/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 14:35:27,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 14:35:27,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 14:35:27,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 14:35:27,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-15 14:35:27,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 14:35:27,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 14:35:27,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 14:35:27,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 14:35:27,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 14:35:27,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 14:35:27,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 14:35:27,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 14:35:27,639 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 14:35:27,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 14:35:27,639 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 14:35:27,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 14:35:27,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 14:35:27,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 14:35:27,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 14:35:27,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 14:35:27,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 14:35:27,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 14:35:27,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:35:27,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 14:35:27,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 14:35:27,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 14:35:27,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 14:35:27,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 14:35:27,641 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 14:35:27,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 14:35:27,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 14:35:27,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 14:35:27,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 14:35:27,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 14:35:27,820 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 14:35:27,821 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 14:35:27,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2022-02-15 14:35:27,822 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2022-02-15 14:35:27,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 14:35:27,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 14:35:27,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 14:35:27,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 14:35:27,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 14:35:27,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,860 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 14:35:27,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 14:35:27,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 14:35:27,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 14:35:27,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 14:35:27,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 14:35:27,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 14:35:27,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 14:35:27,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 14:35:27,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/1) ... [2022-02-15 14:35:27,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:35:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:27,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 14:35:27,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 14:35:27,938 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 14:35:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 14:35:27,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 14:35:27,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 14:35:27,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 14:35:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 14:35:27,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 14:35:27,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 14:35:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 14:35:27,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 14:35:27,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 14:35:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 14:35:27,940 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 14:35:27,972 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 14:35:27,973 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 14:35:28,089 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 14:35:28,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 14:35:28,101 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 14:35:28,102 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:35:28 BoogieIcfgContainer [2022-02-15 14:35:28,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 14:35:28,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 14:35:28,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 14:35:28,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 14:35:28,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:35:27" (1/2) ... [2022-02-15 14:35:28,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468e8fa0 and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:35:28, skipping insertion in model container [2022-02-15 14:35:28,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:35:28" (2/2) ... [2022-02-15 14:35:28,110 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2022-02-15 14:35:28,113 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 14:35:28,113 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 14:35:28,113 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 14:35:28,113 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 14:35:28,159 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-15 14:35:28,196 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 14:35:28,204 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-15 14:35:28,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-15 14:35:28,213 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-02-15 14:35:28,261 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 14:35:28,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:28,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:28,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash -427804195, now seen corresponding path program 1 times [2022-02-15 14:35:28,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:28,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26947352] [2022-02-15 14:35:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:28,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:28,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:28,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26947352] [2022-02-15 14:35:28,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26947352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:35:28,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:35:28,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 14:35:28,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895415889] [2022-02-15 14:35:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:35:28,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 14:35:28,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 14:35:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:35:28,437 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:28,529 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2022-02-15 14:35:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 14:35:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-15 14:35:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:28,539 INFO L225 Difference]: With dead ends: 154 [2022-02-15 14:35:28,539 INFO L226 Difference]: Without dead ends: 154 [2022-02-15 14:35:28,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:35:28,543 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:28,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:35:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-15 14:35:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2022-02-15 14:35:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-02-15 14:35:28,600 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2022-02-15 14:35:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:28,600 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-02-15 14:35:28,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-02-15 14:35:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 14:35:28,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:28,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:28,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 14:35:28,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash -436737251, now seen corresponding path program 1 times [2022-02-15 14:35:28,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:28,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190099425] [2022-02-15 14:35:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:28,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:28,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:28,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190099425] [2022-02-15 14:35:28,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190099425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:35:28,651 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:35:28,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 14:35:28,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893093535] [2022-02-15 14:35:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:35:28,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 14:35:28,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 14:35:28,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 14:35:28,653 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:28,711 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2022-02-15 14:35:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 14:35:28,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-15 14:35:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:28,713 INFO L225 Difference]: With dead ends: 158 [2022-02-15 14:35:28,713 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 14:35:28,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 14:35:28,714 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:28,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:35:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 14:35:28,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-02-15 14:35:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-02-15 14:35:28,733 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-02-15 14:35:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:28,733 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-02-15 14:35:28,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-02-15 14:35:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:35:28,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:28,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:28,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 14:35:28,738 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash 277137723, now seen corresponding path program 1 times [2022-02-15 14:35:28,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:28,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614102400] [2022-02-15 14:35:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:28,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:29,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:29,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614102400] [2022-02-15 14:35:29,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614102400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:29,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736243147] [2022-02-15 14:35:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:29,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:29,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:29,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 14:35:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-15 14:35:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:29,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:35:29,735 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 54 treesize of output 40 [2022-02-15 14:35:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:29,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:30,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:30,218 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 107 treesize of output 95 [2022-02-15 14:35:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:30,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736243147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:30,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:30,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 19 [2022-02-15 14:35:30,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049645498] [2022-02-15 14:35:30,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:30,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 14:35:30,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:30,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 14:35:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:35:30,860 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:31,243 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-02-15 14:35:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 14:35:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:35:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:31,246 INFO L225 Difference]: With dead ends: 366 [2022-02-15 14:35:31,246 INFO L226 Difference]: Without dead ends: 351 [2022-02-15 14:35:31,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:35:31,248 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 198 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:31,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 84 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 309 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-02-15 14:35:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-15 14:35:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-02-15 14:35:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-02-15 14:35:31,278 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-02-15 14:35:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:31,278 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-02-15 14:35:31,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-02-15 14:35:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:35:31,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:31,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:31,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:31,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:31,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 109328631, now seen corresponding path program 2 times [2022-02-15 14:35:31,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:31,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149923535] [2022-02-15 14:35:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:31,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:31,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:31,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149923535] [2022-02-15 14:35:31,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149923535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:31,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833641529] [2022-02-15 14:35:31,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:35:31,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:31,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:31,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:31,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 14:35:31,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:35:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-15 14:35:31,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:32,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:32,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2022-02-15 14:35:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:32,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:32,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:32,452 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 77 treesize of output 69 [2022-02-15 14:35:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:32,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833641529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:32,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:32,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-02-15 14:35:32,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813105767] [2022-02-15 14:35:32,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:32,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 14:35:32,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 14:35:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-15 14:35:32,789 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:33,604 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-02-15 14:35:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:35:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:35:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:33,607 INFO L225 Difference]: With dead ends: 478 [2022-02-15 14:35:33,607 INFO L226 Difference]: Without dead ends: 463 [2022-02-15 14:35:33,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:35:33,608 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 230 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:33,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 126 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 590 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-02-15 14:35:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-15 14:35:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-02-15 14:35:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-02-15 14:35:33,624 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-02-15 14:35:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:33,624 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-02-15 14:35:33,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-02-15 14:35:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:35:33,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:33,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:33,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:33,843 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 [2022-02-15 14:35:33,844 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash 408102079, now seen corresponding path program 3 times [2022-02-15 14:35:33,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:33,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770715900] [2022-02-15 14:35:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:33,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:33,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:33,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770715900] [2022-02-15 14:35:33,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770715900] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:33,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706621037] [2022-02-15 14:35:33,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:35:33,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:33,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:33,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 14:35:34,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:35:34,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-15 14:35:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:34,204 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 54 treesize of output 40 [2022-02-15 14:35:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:34,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:34,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:34,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-02-15 14:35:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:34,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706621037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:34,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:34,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-02-15 14:35:34,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960426894] [2022-02-15 14:35:34,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:34,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 14:35:34,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:34,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 14:35:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:35:34,888 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:35,476 INFO L93 Difference]: Finished difference Result 433 states and 1240 transitions. [2022-02-15 14:35:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 14:35:35,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:35:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:35,479 INFO L225 Difference]: With dead ends: 433 [2022-02-15 14:35:35,479 INFO L226 Difference]: Without dead ends: 418 [2022-02-15 14:35:35,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:35:35,483 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:35,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 147 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 377 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-02-15 14:35:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-15 14:35:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 241. [2022-02-15 14:35:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-02-15 14:35:35,503 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-02-15 14:35:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:35,503 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-02-15 14:35:35,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-02-15 14:35:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:35:35,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:35,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:35,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:35,704 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 [2022-02-15 14:35:35,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1978927679, now seen corresponding path program 4 times [2022-02-15 14:35:35,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:35,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861939820] [2022-02-15 14:35:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:35,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:35,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:35,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861939820] [2022-02-15 14:35:35,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861939820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:35,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437486966] [2022-02-15 14:35:35,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:35:35,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:35,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:35,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:35,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 14:35:35,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:35:35,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:35,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-15 14:35:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:36,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:36,121 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 52 treesize of output 46 [2022-02-15 14:35:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:36,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:36,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:36,631 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 117 treesize of output 99 [2022-02-15 14:35:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:36,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437486966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:36,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:36,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-15 14:35:36,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030893439] [2022-02-15 14:35:36,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:36,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:35:36,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:35:36,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:35:36,910 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:37,258 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-02-15 14:35:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:35:37,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:35:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:37,260 INFO L225 Difference]: With dead ends: 374 [2022-02-15 14:35:37,260 INFO L226 Difference]: Without dead ends: 359 [2022-02-15 14:35:37,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:35:37,261 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:37,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 152 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-02-15 14:35:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-15 14:35:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-02-15 14:35:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-02-15 14:35:37,267 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-02-15 14:35:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:37,267 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-02-15 14:35:37,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-02-15 14:35:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:35:37,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:37,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:37,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:37,469 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 [2022-02-15 14:35:37,469 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2069580027, now seen corresponding path program 5 times [2022-02-15 14:35:37,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:37,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272341214] [2022-02-15 14:35:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:37,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:37,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:37,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272341214] [2022-02-15 14:35:37,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272341214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:37,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638604395] [2022-02-15 14:35:37,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:35:37,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:37,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:37,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:37,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 14:35:37,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:35:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-15 14:35:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:37,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:37,877 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 62 [2022-02-15 14:35:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:38,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:38,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:38,398 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 117 treesize of output 99 [2022-02-15 14:35:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:38,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638604395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:38,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:38,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-02-15 14:35:38,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309463540] [2022-02-15 14:35:38,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:38,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:35:38,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:35:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:35:38,806 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:40,243 INFO L93 Difference]: Finished difference Result 941 states and 2727 transitions. [2022-02-15 14:35:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 14:35:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:35:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:40,248 INFO L225 Difference]: With dead ends: 941 [2022-02-15 14:35:40,248 INFO L226 Difference]: Without dead ends: 926 [2022-02-15 14:35:40,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:35:40,249 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:40,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 265 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 452 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-02-15 14:35:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-02-15 14:35:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 247. [2022-02-15 14:35:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-02-15 14:35:40,261 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-02-15 14:35:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:40,262 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-02-15 14:35:40,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-02-15 14:35:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:35:40,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:40,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:40,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:40,470 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 [2022-02-15 14:35:40,470 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash -809004765, now seen corresponding path program 6 times [2022-02-15 14:35:40,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:40,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691958134] [2022-02-15 14:35:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:40,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:40,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:40,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691958134] [2022-02-15 14:35:40,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691958134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:40,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882685126] [2022-02-15 14:35:40,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:35:40,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:40,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:40,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:40,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 14:35:40,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 14:35:40,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:40,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-15 14:35:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:40,967 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 14:35:40,968 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 57 [2022-02-15 14:35:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:41,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:41,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:41,382 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 117 treesize of output 99 [2022-02-15 14:35:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:41,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882685126] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:41,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:41,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-02-15 14:35:41,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904805306] [2022-02-15 14:35:41,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:41,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 14:35:41,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 14:35:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-02-15 14:35:41,932 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:42,916 INFO L93 Difference]: Finished difference Result 697 states and 2001 transitions. [2022-02-15 14:35:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 14:35:42,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:35:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:42,919 INFO L225 Difference]: With dead ends: 697 [2022-02-15 14:35:42,919 INFO L226 Difference]: Without dead ends: 682 [2022-02-15 14:35:42,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2022-02-15 14:35:42,920 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:42,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 211 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 348 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-02-15 14:35:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-15 14:35:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 247. [2022-02-15 14:35:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-02-15 14:35:42,928 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-02-15 14:35:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:42,929 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-02-15 14:35:42,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-02-15 14:35:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 14:35:42,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:42,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:42,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:43,143 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 [2022-02-15 14:35:43,143 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1770731385, now seen corresponding path program 7 times [2022-02-15 14:35:43,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:43,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586060776] [2022-02-15 14:35:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:43,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:43,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:43,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586060776] [2022-02-15 14:35:43,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586060776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:43,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188875883] [2022-02-15 14:35:43,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:35:43,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:43,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:43,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 14:35:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:43,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-15 14:35:43,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:43,646 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 14:35:43,647 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 55 [2022-02-15 14:35:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:44,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:35:44,032 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 117 treesize of output 99 [2022-02-15 14:35:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:44,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188875883] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:44,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:44,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-02-15 14:35:44,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909236795] [2022-02-15 14:35:44,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:44,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 14:35:44,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:44,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 14:35:44,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-15 14:35:44,492 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:45,552 INFO L93 Difference]: Finished difference Result 713 states and 2059 transitions. [2022-02-15 14:35:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 14:35:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-15 14:35:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:45,555 INFO L225 Difference]: With dead ends: 713 [2022-02-15 14:35:45,556 INFO L226 Difference]: Without dead ends: 698 [2022-02-15 14:35:45,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:35:45,556 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:45,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 236 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2022-02-15 14:35:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-15 14:35:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 247. [2022-02-15 14:35:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-02-15 14:35:45,565 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-02-15 14:35:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:45,565 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-02-15 14:35:45,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-02-15 14:35:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:45,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:45,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:45,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:45,776 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 [2022-02-15 14:35:45,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash -973582823, now seen corresponding path program 8 times [2022-02-15 14:35:45,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:45,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758889156] [2022-02-15 14:35:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:45,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:45,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:45,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758889156] [2022-02-15 14:35:45,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758889156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:45,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490492207] [2022-02-15 14:35:45,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:35:45,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:45,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:45,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:45,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 14:35:45,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:35:45,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:45,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:45,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:46,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490492207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:46,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:46,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-15 14:35:46,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574732053] [2022-02-15 14:35:46,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:35:46,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:35:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:35:46,020 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:46,783 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-02-15 14:35:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 14:35:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:46,788 INFO L225 Difference]: With dead ends: 1099 [2022-02-15 14:35:46,788 INFO L226 Difference]: Without dead ends: 1099 [2022-02-15 14:35:46,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 14:35:46,790 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 267 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:46,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 206 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:35:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-15 14:35:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-02-15 14:35:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-02-15 14:35:46,801 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-02-15 14:35:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:46,801 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-02-15 14:35:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-02-15 14:35:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:46,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:46,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:46,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:47,015 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 [2022-02-15 14:35:47,015 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:47,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:47,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1949901667, now seen corresponding path program 9 times [2022-02-15 14:35:47,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:47,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18992682] [2022-02-15 14:35:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:47,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:47,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:47,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18992682] [2022-02-15 14:35:47,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18992682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:47,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488828937] [2022-02-15 14:35:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:35:47,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:47,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:47,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 14:35:47,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:35:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:47,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488828937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:47,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:47,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-15 14:35:47,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943289580] [2022-02-15 14:35:47,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:47,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 14:35:47,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:47,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 14:35:47,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:35:47,253 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:48,970 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-02-15 14:35:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-15 14:35:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:48,982 INFO L225 Difference]: With dead ends: 1794 [2022-02-15 14:35:48,983 INFO L226 Difference]: Without dead ends: 1794 [2022-02-15 14:35:48,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-02-15 14:35:48,986 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 411 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:48,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 333 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 14:35:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-02-15 14:35:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-02-15 14:35:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-02-15 14:35:49,001 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-02-15 14:35:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:49,001 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-02-15 14:35:49,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-02-15 14:35:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:49,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:49,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:49,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:49,218 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 [2022-02-15 14:35:49,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:49,219 INFO L85 PathProgramCache]: Analyzing trace with hash -420997023, now seen corresponding path program 10 times [2022-02-15 14:35:49,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:49,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129757574] [2022-02-15 14:35:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:49,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:49,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:49,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129757574] [2022-02-15 14:35:49,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129757574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:49,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665148731] [2022-02-15 14:35:49,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:35:49,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:49,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:49,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:49,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 14:35:49,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:35:49,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:49,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:49,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:49,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665148731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:49,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:49,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-15 14:35:49,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244258240] [2022-02-15 14:35:49,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:49,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 14:35:49,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 14:35:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:35:49,474 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:50,392 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-02-15 14:35:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 14:35:50,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:50,398 INFO L225 Difference]: With dead ends: 1470 [2022-02-15 14:35:50,398 INFO L226 Difference]: Without dead ends: 1470 [2022-02-15 14:35:50,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:35:50,400 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 388 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:50,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 257 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:35:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-02-15 14:35:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-02-15 14:35:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-02-15 14:35:50,417 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-02-15 14:35:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:50,417 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-02-15 14:35:50,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-02-15 14:35:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:50,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:50,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:50,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:50,634 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 [2022-02-15 14:35:50,635 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash -446810915, now seen corresponding path program 1 times [2022-02-15 14:35:50,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:50,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479275507] [2022-02-15 14:35:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:50,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:50,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:50,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479275507] [2022-02-15 14:35:50,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479275507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:50,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148851346] [2022-02-15 14:35:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:50,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:50,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:50,666 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:50,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 14:35:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:50,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:35:50,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:50,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:50,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148851346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:50,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:50,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-15 14:35:50,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678851467] [2022-02-15 14:35:50,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:50,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:35:50,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:35:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:35:50,813 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:50,936 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-02-15 14:35:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 14:35:50,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:50,939 INFO L225 Difference]: With dead ends: 685 [2022-02-15 14:35:50,939 INFO L226 Difference]: Without dead ends: 679 [2022-02-15 14:35:50,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:35:50,940 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:50,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 40 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:35:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-15 14:35:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-02-15 14:35:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-02-15 14:35:50,949 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-02-15 14:35:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:50,949 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-02-15 14:35:50,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-02-15 14:35:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:50,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:50,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:50,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:51,169 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 [2022-02-15 14:35:51,169 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:51,170 INFO L85 PathProgramCache]: Analyzing trace with hash -883779623, now seen corresponding path program 11 times [2022-02-15 14:35:51,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:51,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352796095] [2022-02-15 14:35:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:51,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:51,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:51,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352796095] [2022-02-15 14:35:51,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352796095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:51,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046357790] [2022-02-15 14:35:51,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:35:51,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:51,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:51,212 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:51,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 14:35:51,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:35:51,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:51,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:51,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:51,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046357790] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:51,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:51,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 14:35:51,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413541884] [2022-02-15 14:35:51,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:51,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:35:51,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:35:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:35:51,374 INFO L87 Difference]: Start difference. First operand 429 states and 1387 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) [2022-02-15 14:35:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:51,686 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-02-15 14:35:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 14:35:51,686 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 24 [2022-02-15 14:35:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:51,691 INFO L225 Difference]: With dead ends: 1159 [2022-02-15 14:35:51,691 INFO L226 Difference]: Without dead ends: 1111 [2022-02-15 14:35:51,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-15 14:35:51,692 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 272 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:51,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 118 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:35:51,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-02-15 14:35:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-02-15 14:35:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-02-15 14:35:51,715 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-02-15 14:35:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-02-15 14:35:51,716 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) [2022-02-15 14:35:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-02-15 14:35:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:51,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:51,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:51,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:51,930 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 [2022-02-15 14:35:51,930 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1589736955, now seen corresponding path program 2 times [2022-02-15 14:35:51,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:51,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102487827] [2022-02-15 14:35:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:51,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:51,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:51,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102487827] [2022-02-15 14:35:51,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102487827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:51,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422818026] [2022-02-15 14:35:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:35:51,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:51,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:51,957 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:51,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 14:35:51,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:35:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:35:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:52,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:52,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422818026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:52,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:52,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-15 14:35:52,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315900020] [2022-02-15 14:35:52,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:52,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:35:52,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:35:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:35:52,092 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:52,283 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-02-15 14:35:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 14:35:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:52,288 INFO L225 Difference]: With dead ends: 1267 [2022-02-15 14:35:52,289 INFO L226 Difference]: Without dead ends: 1267 [2022-02-15 14:35:52,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-02-15 14:35:52,289 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 201 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:52,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 61 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:35:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-15 14:35:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-02-15 14:35:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 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) [2022-02-15 14:35:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-02-15 14:35:52,305 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-02-15 14:35:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:52,305 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-02-15 14:35:52,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-02-15 14:35:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:52,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:52,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:52,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:52,523 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 [2022-02-15 14:35:52,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:52,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1358548775, now seen corresponding path program 12 times [2022-02-15 14:35:52,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:52,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38035011] [2022-02-15 14:35:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:52,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:52,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:52,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38035011] [2022-02-15 14:35:52,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38035011] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:52,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049843350] [2022-02-15 14:35:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:35:52,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:52,560 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:52,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 14:35:52,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:35:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:52,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:52,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:52,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049843350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:52,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:52,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 14:35:52,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798850224] [2022-02-15 14:35:52,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 14:35:52,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 14:35:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 14:35:52,706 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:53,173 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-02-15 14:35:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 14:35:53,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:53,182 INFO L225 Difference]: With dead ends: 2268 [2022-02-15 14:35:53,182 INFO L226 Difference]: Without dead ends: 2268 [2022-02-15 14:35:53,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 14:35:53,183 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 227 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:53,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 168 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:35:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-02-15 14:35:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-02-15 14:35:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-02-15 14:35:53,207 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-02-15 14:35:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:53,207 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-02-15 14:35:53,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-02-15 14:35:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:53,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:53,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:53,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:53,425 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 [2022-02-15 14:35:53,425 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2143462869, now seen corresponding path program 13 times [2022-02-15 14:35:53,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:53,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623731869] [2022-02-15 14:35:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:53,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:53,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:53,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623731869] [2022-02-15 14:35:53,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623731869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:53,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118807689] [2022-02-15 14:35:53,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:35:53,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:53,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:53,470 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:53,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 14:35:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:53,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:53,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:53,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118807689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:53,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:53,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 14:35:53,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644569814] [2022-02-15 14:35:53,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:53,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 14:35:53,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 14:35:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-15 14:35:53,638 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:54,185 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-02-15 14:35:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 14:35:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:54,195 INFO L225 Difference]: With dead ends: 2256 [2022-02-15 14:35:54,195 INFO L226 Difference]: Without dead ends: 2256 [2022-02-15 14:35:54,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 14:35:54,196 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:54,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 158 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:35:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-02-15 14:35:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-02-15 14:35:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-02-15 14:35:54,224 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-02-15 14:35:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:54,224 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-02-15 14:35:54,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-02-15 14:35:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:54,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:54,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:54,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:54,444 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 [2022-02-15 14:35:54,444 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:54,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1763448965, now seen corresponding path program 14 times [2022-02-15 14:35:54,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:54,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333484560] [2022-02-15 14:35:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:54,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:54,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:54,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333484560] [2022-02-15 14:35:54,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333484560] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:54,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754280180] [2022-02-15 14:35:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:35:54,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:54,483 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:54,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 14:35:54,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:35:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:54,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:54,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:54,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754280180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:54,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:54,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-15 14:35:54,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107282076] [2022-02-15 14:35:54,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:54,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 14:35:54,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:54,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 14:35:54,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:35:54,646 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:54,945 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-02-15 14:35:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 14:35:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:54,949 INFO L225 Difference]: With dead ends: 1611 [2022-02-15 14:35:54,949 INFO L226 Difference]: Without dead ends: 1611 [2022-02-15 14:35:54,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:35:54,950 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 188 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:54,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 152 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:35:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-02-15 14:35:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-02-15 14:35:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-02-15 14:35:54,972 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-02-15 14:35:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:54,972 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-02-15 14:35:54,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-02-15 14:35:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:54,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:54,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:54,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:55,187 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 [2022-02-15 14:35:55,187 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1205384683, now seen corresponding path program 15 times [2022-02-15 14:35:55,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:55,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014955342] [2022-02-15 14:35:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:55,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:55,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:55,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014955342] [2022-02-15 14:35:55,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014955342] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:55,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190947702] [2022-02-15 14:35:55,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:35:55,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:55,224 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:55,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 14:35:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 14:35:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:55,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:55,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190947702] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:55,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:55,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 14:35:55,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267110651] [2022-02-15 14:35:55,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:55,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 14:35:55,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 14:35:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-15 14:35:55,373 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:55,890 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-02-15 14:35:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 14:35:55,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:55,900 INFO L225 Difference]: With dead ends: 2408 [2022-02-15 14:35:55,900 INFO L226 Difference]: Without dead ends: 2404 [2022-02-15 14:35:55,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:35:55,901 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 264 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:55,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 165 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:35:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-02-15 14:35:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-02-15 14:35:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-02-15 14:35:55,930 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-02-15 14:35:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:55,930 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-02-15 14:35:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-02-15 14:35:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:55,932 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:55,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:55,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:56,145 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 [2022-02-15 14:35:56,146 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:56,146 INFO L85 PathProgramCache]: Analyzing trace with hash 287738009, now seen corresponding path program 16 times [2022-02-15 14:35:56,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:56,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515802799] [2022-02-15 14:35:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:56,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:56,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:56,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515802799] [2022-02-15 14:35:56,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515802799] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:56,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707676971] [2022-02-15 14:35:56,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:35:56,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:56,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:56,181 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:56,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 14:35:56,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:35:56,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:56,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:56,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:56,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:56,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707676971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:56,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:56,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 14:35:56,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251791178] [2022-02-15 14:35:56,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:56,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:35:56,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:35:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:35:56,382 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:57,285 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-02-15 14:35:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 14:35:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:57,294 INFO L225 Difference]: With dead ends: 3509 [2022-02-15 14:35:57,294 INFO L226 Difference]: Without dead ends: 3509 [2022-02-15 14:35:57,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:35:57,296 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 427 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:57,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 278 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:35:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-02-15 14:35:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-02-15 14:35:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-02-15 14:35:57,361 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-02-15 14:35:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:57,361 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-02-15 14:35:57,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-02-15 14:35:57,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:57,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:57,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:57,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:57,580 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 [2022-02-15 14:35:57,580 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:57,580 INFO L85 PathProgramCache]: Analyzing trace with hash -767639385, now seen corresponding path program 17 times [2022-02-15 14:35:57,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:57,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681796060] [2022-02-15 14:35:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:57,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:57,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:57,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681796060] [2022-02-15 14:35:57,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681796060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:57,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042409253] [2022-02-15 14:35:57,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:35:57,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:57,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:57,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 14:35:57,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 14:35:57,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:57,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:57,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042409253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:57,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:57,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 14:35:57,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938558436] [2022-02-15 14:35:57,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:57,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:35:57,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:35:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:35:57,819 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:59,032 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-02-15 14:35:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 14:35:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:59,039 INFO L225 Difference]: With dead ends: 3211 [2022-02-15 14:35:59,039 INFO L226 Difference]: Without dead ends: 3207 [2022-02-15 14:35:59,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:35:59,041 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 421 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:59,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 288 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 14:35:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-02-15 14:35:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-02-15 14:35:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-02-15 14:35:59,071 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-02-15 14:35:59,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:59,071 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-02-15 14:35:59,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-02-15 14:35:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:59,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:59,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:59,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:59,287 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 [2022-02-15 14:35:59,287 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1330941631, now seen corresponding path program 3 times [2022-02-15 14:35:59,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:59,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180538123] [2022-02-15 14:35:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:59,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:59,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:59,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180538123] [2022-02-15 14:35:59,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180538123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:59,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939220162] [2022-02-15 14:35:59,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:35:59,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:59,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:59,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:59,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 14:35:59,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 14:35:59,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 14:35:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:59,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:35:59,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939220162] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:59,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:59,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-15 14:35:59,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984642115] [2022-02-15 14:35:59,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:59,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 14:35:59,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:59,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 14:35:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-15 14:35:59,464 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:35:59,579 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-02-15 14:35:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 14:35:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:35:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:35:59,582 INFO L225 Difference]: With dead ends: 1333 [2022-02-15 14:35:59,582 INFO L226 Difference]: Without dead ends: 1333 [2022-02-15 14:35:59,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:35:59,583 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:35:59,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 61 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:35:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-02-15 14:35:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-02-15 14:35:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-02-15 14:35:59,600 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-02-15 14:35:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:35:59,600 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-02-15 14:35:59,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:35:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-02-15 14:35:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:35:59,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:35:59,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:35:59,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 14:35:59,818 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 [2022-02-15 14:35:59,818 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:35:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:35:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash -400741887, now seen corresponding path program 18 times [2022-02-15 14:35:59,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:35:59,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430945691] [2022-02-15 14:35:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:35:59,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:35:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:35:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:59,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:35:59,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430945691] [2022-02-15 14:35:59,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430945691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:35:59,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366009231] [2022-02-15 14:35:59,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:35:59,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:35:59,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:35:59,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:35:59,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 14:35:59,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:35:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:35:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:35:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:35:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:59,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:35:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:35:59,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366009231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:35:59,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:35:59,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-15 14:35:59,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370603290] [2022-02-15 14:35:59,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:35:59,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:35:59,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:35:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:35:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:35:59,995 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:00,363 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-02-15 14:36:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 14:36:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:00,383 INFO L225 Difference]: With dead ends: 2129 [2022-02-15 14:36:00,383 INFO L226 Difference]: Without dead ends: 2129 [2022-02-15 14:36:00,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 14:36:00,384 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:00,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 131 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:36:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-02-15 14:36:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-02-15 14:36:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-02-15 14:36:00,415 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-02-15 14:36:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:00,415 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-02-15 14:36:00,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-02-15 14:36:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:00,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:00,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:00,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:00,631 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 [2022-02-15 14:36:00,632 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1501937565, now seen corresponding path program 19 times [2022-02-15 14:36:00,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:00,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595000711] [2022-02-15 14:36:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:00,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:00,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:00,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595000711] [2022-02-15 14:36:00,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595000711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:00,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70462470] [2022-02-15 14:36:00,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:36:00,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:00,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:00,664 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:00,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 14:36:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:00,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:00,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:00,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70462470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:00,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:00,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 14:36:00,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494919978] [2022-02-15 14:36:00,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:00,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:36:00,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:36:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:36:00,797 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:01,139 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-02-15 14:36:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 14:36:01,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:01,144 INFO L225 Difference]: With dead ends: 2262 [2022-02-15 14:36:01,144 INFO L226 Difference]: Without dead ends: 2262 [2022-02-15 14:36:01,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 14:36:01,144 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:01,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 115 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:36:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-02-15 14:36:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-02-15 14:36:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-02-15 14:36:01,170 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-02-15 14:36:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:01,170 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-02-15 14:36:01,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-02-15 14:36:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:01,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:01,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:01,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:01,387 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 [2022-02-15 14:36:01,387 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:01,388 INFO L85 PathProgramCache]: Analyzing trace with hash 418914909, now seen corresponding path program 20 times [2022-02-15 14:36:01,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:01,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920377936] [2022-02-15 14:36:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:01,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:01,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:01,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920377936] [2022-02-15 14:36:01,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920377936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:01,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422111520] [2022-02-15 14:36:01,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:36:01,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:01,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:01,469 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:01,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 14:36:01,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:36:01,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:01,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:01,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422111520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:01,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:01,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-15 14:36:01,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412971287] [2022-02-15 14:36:01,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:01,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:36:01,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:36:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:36:01,629 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:01,859 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-02-15 14:36:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 14:36:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:01,863 INFO L225 Difference]: With dead ends: 1474 [2022-02-15 14:36:01,863 INFO L226 Difference]: Without dead ends: 1464 [2022-02-15 14:36:01,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:36:01,864 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 90 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:36:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-02-15 14:36:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-02-15 14:36:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-02-15 14:36:01,889 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-02-15 14:36:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:01,889 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-02-15 14:36:01,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-02-15 14:36:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:01,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:01,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:01,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:02,107 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 [2022-02-15 14:36:02,107 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1846909987, now seen corresponding path program 21 times [2022-02-15 14:36:02,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:02,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525971301] [2022-02-15 14:36:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:02,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:02,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:02,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525971301] [2022-02-15 14:36:02,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525971301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:02,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827373538] [2022-02-15 14:36:02,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:36:02,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:02,148 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:02,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 14:36:02,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:36:02,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:02,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:02,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827373538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:02,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:02,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-15 14:36:02,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635725909] [2022-02-15 14:36:02,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:02,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 14:36:02,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 14:36:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 14:36:02,281 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:02,589 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-02-15 14:36:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 14:36:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:02,594 INFO L225 Difference]: With dead ends: 2318 [2022-02-15 14:36:02,594 INFO L226 Difference]: Without dead ends: 2314 [2022-02-15 14:36:02,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:36:02,595 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 220 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:02,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 99 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:36:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-02-15 14:36:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-02-15 14:36:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-02-15 14:36:02,621 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-02-15 14:36:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:02,622 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-02-15 14:36:02,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-02-15 14:36:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:02,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:02,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:02,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:02,839 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 [2022-02-15 14:36:02,840 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1526355169, now seen corresponding path program 22 times [2022-02-15 14:36:02,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:02,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16046840] [2022-02-15 14:36:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:02,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:02,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:02,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16046840] [2022-02-15 14:36:02,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16046840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:02,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722983324] [2022-02-15 14:36:02,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:36:02,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:02,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:02,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 14:36:02,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:36:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:02,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:03,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722983324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:03,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:03,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-15 14:36:03,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222084798] [2022-02-15 14:36:03,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:03,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 14:36:03,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:03,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 14:36:03,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-15 14:36:03,020 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:03,321 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-02-15 14:36:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 14:36:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:03,327 INFO L225 Difference]: With dead ends: 2302 [2022-02-15 14:36:03,327 INFO L226 Difference]: Without dead ends: 2290 [2022-02-15 14:36:03,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-02-15 14:36:03,328 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:03,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 124 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:36:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-02-15 14:36:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-02-15 14:36:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-02-15 14:36:03,355 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-02-15 14:36:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:03,355 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-02-15 14:36:03,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-02-15 14:36:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:03,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:03,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:03,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:03,574 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 [2022-02-15 14:36:03,575 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1528032797, now seen corresponding path program 23 times [2022-02-15 14:36:03,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:03,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626643458] [2022-02-15 14:36:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:03,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:03,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:03,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626643458] [2022-02-15 14:36:03,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626643458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:03,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609695705] [2022-02-15 14:36:03,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:36:03,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:03,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:03,608 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:03,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 14:36:03,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:36:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:03,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:03,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609695705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:03,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:03,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 14:36:03,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903409260] [2022-02-15 14:36:03,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:03,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:36:03,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:03,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:36:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:36:03,793 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:04,657 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-02-15 14:36:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 14:36:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:04,668 INFO L225 Difference]: With dead ends: 4760 [2022-02-15 14:36:04,668 INFO L226 Difference]: Without dead ends: 4760 [2022-02-15 14:36:04,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:36:04,669 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 316 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:04,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 262 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 14:36:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-02-15 14:36:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-02-15 14:36:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 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) [2022-02-15 14:36:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-02-15 14:36:04,725 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-02-15 14:36:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:04,725 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-02-15 14:36:04,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-02-15 14:36:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:04,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:04,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:04,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:04,947 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 [2022-02-15 14:36:04,947 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1238029855, now seen corresponding path program 24 times [2022-02-15 14:36:04,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:04,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127559473] [2022-02-15 14:36:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:04,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:04,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:04,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127559473] [2022-02-15 14:36:04,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127559473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:04,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930951252] [2022-02-15 14:36:04,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:36:04,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:04,985 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:04,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 14:36:05,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:36:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:05,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:05,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930951252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:05,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:05,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 14:36:05,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858982857] [2022-02-15 14:36:05,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:05,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:36:05,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:36:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:36:05,179 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:05,880 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-02-15 14:36:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 14:36:05,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:05,888 INFO L225 Difference]: With dead ends: 4260 [2022-02-15 14:36:05,888 INFO L226 Difference]: Without dead ends: 4260 [2022-02-15 14:36:05,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 14:36:05,889 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 478 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:05,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 173 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-02-15 14:36:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-02-15 14:36:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-02-15 14:36:05,930 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-02-15 14:36:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:05,930 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-02-15 14:36:05,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-02-15 14:36:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:05,932 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:05,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:05,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:06,148 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 [2022-02-15 14:36:06,148 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash 922639019, now seen corresponding path program 25 times [2022-02-15 14:36:06,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:06,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661728590] [2022-02-15 14:36:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:06,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:06,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:06,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661728590] [2022-02-15 14:36:06,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661728590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:06,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474365759] [2022-02-15 14:36:06,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:36:06,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:06,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:06,184 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:06,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 14:36:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:06,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:06,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:06,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474365759] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:06,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:06,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-15 14:36:06,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773044705] [2022-02-15 14:36:06,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:06,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 14:36:06,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 14:36:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:36:06,363 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:06,987 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-02-15 14:36:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 14:36:06,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:06,995 INFO L225 Difference]: With dead ends: 4602 [2022-02-15 14:36:06,995 INFO L226 Difference]: Without dead ends: 4602 [2022-02-15 14:36:06,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 14:36:06,996 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 344 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:06,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 199 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-02-15 14:36:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-02-15 14:36:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-02-15 14:36:07,037 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-02-15 14:36:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:07,037 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-02-15 14:36:07,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-02-15 14:36:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:07,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:07,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:07,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:07,259 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 [2022-02-15 14:36:07,259 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1994955993, now seen corresponding path program 26 times [2022-02-15 14:36:07,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:07,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41088279] [2022-02-15 14:36:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:07,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:07,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:07,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41088279] [2022-02-15 14:36:07,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41088279] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:07,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624523019] [2022-02-15 14:36:07,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:36:07,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:07,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:07,300 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:07,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 14:36:07,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:36:07,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:07,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:07,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:07,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624523019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:07,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:07,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-02-15 14:36:07,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647865982] [2022-02-15 14:36:07,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:07,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 14:36:07,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 14:36:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-15 14:36:07,455 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:07,986 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-02-15 14:36:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:36:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:07,993 INFO L225 Difference]: With dead ends: 4348 [2022-02-15 14:36:07,994 INFO L226 Difference]: Without dead ends: 4344 [2022-02-15 14:36:07,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 14:36:07,994 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 380 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:07,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 175 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-02-15 14:36:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-02-15 14:36:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-02-15 14:36:08,037 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-02-15 14:36:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:08,037 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-02-15 14:36:08,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-02-15 14:36:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:08,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:08,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:08,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-15 14:36:08,255 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 [2022-02-15 14:36:08,255 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -10861731, now seen corresponding path program 27 times [2022-02-15 14:36:08,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:08,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128037309] [2022-02-15 14:36:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:08,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:08,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:08,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128037309] [2022-02-15 14:36:08,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128037309] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:08,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845485946] [2022-02-15 14:36:08,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:36:08,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:08,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:08,291 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:08,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 14:36:08,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:36:08,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:08,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:08,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:08,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845485946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:08,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:08,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 14:36:08,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171350390] [2022-02-15 14:36:08,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:08,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:36:08,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:36:08,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:36:08,482 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:09,057 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-02-15 14:36:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:36:09,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:09,065 INFO L225 Difference]: With dead ends: 4035 [2022-02-15 14:36:09,065 INFO L226 Difference]: Without dead ends: 4035 [2022-02-15 14:36:09,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 14:36:09,066 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:09,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 225 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-02-15 14:36:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-02-15 14:36:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-02-15 14:36:09,105 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-02-15 14:36:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:09,105 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-02-15 14:36:09,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-02-15 14:36:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:09,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:09,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:09,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-15 14:36:09,311 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 [2022-02-15 14:36:09,312 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1066239125, now seen corresponding path program 28 times [2022-02-15 14:36:09,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:09,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962874989] [2022-02-15 14:36:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:09,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:09,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:09,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962874989] [2022-02-15 14:36:09,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962874989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:09,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860960953] [2022-02-15 14:36:09,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:36:09,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:09,354 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:09,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 14:36:09,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:36:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:09,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 14:36:09,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860960953] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:09,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:09,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 14:36:09,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065862076] [2022-02-15 14:36:09,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:09,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 14:36:09,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 14:36:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-15 14:36:09,534 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:10,262 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-02-15 14:36:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 14:36:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:10,268 INFO L225 Difference]: With dead ends: 3794 [2022-02-15 14:36:10,268 INFO L226 Difference]: Without dead ends: 3790 [2022-02-15 14:36:10,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 14:36:10,269 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 386 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:10,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 172 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-02-15 14:36:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-02-15 14:36:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-02-15 14:36:10,302 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-02-15 14:36:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:10,302 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-02-15 14:36:10,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-02-15 14:36:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:10,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:10,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:10,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:10,509 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 [2022-02-15 14:36:10,509 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:10,510 INFO L85 PathProgramCache]: Analyzing trace with hash 286172165, now seen corresponding path program 29 times [2022-02-15 14:36:10,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:10,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301282832] [2022-02-15 14:36:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:10,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:10,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:10,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301282832] [2022-02-15 14:36:10,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301282832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:10,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086904039] [2022-02-15 14:36:10,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:36:10,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:10,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:10,555 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:10,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 14:36:10,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:36:10,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:10,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:10,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086904039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:10,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:10,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 14:36:10,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305627057] [2022-02-15 14:36:10,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:10,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 14:36:10,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 14:36:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-15 14:36:10,700 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:11,328 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-02-15 14:36:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 14:36:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:11,336 INFO L225 Difference]: With dead ends: 3978 [2022-02-15 14:36:11,336 INFO L226 Difference]: Without dead ends: 3978 [2022-02-15 14:36:11,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 14:36:11,337 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:11,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 186 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-02-15 14:36:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-02-15 14:36:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-02-15 14:36:11,382 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-02-15 14:36:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:11,382 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-02-15 14:36:11,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-02-15 14:36:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:11,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:11,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:11,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:11,600 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 [2022-02-15 14:36:11,600 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1358489139, now seen corresponding path program 30 times [2022-02-15 14:36:11,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:11,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506232350] [2022-02-15 14:36:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:11,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:11,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:11,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506232350] [2022-02-15 14:36:11,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506232350] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:11,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704918912] [2022-02-15 14:36:11,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:36:11,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:11,648 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:11,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 14:36:11,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:36:11,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:11,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:11,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:11,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704918912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:11,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:11,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 14:36:11,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121170463] [2022-02-15 14:36:11,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:11,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 14:36:11,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:11,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 14:36:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-15 14:36:11,784 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:12,273 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-02-15 14:36:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 14:36:12,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:12,280 INFO L225 Difference]: With dead ends: 3706 [2022-02-15 14:36:12,280 INFO L226 Difference]: Without dead ends: 3702 [2022-02-15 14:36:12,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 14:36:12,281 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 227 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:12,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 152 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:36:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-02-15 14:36:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-02-15 14:36:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-02-15 14:36:12,316 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-02-15 14:36:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:12,316 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-02-15 14:36:12,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-02-15 14:36:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:12,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:12,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:12,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-15 14:36:12,519 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 [2022-02-15 14:36:12,519 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1675641631, now seen corresponding path program 31 times [2022-02-15 14:36:12,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:12,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729516938] [2022-02-15 14:36:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:12,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:12,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:12,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729516938] [2022-02-15 14:36:12,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729516938] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:12,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317814674] [2022-02-15 14:36:12,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:36:12,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:12,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:12,560 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:12,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 14:36:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:12,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:12,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317814674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:12,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:12,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-15 14:36:12,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491534064] [2022-02-15 14:36:12,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:12,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 14:36:12,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 14:36:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-15 14:36:12,711 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:13,235 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-02-15 14:36:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:36:13,236 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:13,244 INFO L225 Difference]: With dead ends: 4114 [2022-02-15 14:36:13,244 INFO L226 Difference]: Without dead ends: 4102 [2022-02-15 14:36:13,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 14:36:13,245 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 333 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:13,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 169 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:36:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-02-15 14:36:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-02-15 14:36:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-02-15 14:36:13,287 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-02-15 14:36:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:13,287 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-02-15 14:36:13,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-02-15 14:36:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:13,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:13,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:13,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-15 14:36:13,506 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 [2022-02-15 14:36:13,507 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:13,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1003355295, now seen corresponding path program 32 times [2022-02-15 14:36:13,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:13,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756358271] [2022-02-15 14:36:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:13,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:13,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:13,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756358271] [2022-02-15 14:36:13,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756358271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:13,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626547999] [2022-02-15 14:36:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:36:13,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:13,560 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:13,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:36:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:13,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:13,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 14:36:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:13,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:13,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626547999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:13,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:13,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-15 14:36:13,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398985056] [2022-02-15 14:36:13,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:13,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 14:36:13,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:13,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 14:36:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:36:13,787 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:14,411 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-02-15 14:36:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 14:36:14,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 24 [2022-02-15 14:36:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:14,418 INFO L225 Difference]: With dead ends: 3694 [2022-02-15 14:36:14,418 INFO L226 Difference]: Without dead ends: 3694 [2022-02-15 14:36:14,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 14:36:14,419 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 349 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:14,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 269 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-02-15 14:36:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-02-15 14:36:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-02-15 14:36:14,461 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-02-15 14:36:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:14,461 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-02-15 14:36:14,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-02-15 14:36:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:14,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:14,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:14,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-15 14:36:14,665 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 [2022-02-15 14:36:14,665 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:14,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2058732689, now seen corresponding path program 33 times [2022-02-15 14:36:14,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:14,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183013101] [2022-02-15 14:36:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:14,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:14,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:14,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183013101] [2022-02-15 14:36:14,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183013101] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:14,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468980354] [2022-02-15 14:36:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:36:14,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:14,704 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:14,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 14:36:14,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:36:14,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:14,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:14,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468980354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:14,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:14,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-15 14:36:14,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610628617] [2022-02-15 14:36:14,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:14,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 14:36:14,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 14:36:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-15 14:36:14,885 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:15,659 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-02-15 14:36:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 14:36:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 24 [2022-02-15 14:36:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:15,667 INFO L225 Difference]: With dead ends: 3420 [2022-02-15 14:36:15,667 INFO L226 Difference]: Without dead ends: 3416 [2022-02-15 14:36:15,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 14:36:15,668 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 355 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:15,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 205 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-02-15 14:36:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-02-15 14:36:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-02-15 14:36:15,708 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-02-15 14:36:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:15,708 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-02-15 14:36:15,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-02-15 14:36:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 14:36:15,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:15,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:15,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 14:36:15,925 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 [2022-02-15 14:36:15,925 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:15,925 INFO L85 PathProgramCache]: Analyzing trace with hash -575597751, now seen corresponding path program 34 times [2022-02-15 14:36:15,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:15,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384159580] [2022-02-15 14:36:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:15,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:15,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:15,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384159580] [2022-02-15 14:36:15,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384159580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:15,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421500178] [2022-02-15 14:36:15,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:36:15,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:15,965 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:15,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 14:36:15,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:36:15,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 14:36:15,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:16,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:16,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421500178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:36:16,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:36:16,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-15 14:36:16,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485188742] [2022-02-15 14:36:16,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:36:16,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 14:36:16,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:36:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 14:36:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-02-15 14:36:16,126 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:36:16,728 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-02-15 14:36:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 14:36:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 14:36:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:36:16,734 INFO L225 Difference]: With dead ends: 3256 [2022-02-15 14:36:16,734 INFO L226 Difference]: Without dead ends: 3244 [2022-02-15 14:36:16,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 14:36:16,735 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 242 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 14:36:16,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 197 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 14:36:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-02-15 14:36:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-02-15 14:36:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-02-15 14:36:16,772 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-02-15 14:36:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:36:16,773 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-02-15 14:36:16,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:36:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-02-15 14:36:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:36:16,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:36:16,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:36:16,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-15 14:36:16,976 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 [2022-02-15 14:36:16,977 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:36:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:36:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash 201587259, now seen corresponding path program 4 times [2022-02-15 14:36:16,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:36:16,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390845485] [2022-02-15 14:36:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:36:16,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:36:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:36:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:17,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:36:17,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390845485] [2022-02-15 14:36:17,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390845485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:36:17,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165876731] [2022-02-15 14:36:17,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:36:17,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:36:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:36:17,649 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:36:17,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 14:36:17,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:36:17,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:36:17,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:36:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:36:18,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:36:18,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:36:18,493 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 120 treesize of output 84 [2022-02-15 14:36:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:36:18,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:36:19,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:36:19,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:36:19,672 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-02-15 14:37:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:37:07,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165876731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:37:07,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:37:07,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:37:07,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188955922] [2022-02-15 14:37:07,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:37:07,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:37:07,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:37:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:37:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:37:07,153 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) 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) [2022-02-15 14:37:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:37:13,704 INFO L93 Difference]: Finished difference Result 3711 states and 11925 transitions. [2022-02-15 14:37:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 14:37:13,704 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) 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 26 [2022-02-15 14:37:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:37:13,711 INFO L225 Difference]: With dead ends: 3711 [2022-02-15 14:37:13,711 INFO L226 Difference]: Without dead ends: 3651 [2022-02-15 14:37:13,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=796, Invalid=3494, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 14:37:13,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 516 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:37:13,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 248 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1079 Invalid, 0 Unknown, 82 Unchecked, 0.9s Time] [2022-02-15 14:37:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2022-02-15 14:37:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 1749. [2022-02-15 14:37:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.5720823798627004) internal successors, (6244), 1748 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:37:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6244 transitions. [2022-02-15 14:37:13,744 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6244 transitions. Word has length 26 [2022-02-15 14:37:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:37:13,744 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6244 transitions. [2022-02-15 14:37:13,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) 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) [2022-02-15 14:37:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6244 transitions. [2022-02-15 14:37:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:37:13,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:37:13,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:37:13,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 14:37:13,955 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 [2022-02-15 14:37:13,955 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:37:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:37:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1826810757, now seen corresponding path program 5 times [2022-02-15 14:37:13,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:37:13,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10253941] [2022-02-15 14:37:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:37:13,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:37:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:37:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:37:14,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:37:14,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10253941] [2022-02-15 14:37:14,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10253941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:37:14,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308987263] [2022-02-15 14:37:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:37:14,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:37:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:37:14,868 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:37:14,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 14:37:14,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:37:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:37:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:37:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:37:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:37:15,731 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 14:37:15,731 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 205 treesize of output 116 [2022-02-15 14:37:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:37:15,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:37:16,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:37:17,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:37:17,017 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-02-15 14:37:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:37:45,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308987263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:37:45,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:37:45,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:37:45,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191640213] [2022-02-15 14:37:45,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:37:45,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:37:45,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:37:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:37:45,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:37:45,721 INFO L87 Difference]: Start difference. First operand 1749 states and 6244 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-02-15 14:37:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:37:52,689 INFO L93 Difference]: Finished difference Result 3933 states and 12668 transitions. [2022-02-15 14:37:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 14:37:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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 26 [2022-02-15 14:37:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:37:52,697 INFO L225 Difference]: With dead ends: 3933 [2022-02-15 14:37:52,697 INFO L226 Difference]: Without dead ends: 3903 [2022-02-15 14:37:52,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=828, Invalid=3594, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 14:37:52,698 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 523 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:37:52,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 313 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1339 Invalid, 0 Unknown, 61 Unchecked, 1.1s Time] [2022-02-15 14:37:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-02-15 14:37:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 1825. [2022-02-15 14:37:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1824 states have (on average 3.5822368421052633) internal successors, (6534), 1824 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:37:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 6534 transitions. [2022-02-15 14:37:52,735 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 6534 transitions. Word has length 26 [2022-02-15 14:37:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:37:52,736 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 6534 transitions. [2022-02-15 14:37:52,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-02-15 14:37:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 6534 transitions. [2022-02-15 14:37:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:37:52,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:37:52,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:37:52,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 14:37:52,939 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 [2022-02-15 14:37:52,939 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:37:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:37:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash -235381449, now seen corresponding path program 35 times [2022-02-15 14:37:52,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:37:52,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486975181] [2022-02-15 14:37:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:37:52,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:37:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:37:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:37:53,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:37:53,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486975181] [2022-02-15 14:37:53,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486975181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:37:53,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326857373] [2022-02-15 14:37:53,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:37:53,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:37:53,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:37:53,593 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:37:53,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 14:37:53,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:37:53,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:37:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:37:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:37:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:37:54,414 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-02-15 14:37:54,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 367 treesize of output 163 [2022-02-15 14:37:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:37:54,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:37:55,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:37:55,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:37:55,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:37:55,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:37:55,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 359 treesize of output 243 [2022-02-15 14:37:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:37:57,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326857373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:37:57,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:37:57,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 28 [2022-02-15 14:37:57,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502713863] [2022-02-15 14:37:57,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:37:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:37:57,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:37:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:37:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:37:57,109 INFO L87 Difference]: Start difference. First operand 1825 states and 6534 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) [2022-02-15 14:38:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:06,357 INFO L93 Difference]: Finished difference Result 3811 states and 12266 transitions. [2022-02-15 14:38:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 14:38:06,357 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 26 [2022-02-15 14:38:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:06,364 INFO L225 Difference]: With dead ends: 3811 [2022-02-15 14:38:06,364 INFO L226 Difference]: Without dead ends: 3766 [2022-02-15 14:38:06,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=860, Invalid=5782, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 14:38:06,365 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 442 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:06,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 485 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2109 Invalid, 0 Unknown, 195 Unchecked, 1.6s Time] [2022-02-15 14:38:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-02-15 14:38:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 2078. [2022-02-15 14:38:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.5185363505055367) internal successors, (7308), 2077 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 7308 transitions. [2022-02-15 14:38:06,410 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 7308 transitions. Word has length 26 [2022-02-15 14:38:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:06,410 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 7308 transitions. [2022-02-15 14:38:06,410 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) [2022-02-15 14:38:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 7308 transitions. [2022-02-15 14:38:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:38:06,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:06,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:06,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-15 14:38:06,614 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 [2022-02-15 14:38:06,615 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash 569665727, now seen corresponding path program 6 times [2022-02-15 14:38:06,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:06,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8353816] [2022-02-15 14:38:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:06,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:07,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:07,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8353816] [2022-02-15 14:38:07,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8353816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:07,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429953738] [2022-02-15 14:38:07,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:38:07,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:07,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:07,329 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:38:07,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 14:38:07,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:38:07,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:38:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:38:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:38:08,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:38:08,007 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 120 treesize of output 84 [2022-02-15 14:38:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:08,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:38:09,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:09,206 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 247 [2022-02-15 14:38:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:50,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429953738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:38:50,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:38:50,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 14:38:50,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938561941] [2022-02-15 14:38:50,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:38:50,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:38:50,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:38:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:38:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:38:50,901 INFO L87 Difference]: Start difference. First operand 2078 states and 7308 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) 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) [2022-02-15 14:38:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:38:56,884 INFO L93 Difference]: Finished difference Result 3852 states and 12395 transitions. [2022-02-15 14:38:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 14:38:56,885 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) 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 26 [2022-02-15 14:38:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:38:56,892 INFO L225 Difference]: With dead ends: 3852 [2022-02-15 14:38:56,892 INFO L226 Difference]: Without dead ends: 3822 [2022-02-15 14:38:56,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 14:38:56,893 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 427 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:38:56,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 352 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1079 Invalid, 0 Unknown, 510 Unchecked, 0.8s Time] [2022-02-15 14:38:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-02-15 14:38:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2123. [2022-02-15 14:38:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.5089538171536288) internal successors, (7446), 2122 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:38:56,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7446 transitions. [2022-02-15 14:38:56,936 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7446 transitions. Word has length 26 [2022-02-15 14:38:56,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:38:56,936 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7446 transitions. [2022-02-15 14:38:56,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) 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) [2022-02-15 14:38:56,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7446 transitions. [2022-02-15 14:38:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:38:56,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:38:56,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:38:56,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-15 14:38:57,141 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 [2022-02-15 14:38:57,141 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:38:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:38:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash -941338781, now seen corresponding path program 7 times [2022-02-15 14:38:57,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:38:57,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002084353] [2022-02-15 14:38:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:38:57,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:38:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:57,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:38:57,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002084353] [2022-02-15 14:38:57,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002084353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:38:57,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701235192] [2022-02-15 14:38:57,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:38:57,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:38:57,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:38:57,799 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:38:57,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 14:38:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:38:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:38:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:38:58,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:38:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:38:58,570 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 120 treesize of output 84 [2022-02-15 14:38:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:38:58,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:38:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:38:59,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:38:59,765 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-02-15 14:39:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:22,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701235192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:39:22,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:39:22,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:39:22,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169239289] [2022-02-15 14:39:22,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:39:22,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:39:22,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:39:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:39:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:39:22,630 INFO L87 Difference]: Start difference. First operand 2123 states and 7446 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) 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) [2022-02-15 14:39:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:39:28,241 INFO L93 Difference]: Finished difference Result 4333 states and 13845 transitions. [2022-02-15 14:39:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 14:39:28,241 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) 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 26 [2022-02-15 14:39:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:39:28,248 INFO L225 Difference]: With dead ends: 4333 [2022-02-15 14:39:28,248 INFO L226 Difference]: Without dead ends: 4273 [2022-02-15 14:39:28,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 14:39:28,249 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 407 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:39:28,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 308 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 14:39:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2022-02-15 14:39:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 2151. [2022-02-15 14:39:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.5051162790697674) internal successors, (7536), 2150 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:39:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7536 transitions. [2022-02-15 14:39:28,292 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7536 transitions. Word has length 26 [2022-02-15 14:39:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:39:28,292 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 7536 transitions. [2022-02-15 14:39:28,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) 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) [2022-02-15 14:39:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7536 transitions. [2022-02-15 14:39:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:39:28,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:39:28,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:39:28,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-15 14:39:28,511 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 [2022-02-15 14:39:28,511 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:39:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:39:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1325230499, now seen corresponding path program 8 times [2022-02-15 14:39:28,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:39:28,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397404003] [2022-02-15 14:39:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:39:28,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:39:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:39:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:29,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:39:29,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397404003] [2022-02-15 14:39:29,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397404003] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:39:29,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034195900] [2022-02-15 14:39:29,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:39:29,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:39:29,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:39:29,378 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:39:29,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 14:39:29,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:39:29,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:39:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:39:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:39:30,030 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-02-15 14:39:30,031 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 136 [2022-02-15 14:39:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:39:30,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:39:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:39:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:39:31,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:39:31,987 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 295 treesize of output 237 [2022-02-15 14:40:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:07,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034195900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:07,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:07,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-15 14:40:07,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922937502] [2022-02-15 14:40:07,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:07,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 14:40:07,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:07,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 14:40:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:40:07,495 INFO L87 Difference]: Start difference. First operand 2151 states and 7536 transitions. Second operand has 28 states, 28 states have (on average 2.5) 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) [2022-02-15 14:40:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:20,096 INFO L93 Difference]: Finished difference Result 4496 states and 14868 transitions. [2022-02-15 14:40:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 14:40:20,097 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) 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 26 [2022-02-15 14:40:20,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:20,105 INFO L225 Difference]: With dead ends: 4496 [2022-02-15 14:40:20,105 INFO L226 Difference]: Without dead ends: 4466 [2022-02-15 14:40:20,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1282, Invalid=5858, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 14:40:20,106 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 486 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:20,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 604 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1485 Invalid, 0 Unknown, 931 Unchecked, 1.2s Time] [2022-02-15 14:40:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2022-02-15 14:40:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 2187. [2022-02-15 14:40:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 3.515096065873742) internal successors, (7684), 2186 states have internal predecessors, (7684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:40:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 7684 transitions. [2022-02-15 14:40:20,150 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 7684 transitions. Word has length 26 [2022-02-15 14:40:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:20,150 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 7684 transitions. [2022-02-15 14:40:20,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) 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) [2022-02-15 14:40:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 7684 transitions. [2022-02-15 14:40:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:40:20,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:20,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:20,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:20,354 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 [2022-02-15 14:40:20,354 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash -612179209, now seen corresponding path program 9 times [2022-02-15 14:40:20,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:20,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281106367] [2022-02-15 14:40:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:20,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:21,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:21,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281106367] [2022-02-15 14:40:21,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281106367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:21,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450318953] [2022-02-15 14:40:21,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:40:21,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:21,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:21,189 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:21,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 14:40:21,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:40:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-15 14:40:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:22,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:40:22,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:40:22,045 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 120 treesize of output 84 [2022-02-15 14:40:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:22,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:23,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:40:23,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:40:23,102 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-02-15 14:40:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:39,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450318953] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:40:39,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:40:39,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2022-02-15 14:40:39,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544409810] [2022-02-15 14:40:39,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:40:39,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:40:39,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:40:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:40:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:40:39,368 INFO L87 Difference]: Start difference. First operand 2187 states and 7684 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) 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) [2022-02-15 14:40:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:40:50,524 INFO L93 Difference]: Finished difference Result 5136 states and 16323 transitions. [2022-02-15 14:40:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 14:40:50,524 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) 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 26 [2022-02-15 14:40:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:40:50,534 INFO L225 Difference]: With dead ends: 5136 [2022-02-15 14:40:50,534 INFO L226 Difference]: Without dead ends: 5076 [2022-02-15 14:40:50,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1120, Invalid=4886, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 14:40:50,535 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 619 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 14:40:50,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 417 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1725 Invalid, 0 Unknown, 1 Unchecked, 1.7s Time] [2022-02-15 14:40:50,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2022-02-15 14:40:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 2218. [2022-02-15 14:40:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.527740189445196) internal successors, (7821), 2217 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) [2022-02-15 14:40:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7821 transitions. [2022-02-15 14:40:50,593 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7821 transitions. Word has length 26 [2022-02-15 14:40:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:40:50,593 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7821 transitions. [2022-02-15 14:40:50,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) 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) [2022-02-15 14:40:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7821 transitions. [2022-02-15 14:40:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:40:50,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:40:50,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:40:50,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-15 14:40:50,815 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 [2022-02-15 14:40:50,816 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:40:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:40:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -779988301, now seen corresponding path program 10 times [2022-02-15 14:40:50,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:40:50,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285813301] [2022-02-15 14:40:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:40:50,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:40:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:40:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:51,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:40:51,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285813301] [2022-02-15 14:40:51,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285813301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:40:51,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181131653] [2022-02-15 14:40:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 14:40:51,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:40:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:40:51,444 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:40:51,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 14:40:51,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 14:40:51,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:40:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:40:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:40:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:40:52,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:40:52,160 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 120 treesize of output 84 [2022-02-15 14:40:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:40:52,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:40:53,367 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-15 14:40:53,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 295 treesize of output 245 [2022-02-15 14:41:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:03,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181131653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:41:03,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:41:03,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 24 [2022-02-15 14:41:03,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557091045] [2022-02-15 14:41:03,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:41:03,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 14:41:03,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:41:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 14:41:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 14:41:03,596 INFO L87 Difference]: Start difference. First operand 2218 states and 7821 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:41:05,798 INFO L93 Difference]: Finished difference Result 3323 states and 10969 transitions. [2022-02-15 14:41:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 14:41:05,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 14:41:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:41:05,805 INFO L225 Difference]: With dead ends: 3323 [2022-02-15 14:41:05,805 INFO L226 Difference]: Without dead ends: 3308 [2022-02-15 14:41:05,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 14:41:05,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:41:05,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 257 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1027 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2022-02-15 14:41:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2022-02-15 14:41:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 2224. [2022-02-15 14:41:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 3.5276653171390016) internal successors, (7842), 2223 states have internal predecessors, (7842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 7842 transitions. [2022-02-15 14:41:05,842 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 7842 transitions. Word has length 26 [2022-02-15 14:41:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:41:05,842 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 7842 transitions. [2022-02-15 14:41:05,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:41:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 7842 transitions. [2022-02-15 14:41:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:41:05,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:41:05,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:41:05,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-15 14:41:06,046 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 [2022-02-15 14:41:06,046 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:41:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:41:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1447462967, now seen corresponding path program 11 times [2022-02-15 14:41:06,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:41:06,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092024093] [2022-02-15 14:41:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:41:06,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:41:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:41:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:06,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:41:06,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092024093] [2022-02-15 14:41:06,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092024093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:41:06,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74452092] [2022-02-15 14:41:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 14:41:06,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:41:06,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:41:06,684 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:41:06,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 14:41:06,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 14:41:06,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:41:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:41:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:41:07,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:41:07,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:07,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 96 [2022-02-15 14:41:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:41:07,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:41:08,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:41:08,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:41:08,741 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-02-15 14:42:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:13,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74452092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:42:13,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:42:13,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 14:42:13,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057741246] [2022-02-15 14:42:13,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:42:13,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 14:42:13,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:42:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 14:42:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 14:42:13,998 INFO L87 Difference]: Start difference. First operand 2224 states and 7842 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) 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) [2022-02-15 14:42:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:42:42,079 INFO L93 Difference]: Finished difference Result 5709 states and 18272 transitions. [2022-02-15 14:42:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 14:42:42,080 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) 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 26 [2022-02-15 14:42:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:42:42,089 INFO L225 Difference]: With dead ends: 5709 [2022-02-15 14:42:42,089 INFO L226 Difference]: Without dead ends: 5635 [2022-02-15 14:42:42,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=1923, Invalid=9207, Unknown=0, NotChecked=0, Total=11130 [2022-02-15 14:42:42,090 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 695 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 2753 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 14:42:42,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 663 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2753 Invalid, 0 Unknown, 307 Unchecked, 2.5s Time] [2022-02-15 14:42:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2022-02-15 14:42:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 2294. [2022-02-15 14:42:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.554295682511993) internal successors, (8150), 2293 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:42:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8150 transitions. [2022-02-15 14:42:42,147 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8150 transitions. Word has length 26 [2022-02-15 14:42:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:42:42,148 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8150 transitions. [2022-02-15 14:42:42,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) 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) [2022-02-15 14:42:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8150 transitions. [2022-02-15 14:42:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:42:42,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:42:42,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:42:42,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-15 14:42:42,368 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 [2022-02-15 14:42:42,368 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:42:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:42:42,368 INFO L85 PathProgramCache]: Analyzing trace with hash 950741607, now seen corresponding path program 12 times [2022-02-15 14:42:42,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:42:42,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264986574] [2022-02-15 14:42:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:42:42,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:42:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:42:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:43,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:42:43,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264986574] [2022-02-15 14:42:43,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264986574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:42:43,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154755438] [2022-02-15 14:42:43,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:42:43,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:42:43,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:42:43,045 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:42:43,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 14:42:43,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:42:43,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:42:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 14:42:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:42:43,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:42:43,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:42:43,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 92 [2022-02-15 14:42:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:42:44,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:42:45,247 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-15 14:42:45,248 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 346 treesize of output 284 [2022-02-15 14:43:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:03,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154755438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:43:03,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:43:03,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-15 14:43:03,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881152581] [2022-02-15 14:43:03,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:43:03,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:43:03,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:43:03,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:43:03,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:43:03,348 INFO L87 Difference]: Start difference. First operand 2294 states and 8150 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-02-15 14:43:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:43:19,079 INFO L93 Difference]: Finished difference Result 4837 states and 15745 transitions. [2022-02-15 14:43:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 14:43:19,079 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-02-15 14:43:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:43:19,088 INFO L225 Difference]: With dead ends: 4837 [2022-02-15 14:43:19,089 INFO L226 Difference]: Without dead ends: 4807 [2022-02-15 14:43:19,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1372, Invalid=8134, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 14:43:19,089 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 522 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 14:43:19,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 467 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 14:43:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-02-15 14:43:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2302. [2022-02-15 14:43:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.5567144719687094) internal successors, (8184), 2301 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:43:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8184 transitions. [2022-02-15 14:43:19,136 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8184 transitions. Word has length 26 [2022-02-15 14:43:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:43:19,137 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 8184 transitions. [2022-02-15 14:43:19,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-02-15 14:43:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8184 transitions. [2022-02-15 14:43:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:43:19,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:43:19,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:43:19,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-15 14:43:19,341 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 [2022-02-15 14:43:19,341 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:43:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:43:19,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1845411963, now seen corresponding path program 13 times [2022-02-15 14:43:19,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:43:19,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240699737] [2022-02-15 14:43:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:43:19,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:43:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:19,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:43:19,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240699737] [2022-02-15 14:43:19,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240699737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:43:19,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875939054] [2022-02-15 14:43:19,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:43:19,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:43:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:43:19,945 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:43:19,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 14:43:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:43:19,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:43:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:43:20,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:43:20,815 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-02-15 14:43:20,816 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 240 treesize of output 135 [2022-02-15 14:43:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:43:21,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:43:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:43:21,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:43:21,962 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-02-15 14:44:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:06,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875939054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:06,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:06,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 14:44:06,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097238079] [2022-02-15 14:44:06,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:44:06,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:44:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:44:06,615 INFO L87 Difference]: Start difference. First operand 2302 states and 8184 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-02-15 14:44:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:21,532 INFO L93 Difference]: Finished difference Result 8575 states and 27772 transitions. [2022-02-15 14:44:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 14:44:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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 26 [2022-02-15 14:44:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:21,550 INFO L225 Difference]: With dead ends: 8575 [2022-02-15 14:44:21,550 INFO L226 Difference]: Without dead ends: 8530 [2022-02-15 14:44:21,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1324, Invalid=5648, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 14:44:21,551 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 567 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:21,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 465 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1388 Invalid, 0 Unknown, 583 Unchecked, 1.4s Time] [2022-02-15 14:44:21,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8530 states. [2022-02-15 14:44:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8530 to 2325. [2022-02-15 14:44:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 3.5654044750430294) internal successors, (8286), 2324 states have internal predecessors, (8286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 8286 transitions. [2022-02-15 14:44:21,642 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 8286 transitions. Word has length 26 [2022-02-15 14:44:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:21,643 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 8286 transitions. [2022-02-15 14:44:21,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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) [2022-02-15 14:44:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 8286 transitions. [2022-02-15 14:44:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:44:21,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:21,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:21,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-02-15 14:44:21,847 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 [2022-02-15 14:44:21,847 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -899173769, now seen corresponding path program 36 times [2022-02-15 14:44:21,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:21,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294409973] [2022-02-15 14:44:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:21,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:22,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:22,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294409973] [2022-02-15 14:44:22,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294409973] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:22,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538073991] [2022-02-15 14:44:22,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 14:44:22,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:22,366 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:22,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 14:44:22,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 14:44:22,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-15 14:44:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:44:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:44:23,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:23,284 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 138 treesize of output 118 [2022-02-15 14:44:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:26,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:29,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:44:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:44:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:44:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:44:29,400 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 359 treesize of output 213 [2022-02-15 14:44:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:30,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538073991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:30,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:30,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-02-15 14:44:30,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060667120] [2022-02-15 14:44:30,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:30,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:44:30,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:44:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=696, Unknown=1, NotChecked=0, Total=812 [2022-02-15 14:44:30,746 INFO L87 Difference]: Start difference. First operand 2325 states and 8286 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) 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) [2022-02-15 14:44:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:44:40,964 INFO L93 Difference]: Finished difference Result 4419 states and 14621 transitions. [2022-02-15 14:44:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 14:44:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) 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 26 [2022-02-15 14:44:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:44:40,973 INFO L225 Difference]: With dead ends: 4419 [2022-02-15 14:44:40,973 INFO L226 Difference]: Without dead ends: 4398 [2022-02-15 14:44:40,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1071, Invalid=6237, Unknown=2, NotChecked=0, Total=7310 [2022-02-15 14:44:40,974 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 387 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1130 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 14:44:40,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 636 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1830 Invalid, 0 Unknown, 1130 Unchecked, 1.4s Time] [2022-02-15 14:44:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-02-15 14:44:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 2432. [2022-02-15 14:44:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 3.5549156725627316) internal successors, (8642), 2431 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:44:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 8642 transitions. [2022-02-15 14:44:41,026 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 8642 transitions. Word has length 26 [2022-02-15 14:44:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:44:41,026 INFO L470 AbstractCegarLoop]: Abstraction has 2432 states and 8642 transitions. [2022-02-15 14:44:41,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) 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) [2022-02-15 14:44:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 8642 transitions. [2022-02-15 14:44:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:44:41,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:44:41,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:44:41,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-15 14:44:41,231 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 [2022-02-15 14:44:41,231 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:44:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:44:41,232 INFO L85 PathProgramCache]: Analyzing trace with hash -859684957, now seen corresponding path program 14 times [2022-02-15 14:44:41,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:44:41,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211235530] [2022-02-15 14:44:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:44:41,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:44:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:44:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:42,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:44:42,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211235530] [2022-02-15 14:44:42,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211235530] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:44:42,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419002753] [2022-02-15 14:44:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:44:42,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:44:42,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:44:42,011 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:44:42,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 14:44:42,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:44:42,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:44:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:44:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:44:43,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:44:43,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:43,242 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 120 treesize of output 100 [2022-02-15 14:44:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:44,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:44:45,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:44:45,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:44:45,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:44:45,328 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 277 treesize of output 235 [2022-02-15 14:44:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:44:49,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419002753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:44:49,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:44:49,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-02-15 14:44:49,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504935094] [2022-02-15 14:44:49,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:44:49,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 14:44:49,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:44:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 14:44:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-15 14:44:49,298 INFO L87 Difference]: Start difference. First operand 2432 states and 8642 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) 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) [2022-02-15 14:45:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:45:21,727 INFO L93 Difference]: Finished difference Result 6481 states and 22193 transitions. [2022-02-15 14:45:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-15 14:45:21,728 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) 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 26 [2022-02-15 14:45:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:45:21,741 INFO L225 Difference]: With dead ends: 6481 [2022-02-15 14:45:21,741 INFO L226 Difference]: Without dead ends: 6451 [2022-02-15 14:45:21,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7873 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=2818, Invalid=17488, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 14:45:21,742 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 559 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 14:45:21,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 738 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1928 Invalid, 0 Unknown, 733 Unchecked, 1.8s Time] [2022-02-15 14:45:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2022-02-15 14:45:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 2588. [2022-02-15 14:45:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2587 states have (on average 3.5879396984924625) internal successors, (9282), 2587 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:45:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 9282 transitions. [2022-02-15 14:45:21,819 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 9282 transitions. Word has length 26 [2022-02-15 14:45:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:45:21,819 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 9282 transitions. [2022-02-15 14:45:21,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) 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) [2022-02-15 14:45:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 9282 transitions. [2022-02-15 14:45:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:45:21,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:45:21,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:45:21,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-15 14:45:22,024 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 [2022-02-15 14:45:22,024 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:45:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:45:22,025 INFO L85 PathProgramCache]: Analyzing trace with hash -948313093, now seen corresponding path program 15 times [2022-02-15 14:45:22,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:45:22,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002364877] [2022-02-15 14:45:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:45:22,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:45:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:45:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:22,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:45:22,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002364877] [2022-02-15 14:45:22,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002364877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:45:22,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859762295] [2022-02-15 14:45:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 14:45:22,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:45:22,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:45:22,652 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:45:22,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 14:45:22,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 14:45:22,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:45:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:45:22,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:45:23,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:45:23,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:23,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 96 [2022-02-15 14:45:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:23,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:45:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:45:24,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:45:24,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-02-15 14:45:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:45:57,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859762295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:45:57,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:45:57,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 14:45:57,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037478725] [2022-02-15 14:45:57,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:45:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 14:45:57,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:45:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 14:45:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-02-15 14:45:57,975 INFO L87 Difference]: Start difference. First operand 2588 states and 9282 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:14,550 INFO L93 Difference]: Finished difference Result 7226 states and 22911 transitions. [2022-02-15 14:46:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 14:46:14,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-15 14:46:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:14,565 INFO L225 Difference]: With dead ends: 7226 [2022-02-15 14:46:14,565 INFO L226 Difference]: Without dead ends: 7196 [2022-02-15 14:46:14,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 36 SyntacticMatches, 21 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2101, Invalid=7999, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 14:46:14,566 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 770 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:14,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 686 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2140 Invalid, 0 Unknown, 268 Unchecked, 2.0s Time] [2022-02-15 14:46:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7196 states. [2022-02-15 14:46:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7196 to 2668. [2022-02-15 14:46:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 3.6141732283464565) internal successors, (9639), 2667 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 9639 transitions. [2022-02-15 14:46:14,648 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 9639 transitions. Word has length 26 [2022-02-15 14:46:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:14,648 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 9639 transitions. [2022-02-15 14:46:14,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 9639 transitions. [2022-02-15 14:46:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:46:14,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:14,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:14,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-15 14:46:14,854 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 [2022-02-15 14:46:14,854 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:14,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:14,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1335219989, now seen corresponding path program 37 times [2022-02-15 14:46:14,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:14,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932963019] [2022-02-15 14:46:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:14,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:15,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:15,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932963019] [2022-02-15 14:46:15,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932963019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:15,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931016184] [2022-02-15 14:46:15,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 14:46:15,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:15,409 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:15,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 14:46:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:15,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-15 14:46:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:46:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:46:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:46:16,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 14:46:16,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 106 [2022-02-15 14:46:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:16,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:17,969 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:46:17,970 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 359 treesize of output 249 [2022-02-15 14:46:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:26,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931016184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:26,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:26,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-02-15 14:46:26,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604494585] [2022-02-15 14:46:26,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:26,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 14:46:26,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 14:46:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-02-15 14:46:26,786 INFO L87 Difference]: Start difference. First operand 2668 states and 9639 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2022-02-15 14:46:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:46:46,621 INFO L93 Difference]: Finished difference Result 5826 states and 19475 transitions. [2022-02-15 14:46:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 14:46:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 26 [2022-02-15 14:46:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:46:46,633 INFO L225 Difference]: With dead ends: 5826 [2022-02-15 14:46:46,634 INFO L226 Difference]: Without dead ends: 5764 [2022-02-15 14:46:46,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=2294, Invalid=13456, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 14:46:46,635 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 466 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:46:46,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 607 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2537 Invalid, 0 Unknown, 145 Unchecked, 2.1s Time] [2022-02-15 14:46:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2022-02-15 14:46:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 2775. [2022-02-15 14:46:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.627974044700793) internal successors, (10064), 2774 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:46:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 10064 transitions. [2022-02-15 14:46:46,709 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 10064 transitions. Word has length 26 [2022-02-15 14:46:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:46:46,709 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 10064 transitions. [2022-02-15 14:46:46,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2022-02-15 14:46:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 10064 transitions. [2022-02-15 14:46:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 14:46:46,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:46:46,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:46:46,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-15 14:46:46,914 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 [2022-02-15 14:46:46,914 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 14:46:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:46:46,915 INFO L85 PathProgramCache]: Analyzing trace with hash -673180245, now seen corresponding path program 38 times [2022-02-15 14:46:46,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:46:46,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211919457] [2022-02-15 14:46:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:46:46,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:46:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:46:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:47,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:46:47,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211919457] [2022-02-15 14:46:47,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211919457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 14:46:47,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598681928] [2022-02-15 14:46:47,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 14:46:47,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 14:46:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:46:47,402 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 14:46:47,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 14:46:47,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 14:46:47,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 14:46:47,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-15 14:46:47,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 14:46:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:46:48,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-15 14:46:48,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 14:46:48,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 118 [2022-02-15 14:46:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:48,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 14:46:49,678 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-15 14:46:49,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 359 treesize of output 249 [2022-02-15 14:46:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:46:54,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598681928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 14:46:54,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 14:46:54,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2022-02-15 14:46:54,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120673498] [2022-02-15 14:46:54,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 14:46:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 14:46:54,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:46:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 14:46:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-15 14:46:54,010 INFO L87 Difference]: Start difference. First operand 2775 states and 10064 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) [2022-02-15 14:47:15,382 WARN L228 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 188 DAG size of output: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-15 14:47:25,733 WARN L228 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 208 DAG size of output: 177 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-15 14:47:38,720 WARN L228 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 220 DAG size of output: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-15 14:47:47,773 WARN L228 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 193 DAG size of output: 161 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-15 14:47:57,856 WARN L228 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 190 DAG size of output: 159 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-15 14:48:06,535 WARN L228 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 211 DAG size of output: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-15 14:48:16,678 WARN L228 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 172 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-15 14:48:24,302 WARN L228 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 191 DAG size of output: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-02-15 14:48:29,800 WARN L244 SmtUtils]: Removed 11 from assertion stack [2022-02-15 14:48:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-15 14:48:29,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8885 ImplicationChecksByTransitivity, 90.4s TimeCoverageRelationStatistics Valid=3300, Invalid=18162, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 14:48:29,802 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 575 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:29,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 345 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1813 Invalid, 0 Unknown, 149 Unchecked, 1.6s Time] [2022-02-15 14:48:29,803 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-15 14:48:29,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-15 14:48:29,838 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 14:48:29,838 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 14:48:30,003 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 [2022-02-15 14:48:30,004 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (2775states) and FLOYD_HOARE automaton (currently 126 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 170 for 4564ms.. [2022-02-15 14:48:30,005 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-15 14:48:30,005 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-15 14:48:30,005 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-15 14:48:30,007 INFO L732 BasicCegarLoop]: Path program histogram: [38, 15, 1, 1] [2022-02-15 14:48:30,009 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 14:48:30,009 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 14:48:30,010 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:48:30 BasicIcfg [2022-02-15 14:48:30,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 14:48:30,011 INFO L158 Benchmark]: Toolchain (without parser) took 782169.52ms. Allocated memory was 183.5MB in the beginning and 494.9MB in the end (delta: 311.4MB). Free memory was 140.9MB in the beginning and 318.8MB in the end (delta: -177.9MB). Peak memory consumption was 135.8MB. Max. memory is 8.0GB. [2022-02-15 14:48:30,011 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:48:30,011 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.20ms. Allocated memory is still 183.5MB. Free memory was 140.8MB in the beginning and 139.3MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-15 14:48:30,011 INFO L158 Benchmark]: Boogie Preprocessor took 10.34ms. Allocated memory is still 183.5MB. Free memory was 139.3MB in the beginning and 138.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 14:48:30,011 INFO L158 Benchmark]: RCFGBuilder took 229.73ms. Allocated memory is still 183.5MB. Free memory was 138.2MB in the beginning and 128.7MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-15 14:48:30,011 INFO L158 Benchmark]: TraceAbstraction took 781907.08ms. Allocated memory was 183.5MB in the beginning and 494.9MB in the end (delta: 311.4MB). Free memory was 128.2MB in the beginning and 318.8MB in the end (delta: -190.5MB). Peak memory consumption was 122.2MB. Max. memory is 8.0GB. [2022-02-15 14:48:30,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.20ms. Allocated memory is still 183.5MB. Free memory was 140.8MB in the beginning and 139.3MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.34ms. Allocated memory is still 183.5MB. Free memory was 139.3MB in the beginning and 138.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 229.73ms. Allocated memory is still 183.5MB. Free memory was 138.2MB in the beginning and 128.7MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 781907.08ms. Allocated memory was 183.5MB in the beginning and 494.9MB in the end (delta: 311.4MB). Free memory was 128.2MB in the beginning and 318.8MB in the end (delta: -190.5MB). Peak memory consumption was 122.2MB. 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: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2775states) and FLOYD_HOARE automaton (currently 126 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 170 for 4564ms.. - TimeoutResultAtElement [Line: 61]: 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 (2775states) and FLOYD_HOARE automaton (currently 126 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 170 for 4564ms.. - TimeoutResultAtElement [Line: 61]: 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 (2775states) and FLOYD_HOARE automaton (currently 126 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 170 for 4564ms.. - TimeoutResultAtElement [Line: 62]: 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 (2775states) and FLOYD_HOARE automaton (currently 126 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 170 for 4564ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 781.8s, OverallIterations: 55, TraceHistogramMax: 2, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.2s, AutomataDifference: 317.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17893 SdHoareTripleChecker+Valid, 33.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17893 mSDsluCounter, 14068 SdHoareTripleChecker+Invalid, 28.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5717 IncrementalHoareTripleChecker+Unchecked, 24599 mSDsCounter, 3570 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46888 IncrementalHoareTripleChecker+Invalid, 56175 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3570 mSolverCounterUnsat, 1319 mSDtfsCounter, 46888 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5055 GetRequests, 1982 SyntacticMatches, 137 SemanticMatches, 2935 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 76293 ImplicationChecksByTransitivity, 305.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2775occurred in iteration=54, InterpolantAutomatonStates: 2399, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 92917 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 449.1s InterpolantComputationTime, 2618 NumberOfCodeBlocks, 2618 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3747 ConstructedInterpolants, 67 QuantifiedInterpolants, 119189 SizeOfPredicates, 576 NumberOfNonLiveVariables, 3610 ConjunctsInSsa, 880 ConjunctsInUnsatCore, 161 InterpolantComputations, 2 PerfectInterpolantSequences, 173/787 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