-02-11 00:52:36,315 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 9069 transitions. Word has length 30 [2022-02-11 00:52:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 3573 states and 9069 transitions. [2022-02-11 00:52:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 9069 transitions. [2022-02-11 00:52:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:36,319 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:36,319 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:36,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-02-11 00:52:36,535 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,SelfDestructingSolverStorable266 [2022-02-11 00:52:36,535 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 699840288, now seen corresponding path program 95 times [2022-02-11 00:52:36,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:36,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233942138] [2022-02-11 00:52:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:36,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:36,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233942138] [2022-02-11 00:52:36,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233942138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:36,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943400617] [2022-02-11 00:52:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:52:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:36,856 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) [2022-02-11 00:52:36,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-11 00:52:36,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 00:52:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:36,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:37,218 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-11 00:52:37,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 47 [2022-02-11 00:52:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:37,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:37,498 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:37,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:37,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:37,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:37,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943400617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:37,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:37,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:52:37,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080963210] [2022-02-11 00:52:37,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:37,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:52:37,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:52:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:52:37,602 INFO L87 Difference]: Start difference. First operand 3573 states and 9069 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:40,171 INFO L93 Difference]: Finished difference Result 6054 states and 15430 transitions. [2022-02-11 00:52:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 00:52:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:40,180 INFO L225 Difference]: With dead ends: 6054 [2022-02-11 00:52:40,180 INFO L226 Difference]: Without dead ends: 6028 [2022-02-11 00:52:40,180 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=645, Invalid=4467, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 00:52:40,181 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 436 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:40,181 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 256 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:52:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2022-02-11 00:52:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 3587. [2022-02-11 00:52:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.538482989403235) internal successors, (9103), 3586 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9103 transitions. [2022-02-11 00:52:40,235 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9103 transitions. Word has length 30 [2022-02-11 00:52:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:40,235 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 9103 transitions. [2022-02-11 00:52:40,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9103 transitions. [2022-02-11 00:52:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:40,239 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:40,239 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:40,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-11 00:52:40,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-02-11 00:52:40,454 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1235284496, now seen corresponding path program 96 times [2022-02-11 00:52:40,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:40,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924165494] [2022-02-11 00:52:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:40,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:40,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924165494] [2022-02-11 00:52:40,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924165494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:40,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890008527] [2022-02-11 00:52:40,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 00:52:40,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:40,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:40,808 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) [2022-02-11 00:52:40,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-11 00:52:40,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 00:52:40,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:40,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-11 00:52:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:41,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:41,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-02-11 00:52:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:41,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:41,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:41,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 00:52:41,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2022-02-11 00:52:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:42,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890008527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:42,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:42,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-02-11 00:52:42,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047242571] [2022-02-11 00:52:42,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:42,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-11 00:52:42,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-11 00:52:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-02-11 00:52:42,016 INFO L87 Difference]: Start difference. First operand 3587 states and 9103 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:44,454 INFO L93 Difference]: Finished difference Result 4827 states and 12132 transitions. [2022-02-11 00:52:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 00:52:44,454 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:44,461 INFO L225 Difference]: With dead ends: 4827 [2022-02-11 00:52:44,461 INFO L226 Difference]: Without dead ends: 4802 [2022-02-11 00:52:44,461 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=793, Invalid=5059, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 00:52:44,461 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 414 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:44,461 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 231 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1397 Invalid, 0 Unknown, 1378 Unchecked, 0.6s Time] [2022-02-11 00:52:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2022-02-11 00:52:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 3638. [2022-02-11 00:52:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 2.537805883970305) internal successors, (9230), 3637 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 9230 transitions. [2022-02-11 00:52:44,504 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 9230 transitions. Word has length 30 [2022-02-11 00:52:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:44,504 INFO L470 AbstractCegarLoop]: Abstraction has 3638 states and 9230 transitions. [2022-02-11 00:52:44,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 9230 transitions. [2022-02-11 00:52:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:44,508 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:44,508 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:44,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:44,722 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,SelfDestructingSolverStorable268 [2022-02-11 00:52:44,722 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:44,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:44,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1485763794, now seen corresponding path program 97 times [2022-02-11 00:52:44,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:44,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705020647] [2022-02-11 00:52:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:44,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:45,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:45,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705020647] [2022-02-11 00:52:45,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705020647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:45,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836120787] [2022-02-11 00:52:45,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 00:52:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:45,024 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) [2022-02-11 00:52:45,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-11 00:52:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:45,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:45,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:45,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:52:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:45,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:45,700 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:45,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:45,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:45,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:45,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:45,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836120787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:45,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:45,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:52:45,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663500954] [2022-02-11 00:52:45,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:45,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:45,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:45,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:45,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:45,810 INFO L87 Difference]: Start difference. First operand 3638 states and 9230 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:47,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:47,817 INFO L93 Difference]: Finished difference Result 5389 states and 13615 transitions. [2022-02-11 00:52:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:52:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:47,825 INFO L225 Difference]: With dead ends: 5389 [2022-02-11 00:52:47,825 INFO L226 Difference]: Without dead ends: 5356 [2022-02-11 00:52:47,826 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=470, Invalid=3562, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:52:47,826 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 413 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:47,826 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 268 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 00:52:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2022-02-11 00:52:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 3612. [2022-02-11 00:52:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5383550263085017) internal successors, (9166), 3611 states have internal predecessors, (9166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9166 transitions. [2022-02-11 00:52:47,881 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9166 transitions. Word has length 30 [2022-02-11 00:52:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:47,882 INFO L470 AbstractCegarLoop]: Abstraction has 3612 states and 9166 transitions. [2022-02-11 00:52:47,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9166 transitions. [2022-02-11 00:52:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:47,886 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:47,886 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:47,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:48,091 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,SelfDestructingSolverStorable269 [2022-02-11 00:52:48,091 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1640030634, now seen corresponding path program 98 times [2022-02-11 00:52:48,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:48,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636704521] [2022-02-11 00:52:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:48,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:48,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:48,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636704521] [2022-02-11 00:52:48,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636704521] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:48,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956403215] [2022-02-11 00:52:48,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 00:52:48,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:48,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:48,401 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) [2022-02-11 00:52:48,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-11 00:52:48,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 00:52:48,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:48,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:48,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:48,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:52:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:48,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:49,049 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:49,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:49,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:49,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:49,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:49,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:49,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956403215] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:49,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:49,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:52:49,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332129033] [2022-02-11 00:52:49,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:49,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:49,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:49,160 INFO L87 Difference]: Start difference. First operand 3612 states and 9166 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:51,459 INFO L93 Difference]: Finished difference Result 5427 states and 13691 transitions. [2022-02-11 00:52:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 00:52:51,459 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:51,467 INFO L225 Difference]: With dead ends: 5427 [2022-02-11 00:52:51,467 INFO L226 Difference]: Without dead ends: 5366 [2022-02-11 00:52:51,467 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:52:51,467 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 447 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:51,467 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 286 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-11 00:52:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2022-02-11 00:52:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 3603. [2022-02-11 00:52:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.53858967240422) internal successors, (9144), 3602 states have internal predecessors, (9144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9144 transitions. [2022-02-11 00:52:51,518 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9144 transitions. Word has length 30 [2022-02-11 00:52:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:51,518 INFO L470 AbstractCegarLoop]: Abstraction has 3603 states and 9144 transitions. [2022-02-11 00:52:51,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9144 transitions. [2022-02-11 00:52:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:51,523 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:51,523 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:51,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-02-11 00:52:51,741 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,SelfDestructingSolverStorable270 [2022-02-11 00:52:51,741 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1771895664, now seen corresponding path program 99 times [2022-02-11 00:52:51,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:51,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025345740] [2022-02-11 00:52:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:52,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:52,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025345740] [2022-02-11 00:52:52,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025345740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:52,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837201838] [2022-02-11 00:52:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 00:52:52,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:52,012 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) [2022-02-11 00:52:52,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-11 00:52:52,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 00:52:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:52,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:52,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:52,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-02-11 00:52:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:52,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:52,536 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:52,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:52,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:52,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-02-11 00:52:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:52,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837201838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:52,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:52,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:52:52,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302858607] [2022-02-11 00:52:52,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:52,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:52,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:52,638 INFO L87 Difference]: Start difference. First operand 3603 states and 9144 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:54,421 INFO L93 Difference]: Finished difference Result 6293 states and 16040 transitions. [2022-02-11 00:52:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 00:52:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:54,431 INFO L225 Difference]: With dead ends: 6293 [2022-02-11 00:52:54,432 INFO L226 Difference]: Without dead ends: 6278 [2022-02-11 00:52:54,432 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=502, Invalid=3530, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 00:52:54,432 INFO L934 BasicCegarLoop]: 31 mSDtfsCounter, 401 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:54,432 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 366 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:52:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-02-11 00:52:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 3623. [2022-02-11 00:52:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 2.538928768636113) internal successors, (9196), 3622 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 9196 transitions. [2022-02-11 00:52:54,497 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 9196 transitions. Word has length 30 [2022-02-11 00:52:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:54,497 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 9196 transitions. [2022-02-11 00:52:54,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 9196 transitions. [2022-02-11 00:52:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:54,501 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:54,501 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:54,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-02-11 00:52:54,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:54,716 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:54,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:54,716 INFO L85 PathProgramCache]: Analyzing trace with hash -15494614, now seen corresponding path program 100 times [2022-02-11 00:52:54,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:54,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715684876] [2022-02-11 00:52:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:54,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:54,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:54,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715684876] [2022-02-11 00:52:54,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715684876] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:54,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010128278] [2022-02-11 00:52:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 00:52:54,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:54,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:54,952 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) [2022-02-11 00:52:54,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-11 00:52:54,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 00:52:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:54,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:55,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:52:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:55,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:55,553 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:55,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:55,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:55,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:55,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:55,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010128278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:55,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:55,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 28 [2022-02-11 00:52:55,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403499344] [2022-02-11 00:52:55,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:55,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 00:52:55,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 00:52:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-02-11 00:52:55,657 INFO L87 Difference]: Start difference. First operand 3623 states and 9196 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 00:52:57,550 INFO L93 Difference]: Finished difference Result 6289 states and 16030 transitions. [2022-02-11 00:52:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 00:52:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-02-11 00:52:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 00:52:57,560 INFO L225 Difference]: With dead ends: 6289 [2022-02-11 00:52:57,560 INFO L226 Difference]: Without dead ends: 6265 [2022-02-11 00:52:57,560 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=494, Invalid=3412, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 00:52:57,561 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 396 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:52:57,561 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 316 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2074 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:52:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6265 states. [2022-02-11 00:52:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6265 to 3623. [2022-02-11 00:52:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 2.538928768636113) internal successors, (9196), 3622 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 9196 transitions. [2022-02-11 00:52:57,638 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 9196 transitions. Word has length 30 [2022-02-11 00:52:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 00:52:57,639 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 9196 transitions. [2022-02-11 00:52:57,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 00:52:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 9196 transitions. [2022-02-11 00:52:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-11 00:52:57,643 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 00:52:57,643 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 00:52:57,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-02-11 00:52:57,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:57,856 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 00:52:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 00:52:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash 519949594, now seen corresponding path program 101 times [2022-02-11 00:52:57,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 00:52:57,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592640928] [2022-02-11 00:52:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 00:52:57,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 00:52:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 00:52:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:58,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 00:52:58,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592640928] [2022-02-11 00:52:58,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592640928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 00:52:58,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786325414] [2022-02-11 00:52:58,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 00:52:58,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:52:58,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 00:52:58,092 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) [2022-02-11 00:52:58,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-11 00:52:58,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 00:52:58,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 00:52:58,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 00:52:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 00:52:58,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-02-11 00:52:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:58,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 00:52:58,629 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 00:52:58,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 48 [2022-02-11 00:52:58,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:58,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 00:52:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 00:52:58,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-02-11 00:52:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 00:52:58,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786325414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 00:52:58,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 00:52:58,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 29 [2022-02-11 00:52:58,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267769810] [2022-02-11 00:52:58,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 00:52:58,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 00:52:58,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 00:52:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 00:52:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-11 00:52:58,726 INFO L87 Difference]: Start difference. First operand 3623 states and 9196 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-11 00:53:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-11 00:53:00,285 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 00:53:00,286 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 313 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-11 00:53:00,286 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 252 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-11 00:53:00,286 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-11 00:53:00,296 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 00:53:00,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-02-11 00:53:00,309 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-11 00:53:00,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 00:53:00,498 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (3623states) and FLOYD_HOARE automaton (currently 42 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (5020 states constructed, input type IntersectNwa). [2022-02-11 00:53:00,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-11 00:53:00,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-11 00:53:00,517 INFO L733 BasicCegarLoop]: Path program histogram: [101, 93, 76, 2, 1, 1] [2022-02-11 00:53:00,540 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 00:53:00,540 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 00:53:00,552 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 12:53:00 BasicIcfg [2022-02-11 00:53:00,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 00:53:00,552 INFO L158 Benchmark]: Toolchain (without parser) took 890474.45ms. Allocated memory was 235.9MB in the beginning and 588.3MB in the end (delta: 352.3MB). Free memory was 196.8MB in the beginning and 487.8MB in the end (delta: -291.0MB). Peak memory consumption was 61.7MB. Max. memory is 8.0GB. [2022-02-11 00:53:00,552 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.16ms. Allocated memory is still 235.9MB. Free memory is still 197.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:53:00,552 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.13ms. Allocated memory is still 235.9MB. Free memory was 196.7MB in the beginning and 195.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 00:53:00,552 INFO L158 Benchmark]: Boogie Preprocessor took 11.82ms. Allocated memory is still 235.9MB. Free memory was 195.2MB in the beginning and 194.2MB in the end (delta: 973.7kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-11 00:53:00,552 INFO L158 Benchmark]: RCFGBuilder took 212.53ms. Allocated memory is still 235.9MB. Free memory was 194.1MB in the beginning and 185.2MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 00:53:00,552 INFO L158 Benchmark]: TraceAbstraction took 890214.34ms. Allocated memory was 235.9MB in the beginning and 588.3MB in the end (delta: 352.3MB). Free memory was 184.6MB in the beginning and 487.8MB in the end (delta: -303.2MB). Peak memory consumption was 50.2MB. Max. memory is 8.0GB. [2022-02-11 00:53:00,552 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 0.16ms. Allocated memory is still 235.9MB. Free memory is still 197.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.13ms. Allocated memory is still 235.9MB. Free memory was 196.7MB in the beginning and 195.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 11.82ms. Allocated memory is still 235.9MB. Free memory was 195.2MB in the beginning and 194.2MB in the end (delta: 973.7kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 212.53ms. Allocated memory is still 235.9MB. Free memory was 194.1MB in the beginning and 185.2MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 890214.34ms. Allocated memory was 235.9MB in the beginning and 588.3MB in the end (delta: 352.3MB). Free memory was 184.6MB in the beginning and 487.8MB in the end (delta: -303.2MB). Peak memory consumption was 50.2MB. 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: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3623states) and FLOYD_HOARE automaton (currently 42 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (5020 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3623states) and FLOYD_HOARE automaton (currently 42 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (5020 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3623states) and FLOYD_HOARE automaton (currently 42 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (5020 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 890.0s, OverallIterations: 274, TraceHistogramMax: 2, PathProgramHistogramMax: 101, EmptinessCheckTime: 0.7s, AutomataDifference: 561.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 105989 SdHoareTripleChecker+Valid, 225.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 105989 mSDsluCounter, 63205 SdHoareTripleChecker+Invalid, 192.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 62681 IncrementalHoareTripleChecker+Unchecked, 93567 mSDsCounter, 50513 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 561559 IncrementalHoareTripleChecker+Invalid, 674753 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50513 mSolverCounterUnsat, 5700 mSDtfsCounter, 561559 mSolverCounterSat, 1.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29916 GetRequests, 11037 SyntacticMatches, 1264 SemanticMatches, 17615 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 414676 ImplicationChecksByTransitivity, 423.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3638occurred in iteration=269, InterpolantAutomatonStates: 14133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.5s AutomataMinimizationTime, 273 MinimizatonAttempts, 510230 StatesRemovedByMinimization, 273 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 251.4s InterpolantComputationTime, 15970 NumberOfCodeBlocks, 15947 NumberOfCodeBlocksAsserted, 971 NumberOfCheckSat, 23122 ConstructedInterpolants, 453 QuantifiedInterpolants, 505922 SizeOfPredicates, 2307 NumberOfNonLiveVariables, 16496 ConjunctsInSsa, 8096 ConjunctsInUnsatCore, 818 InterpolantComputations, 2 PerfectInterpolantSequences, 139/8815 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