/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/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:56:04,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:56:04,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:56:04,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:56:04,206 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 [2022-03-03 19:56:04,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:56:04,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:56:04,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:56:04,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:56:04,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:56:04,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:56:04,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:56:04,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:56:04,229 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:56:04,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:56:04,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:56:04,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:56:04,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:56:04,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:56:04,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:56:04,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:56:04,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:56:04,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:56:04,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:56:04,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:56:04,231 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:56:04,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:56:04,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:56:04,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:56:04,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:56:04,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:56:04,434 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:56:04,436 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:56:04,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2022-03-03 19:56:04,437 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2022-03-03 19:56:04,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:56:04,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:56:04,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:56:04,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:56:04,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:56:04,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,485 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:56:04,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:56:04,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:56:04,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:56:04,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:56:04,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:56:04,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:56:04,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:56:04,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:56:04,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/1) ... [2022-03-03 19:56:04,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:56:04,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:04,526 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) [2022-03-03 19:56:04,528 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 [2022-03-03 19:56:04,550 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:56:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:56:04,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:56:04,550 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:56:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:56:04,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:56:04,550 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:56:04,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:56:04,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:56:04,551 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:56:04,584 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:56:04,585 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:56:04,666 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:56:04,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:56:04,676 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:56:04,677 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:56:04 BoogieIcfgContainer [2022-03-03 19:56:04,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:56:04,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:56:04,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:56:04,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:56:04,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:56:04" (1/2) ... [2022-03-03 19:56:04,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23119123 and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:56:04, skipping insertion in model container [2022-03-03 19:56:04,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:56:04" (2/2) ... [2022-03-03 19:56:04,697 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2022-03-03 19:56:04,700 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:56:04,700 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:56:04,700 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:56:04,700 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:56:04,740 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 19:56:04,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:56:04,776 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:56:04,776 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 19:56:04,782 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-03-03 19:56:04,800 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:56:04,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:04,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:04,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:04,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1415635565, now seen corresponding path program 1 times [2022-03-03 19:56:04,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:04,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111790762] [2022-03-03 19:56:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:04,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:04,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:04,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111790762] [2022-03-03 19:56:04,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111790762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:56:04,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:56:04,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:56:04,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087708797] [2022-03-03 19:56:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:56:04,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:56:04,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:56:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:56:04,946 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:04,984 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2022-03-03 19:56:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:56:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 19:56:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:04,991 INFO L225 Difference]: With dead ends: 104 [2022-03-03 19:56:04,992 INFO L226 Difference]: Without dead ends: 87 [2022-03-03 19:56:04,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:56:04,996 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:04,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:56:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-03 19:56:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2022-03-03 19:56:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2022-03-03 19:56:05,045 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2022-03-03 19:56:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:05,046 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2022-03-03 19:56:05,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2022-03-03 19:56:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:56:05,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:05,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:56:05,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1368071626, now seen corresponding path program 1 times [2022-03-03 19:56:05,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:05,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620637503] [2022-03-03 19:56:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:05,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:05,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:05,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620637503] [2022-03-03 19:56:05,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620637503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:56:05,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:56:05,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:56:05,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876367477] [2022-03-03 19:56:05,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:56:05,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:56:05,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:56:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:56:05,118 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2022-03-03 19:56:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:05,151 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2022-03-03 19:56:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:56:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2022-03-03 19:56:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:05,152 INFO L225 Difference]: With dead ends: 91 [2022-03-03 19:56:05,152 INFO L226 Difference]: Without dead ends: 83 [2022-03-03 19:56:05,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:56:05,154 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:05,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:56:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-03 19:56:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-03 19:56:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2022-03-03 19:56:05,164 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2022-03-03 19:56:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:05,164 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2022-03-03 19:56:05,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2022-03-03 19:56:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2022-03-03 19:56:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:56:05,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:05,166 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] [2022-03-03 19:56:05,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:56:05,166 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1835440604, now seen corresponding path program 1 times [2022-03-03 19:56:05,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:05,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768723038] [2022-03-03 19:56:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:05,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:05,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:05,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768723038] [2022-03-03 19:56:05,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768723038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:05,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335884067] [2022-03-03 19:56:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:05,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:05,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:05,340 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) [2022-03-03 19:56:05,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:56:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:05,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:56:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:05,563 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 13 treesize of output 9 [2022-03-03 19:56:05,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:56:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:05,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:05,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:05,750 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 15 treesize of output 19 [2022-03-03 19:56:05,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:05,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335884067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:05,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:05,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-03-03 19:56:05,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346066490] [2022-03-03 19:56:05,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:05,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:56:05,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:56:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:56:05,846 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:05,931 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2022-03-03 19:56:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:56:05,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:56:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:05,932 INFO L225 Difference]: With dead ends: 154 [2022-03-03 19:56:05,932 INFO L226 Difference]: Without dead ends: 137 [2022-03-03 19:56:05,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:56:05,933 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:05,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:56:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-03 19:56:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2022-03-03 19:56:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2022-03-03 19:56:05,942 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2022-03-03 19:56:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:05,942 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2022-03-03 19:56:05,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2022-03-03 19:56:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:56:05,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:05,943 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, 1] [2022-03-03 19:56:05,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:06,162 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 [2022-03-03 19:56:06,163 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2029618617, now seen corresponding path program 2 times [2022-03-03 19:56:06,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:06,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454096259] [2022-03-03 19:56:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:06,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:06,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:06,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454096259] [2022-03-03 19:56:06,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454096259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:06,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392752758] [2022-03-03 19:56:06,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:06,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:06,235 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) [2022-03-03 19:56:06,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:56:06,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:06,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:06,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:56:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:06,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:06,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392752758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:06,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:06,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-03 19:56:06,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818534906] [2022-03-03 19:56:06,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:06,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:56:06,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:56:06,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:56:06,389 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2022-03-03 19:56:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:06,459 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2022-03-03 19:56:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:56:06,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 27 [2022-03-03 19:56:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:06,463 INFO L225 Difference]: With dead ends: 284 [2022-03-03 19:56:06,463 INFO L226 Difference]: Without dead ends: 264 [2022-03-03 19:56:06,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:56:06,466 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:06,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:56:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-03 19:56:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2022-03-03 19:56:06,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2022-03-03 19:56:06,488 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2022-03-03 19:56:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:06,488 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2022-03-03 19:56:06,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2022-03-03 19:56:06,488 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2022-03-03 19:56:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:06,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:06,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:06,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:06,690 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 [2022-03-03 19:56:06,690 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:06,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:06,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1131642343, now seen corresponding path program 3 times [2022-03-03 19:56:06,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:06,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804191410] [2022-03-03 19:56:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:06,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:06,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:06,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804191410] [2022-03-03 19:56:06,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804191410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:06,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831524973] [2022-03-03 19:56:06,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:06,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:06,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:06,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:56:07,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:07,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:56:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:07,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:07,191 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 29 treesize of output 27 [2022-03-03 19:56:07,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:07,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-03-03 19:56:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:07,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:08,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:08,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2022-03-03 19:56:08,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:08,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831524973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:08,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:08,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-03-03 19:56:08,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760437524] [2022-03-03 19:56:08,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:08,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:56:08,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:08,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:56:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:56:08,378 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2022-03-03 19:56:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:09,187 INFO L93 Difference]: Finished difference Result 536 states and 1142 transitions. [2022-03-03 19:56:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:56:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:09,190 INFO L225 Difference]: With dead ends: 536 [2022-03-03 19:56:09,190 INFO L226 Difference]: Without dead ends: 533 [2022-03-03 19:56:09,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:56:09,192 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:09,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 468 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 313 Invalid, 0 Unknown, 427 Unchecked, 0.1s Time] [2022-03-03 19:56:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-03 19:56:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 276. [2022-03-03 19:56:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1272727272727274) internal successors, (585), 275 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 585 transitions. [2022-03-03 19:56:09,205 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 585 transitions. Word has length 32 [2022-03-03 19:56:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:09,206 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 585 transitions. [2022-03-03 19:56:09,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2022-03-03 19:56:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 585 transitions. [2022-03-03 19:56:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:09,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:09,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:09,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-03 19:56:09,423 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 [2022-03-03 19:56:09,424 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1215898163, now seen corresponding path program 4 times [2022-03-03 19:56:09,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:09,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804819026] [2022-03-03 19:56:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:09,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:09,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:09,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804819026] [2022-03-03 19:56:09,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804819026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:09,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183095905] [2022-03-03 19:56:09,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:09,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:09,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:09,667 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) [2022-03-03 19:56:09,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:56:09,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:09,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:09,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:09,891 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 29 treesize of output 27 [2022-03-03 19:56:10,043 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:56:10,044 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 22 treesize of output 10 [2022-03-03 19:56:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:10,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:10,314 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:10,314 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 34 treesize of output 56 [2022-03-03 19:56:10,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:10,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183095905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:10,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:10,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-03-03 19:56:10,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244808926] [2022-03-03 19:56:10,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:10,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:56:10,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:56:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:56:10,473 INFO L87 Difference]: Start difference. First operand 276 states and 585 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2022-03-03 19:56:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:11,095 INFO L93 Difference]: Finished difference Result 546 states and 1148 transitions. [2022-03-03 19:56:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:56:11,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 32 [2022-03-03 19:56:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:11,098 INFO L225 Difference]: With dead ends: 546 [2022-03-03 19:56:11,098 INFO L226 Difference]: Without dead ends: 529 [2022-03-03 19:56:11,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:56:11,099 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:11,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 880 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2022-03-03 19:56:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-03 19:56:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 281. [2022-03-03 19:56:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1285714285714286) internal successors, (596), 280 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 596 transitions. [2022-03-03 19:56:11,107 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 596 transitions. Word has length 32 [2022-03-03 19:56:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:11,107 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 596 transitions. [2022-03-03 19:56:11,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2022-03-03 19:56:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 596 transitions. [2022-03-03 19:56:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:11,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:11,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:11,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:11,323 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 [2022-03-03 19:56:11,323 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash 307390119, now seen corresponding path program 5 times [2022-03-03 19:56:11,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:11,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549035472] [2022-03-03 19:56:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:11,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:11,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549035472] [2022-03-03 19:56:11,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549035472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:11,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880415176] [2022-03-03 19:56:11,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:11,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:11,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:11,558 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) [2022-03-03 19:56:11,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:56:11,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:11,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:11,887 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 24 treesize of output 24 [2022-03-03 19:56:11,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:11,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:11,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:11,988 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 22 treesize of output 10 [2022-03-03 19:56:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:12,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:12,270 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:12,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-03 19:56:12,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:12,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880415176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:12,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:12,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-03 19:56:12,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206133754] [2022-03-03 19:56:12,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:12,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:12,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:12,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:12,419 INFO L87 Difference]: Start difference. First operand 281 states and 596 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:12,613 INFO L93 Difference]: Finished difference Result 554 states and 1191 transitions. [2022-03-03 19:56:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:56:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:12,616 INFO L225 Difference]: With dead ends: 554 [2022-03-03 19:56:12,616 INFO L226 Difference]: Without dead ends: 527 [2022-03-03 19:56:12,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:56:12,617 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:12,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 108 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-03-03 19:56:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-03 19:56:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 317. [2022-03-03 19:56:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.1645569620253164) internal successors, (684), 316 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 684 transitions. [2022-03-03 19:56:12,624 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 684 transitions. Word has length 32 [2022-03-03 19:56:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:12,624 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 684 transitions. [2022-03-03 19:56:12,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 684 transitions. [2022-03-03 19:56:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:12,625 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:12,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:12,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:12,841 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 [2022-03-03 19:56:12,841 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1473211481, now seen corresponding path program 6 times [2022-03-03 19:56:12,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:12,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095611578] [2022-03-03 19:56:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:13,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:13,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095611578] [2022-03-03 19:56:13,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095611578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:13,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472244170] [2022-03-03 19:56:13,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:13,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:13,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:13,067 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) [2022-03-03 19:56:13,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:56:13,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:13,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:13,393 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 24 treesize of output 24 [2022-03-03 19:56:13,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:13,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:13,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,446 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 22 treesize of output 10 [2022-03-03 19:56:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:13,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:13,710 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:13,711 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 35 treesize of output 57 [2022-03-03 19:56:13,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:13,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472244170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:13,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:13,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-03 19:56:13,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061889126] [2022-03-03 19:56:13,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:13,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:13,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:13,823 INFO L87 Difference]: Start difference. First operand 317 states and 684 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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) [2022-03-03 19:56:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:14,012 INFO L93 Difference]: Finished difference Result 639 states and 1386 transitions. [2022-03-03 19:56:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:56:14,013 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:14,016 INFO L225 Difference]: With dead ends: 639 [2022-03-03 19:56:14,016 INFO L226 Difference]: Without dead ends: 607 [2022-03-03 19:56:14,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:56:14,016 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:14,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 220 Unchecked, 0.1s Time] [2022-03-03 19:56:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-03 19:56:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 324. [2022-03-03 19:56:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1393188854489162) internal successors, (691), 323 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 691 transitions. [2022-03-03 19:56:14,024 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 691 transitions. Word has length 32 [2022-03-03 19:56:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:14,024 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 691 transitions. [2022-03-03 19:56:14,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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) [2022-03-03 19:56:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 691 transitions. [2022-03-03 19:56:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:14,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:14,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:14,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:14,244 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 [2022-03-03 19:56:14,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1147796233, now seen corresponding path program 7 times [2022-03-03 19:56:14,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:14,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015265606] [2022-03-03 19:56:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:14,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:14,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015265606] [2022-03-03 19:56:14,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015265606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:14,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227698315] [2022-03-03 19:56:14,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:14,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:14,472 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) [2022-03-03 19:56:14,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:56:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:14,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:14,794 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 26 treesize of output 26 [2022-03-03 19:56:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:14,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:14,868 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 24 treesize of output 10 [2022-03-03 19:56:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:14,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:15,136 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:15,137 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 34 treesize of output 56 [2022-03-03 19:56:15,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:15,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227698315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:15,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:15,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-03-03 19:56:15,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345811684] [2022-03-03 19:56:15,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:15,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:15,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:15,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:15,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:15,271 INFO L87 Difference]: Start difference. First operand 324 states and 691 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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) [2022-03-03 19:56:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:15,471 INFO L93 Difference]: Finished difference Result 572 states and 1216 transitions. [2022-03-03 19:56:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:56:15,472 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:15,475 INFO L225 Difference]: With dead ends: 572 [2022-03-03 19:56:15,475 INFO L226 Difference]: Without dead ends: 548 [2022-03-03 19:56:15,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:56:15,477 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:15,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-03-03 19:56:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-03-03 19:56:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 393. [2022-03-03 19:56:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.1581632653061225) internal successors, (846), 392 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 846 transitions. [2022-03-03 19:56:15,484 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 846 transitions. Word has length 32 [2022-03-03 19:56:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:15,485 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 846 transitions. [2022-03-03 19:56:15,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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) [2022-03-03 19:56:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 846 transitions. [2022-03-03 19:56:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:15,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:15,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:15,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-03 19:56:15,699 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 [2022-03-03 19:56:15,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:15,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1369686285, now seen corresponding path program 8 times [2022-03-03 19:56:15,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:15,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826994138] [2022-03-03 19:56:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:15,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:15,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826994138] [2022-03-03 19:56:15,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826994138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:15,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208777564] [2022-03-03 19:56:15,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:15,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:15,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:15,928 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) [2022-03-03 19:56:15,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:56:15,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:15,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:16,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:16,260 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 26 treesize of output 26 [2022-03-03 19:56:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:16,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-03 19:56:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:16,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:16,592 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:16,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-03 19:56:16,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:16,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208777564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:16,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:16,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 29 [2022-03-03 19:56:16,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461323351] [2022-03-03 19:56:16,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:16,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:16,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:16,712 INFO L87 Difference]: Start difference. First operand 393 states and 846 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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) [2022-03-03 19:56:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:17,190 INFO L93 Difference]: Finished difference Result 743 states and 1622 transitions. [2022-03-03 19:56:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:56:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:17,194 INFO L225 Difference]: With dead ends: 743 [2022-03-03 19:56:17,194 INFO L226 Difference]: Without dead ends: 716 [2022-03-03 19:56:17,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:56:17,196 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:17,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 182 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 453 Invalid, 0 Unknown, 326 Unchecked, 0.2s Time] [2022-03-03 19:56:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-03 19:56:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 426. [2022-03-03 19:56:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1788235294117646) internal successors, (926), 425 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 926 transitions. [2022-03-03 19:56:17,212 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 926 transitions. Word has length 32 [2022-03-03 19:56:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:17,213 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 926 transitions. [2022-03-03 19:56:17,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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) [2022-03-03 19:56:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 926 transitions. [2022-03-03 19:56:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:17,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:17,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:17,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-03 19:56:17,431 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 [2022-03-03 19:56:17,432 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash -727791177, now seen corresponding path program 9 times [2022-03-03 19:56:17,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:17,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114292884] [2022-03-03 19:56:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:17,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:17,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:17,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114292884] [2022-03-03 19:56:17,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114292884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:17,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435176817] [2022-03-03 19:56:17,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:17,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:17,652 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) [2022-03-03 19:56:17,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:56:17,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:17,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:17,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:17,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:17,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:17,947 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 22 treesize of output 22 [2022-03-03 19:56:18,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:18,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:18,242 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 18 treesize of output 26 [2022-03-03 19:56:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:18,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:19,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:19,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2022-03-03 19:56:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:19,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435176817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:19,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:19,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 37 [2022-03-03 19:56:19,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752381133] [2022-03-03 19:56:19,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:19,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-03 19:56:19,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-03 19:56:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:56:19,748 INFO L87 Difference]: Start difference. First operand 426 states and 926 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:22,026 INFO L93 Difference]: Finished difference Result 1367 states and 2897 transitions. [2022-03-03 19:56:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 19:56:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:22,031 INFO L225 Difference]: With dead ends: 1367 [2022-03-03 19:56:22,031 INFO L226 Difference]: Without dead ends: 1312 [2022-03-03 19:56:22,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1210, Invalid=6800, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:56:22,033 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 598 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 749 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:22,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 396 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 903 Invalid, 0 Unknown, 749 Unchecked, 0.4s Time] [2022-03-03 19:56:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-03-03 19:56:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 562. [2022-03-03 19:56:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.229946524064171) internal successors, (1251), 561 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:22,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1251 transitions. [2022-03-03 19:56:22,046 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1251 transitions. Word has length 32 [2022-03-03 19:56:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:22,046 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1251 transitions. [2022-03-03 19:56:22,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1251 transitions. [2022-03-03 19:56:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:22,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:22,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:22,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:22,263 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 [2022-03-03 19:56:22,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:22,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:22,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1786574519, now seen corresponding path program 10 times [2022-03-03 19:56:22,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:22,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391433081] [2022-03-03 19:56:22,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:22,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:22,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:22,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391433081] [2022-03-03 19:56:22,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391433081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:22,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613779848] [2022-03-03 19:56:22,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:22,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:22,451 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) [2022-03-03 19:56:22,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:56:22,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:22,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:22,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:22,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:22,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-03 19:56:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:22,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:22,813 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 24 treesize of output 10 [2022-03-03 19:56:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:22,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:23,087 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:23,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-03 19:56:23,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:23,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613779848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:23,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:23,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-03 19:56:23,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452214410] [2022-03-03 19:56:23,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:23,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:23,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:23,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:23,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:23,219 INFO L87 Difference]: Start difference. First operand 562 states and 1251 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:23,445 INFO L93 Difference]: Finished difference Result 669 states and 1470 transitions. [2022-03-03 19:56:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:56:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:23,448 INFO L225 Difference]: With dead ends: 669 [2022-03-03 19:56:23,448 INFO L226 Difference]: Without dead ends: 652 [2022-03-03 19:56:23,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:56:23,449 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:23,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 111 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-03-03 19:56:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-03-03 19:56:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 584. [2022-03-03 19:56:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2315608919382504) internal successors, (1301), 583 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1301 transitions. [2022-03-03 19:56:23,458 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1301 transitions. Word has length 32 [2022-03-03 19:56:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:23,458 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1301 transitions. [2022-03-03 19:56:23,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1301 transitions. [2022-03-03 19:56:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:23,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:23,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:23,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:23,676 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 [2022-03-03 19:56:23,676 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash 112614937, now seen corresponding path program 11 times [2022-03-03 19:56:23,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:23,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147305049] [2022-03-03 19:56:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:23,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:23,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:23,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147305049] [2022-03-03 19:56:23,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147305049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:23,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576287481] [2022-03-03 19:56:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:23,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:23,879 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) [2022-03-03 19:56:23,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:56:23,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:23,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:24,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:24,171 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 24 treesize of output 24 [2022-03-03 19:56:24,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:24,266 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 22 treesize of output 10 [2022-03-03 19:56:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:24,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:24,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:24,543 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 33 treesize of output 57 [2022-03-03 19:56:24,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:24,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576287481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:24,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:24,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 34 [2022-03-03 19:56:24,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350573429] [2022-03-03 19:56:24,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:24,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:56:24,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:24,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:56:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:56:24,744 INFO L87 Difference]: Start difference. First operand 584 states and 1301 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:25,148 INFO L93 Difference]: Finished difference Result 969 states and 2149 transitions. [2022-03-03 19:56:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:56:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:25,151 INFO L225 Difference]: With dead ends: 969 [2022-03-03 19:56:25,151 INFO L226 Difference]: Without dead ends: 944 [2022-03-03 19:56:25,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:56:25,152 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:25,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 167 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 322 Unchecked, 0.1s Time] [2022-03-03 19:56:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-03-03 19:56:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 655. [2022-03-03 19:56:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.2370030581039755) internal successors, (1463), 654 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1463 transitions. [2022-03-03 19:56:25,168 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1463 transitions. Word has length 32 [2022-03-03 19:56:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:25,168 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1463 transitions. [2022-03-03 19:56:25,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1463 transitions. [2022-03-03 19:56:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:25,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:25,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:25,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:25,382 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 [2022-03-03 19:56:25,382 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:25,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:25,383 INFO L85 PathProgramCache]: Analyzing trace with hash -708561801, now seen corresponding path program 12 times [2022-03-03 19:56:25,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:25,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422335033] [2022-03-03 19:56:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:25,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:25,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:25,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422335033] [2022-03-03 19:56:25,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422335033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:25,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515102209] [2022-03-03 19:56:25,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:25,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:25,583 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) [2022-03-03 19:56:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:56:25,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:25,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:25,855 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 24 treesize of output 24 [2022-03-03 19:56:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:25,947 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 22 treesize of output 10 [2022-03-03 19:56:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:25,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:26,212 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:26,213 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 35 treesize of output 57 [2022-03-03 19:56:26,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:26,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515102209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:26,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:26,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-03 19:56:26,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048726922] [2022-03-03 19:56:26,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:26,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:26,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:26,332 INFO L87 Difference]: Start difference. First operand 655 states and 1463 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:26,501 INFO L93 Difference]: Finished difference Result 715 states and 1583 transitions. [2022-03-03 19:56:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:56:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:26,504 INFO L225 Difference]: With dead ends: 715 [2022-03-03 19:56:26,504 INFO L226 Difference]: Without dead ends: 707 [2022-03-03 19:56:26,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:56:26,504 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:26,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2022-03-03 19:56:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-03-03 19:56:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 682. [2022-03-03 19:56:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.2305433186490453) internal successors, (1519), 681 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1519 transitions. [2022-03-03 19:56:26,513 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1519 transitions. Word has length 32 [2022-03-03 19:56:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:26,514 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1519 transitions. [2022-03-03 19:56:26,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1519 transitions. [2022-03-03 19:56:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:26,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:26,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:26,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:26,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:56:26,731 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash 306961723, now seen corresponding path program 13 times [2022-03-03 19:56:26,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:26,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701253230] [2022-03-03 19:56:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:26,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:26,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701253230] [2022-03-03 19:56:26,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701253230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:26,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146010887] [2022-03-03 19:56:26,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:26,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:26,926 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) [2022-03-03 19:56:26,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:56:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:27,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:27,215 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 26 treesize of output 26 [2022-03-03 19:56:27,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:27,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:27,293 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 24 treesize of output 10 [2022-03-03 19:56:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:27,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:27,562 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:27,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-03 19:56:27,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:27,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146010887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:27,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:27,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-03-03 19:56:27,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244351562] [2022-03-03 19:56:27,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:27,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:56:27,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:56:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:56:27,677 INFO L87 Difference]: Start difference. First operand 682 states and 1519 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-03-03 19:56:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:28,333 INFO L93 Difference]: Finished difference Result 1476 states and 3239 transitions. [2022-03-03 19:56:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:56:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:28,337 INFO L225 Difference]: With dead ends: 1476 [2022-03-03 19:56:28,337 INFO L226 Difference]: Without dead ends: 1322 [2022-03-03 19:56:28,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:56:28,338 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 252 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:28,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 349 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 530 Invalid, 0 Unknown, 467 Unchecked, 0.2s Time] [2022-03-03 19:56:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-03-03 19:56:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 843. [2022-03-03 19:56:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.2422802850356294) internal successors, (1888), 842 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1888 transitions. [2022-03-03 19:56:28,351 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1888 transitions. Word has length 32 [2022-03-03 19:56:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:28,351 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1888 transitions. [2022-03-03 19:56:28,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-03-03 19:56:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1888 transitions. [2022-03-03 19:56:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:28,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:28,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:28,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:28,571 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 [2022-03-03 19:56:28,571 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1366997859, now seen corresponding path program 14 times [2022-03-03 19:56:28,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:28,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836588360] [2022-03-03 19:56:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:28,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:28,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836588360] [2022-03-03 19:56:28,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836588360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:28,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414476445] [2022-03-03 19:56:28,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:28,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:28,783 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) [2022-03-03 19:56:28,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:56:28,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:28,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:28,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:28,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:29,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:29,068 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 26 treesize of output 26 [2022-03-03 19:56:29,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:29,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:29,147 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 24 treesize of output 10 [2022-03-03 19:56:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:29,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:29,425 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:29,425 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 34 treesize of output 56 [2022-03-03 19:56:29,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:29,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414476445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:29,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:29,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-03-03 19:56:29,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7937241] [2022-03-03 19:56:29,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:29,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:56:29,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:56:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:56:29,522 INFO L87 Difference]: Start difference. First operand 843 states and 1888 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-03-03 19:56:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:30,159 INFO L93 Difference]: Finished difference Result 1446 states and 3193 transitions. [2022-03-03 19:56:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:56:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:30,163 INFO L225 Difference]: With dead ends: 1446 [2022-03-03 19:56:30,163 INFO L226 Difference]: Without dead ends: 1352 [2022-03-03 19:56:30,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2307, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:56:30,164 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:30,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 247 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 409 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2022-03-03 19:56:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-03-03 19:56:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1008. [2022-03-03 19:56:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.266137040714995) internal successors, (2282), 1007 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2282 transitions. [2022-03-03 19:56:30,179 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2282 transitions. Word has length 32 [2022-03-03 19:56:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:30,179 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2282 transitions. [2022-03-03 19:56:30,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-03-03 19:56:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2282 transitions. [2022-03-03 19:56:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:30,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:30,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:30,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:30,384 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 [2022-03-03 19:56:30,384 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2106792699, now seen corresponding path program 15 times [2022-03-03 19:56:30,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:30,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612042617] [2022-03-03 19:56:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:30,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:30,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612042617] [2022-03-03 19:56:30,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612042617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:30,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286478120] [2022-03-03 19:56:30,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:30,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:30,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:30,582 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) [2022-03-03 19:56:30,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:56:30,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:30,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:56:30,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:30,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:30,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-03 19:56:30,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:30,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:30,977 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 20 treesize of output 28 [2022-03-03 19:56:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:31,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:31,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:31,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:31,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:31,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:31,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-03 19:56:31,804 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 29 treesize of output 25 [2022-03-03 19:56:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:31,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286478120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:31,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:31,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2022-03-03 19:56:31,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200858521] [2022-03-03 19:56:31,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:31,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 19:56:31,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 19:56:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:56:31,929 INFO L87 Difference]: Start difference. First operand 1008 states and 2282 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:32,705 INFO L93 Difference]: Finished difference Result 1235 states and 2744 transitions. [2022-03-03 19:56:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:56:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:32,709 INFO L225 Difference]: With dead ends: 1235 [2022-03-03 19:56:32,709 INFO L226 Difference]: Without dead ends: 1214 [2022-03-03 19:56:32,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:56:32,710 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:32,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 215 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 311 Unchecked, 0.0s Time] [2022-03-03 19:56:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-03-03 19:56:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1080. [2022-03-03 19:56:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.2567191844300276) internal successors, (2435), 1079 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2435 transitions. [2022-03-03 19:56:32,728 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2435 transitions. Word has length 32 [2022-03-03 19:56:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:32,729 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 2435 transitions. [2022-03-03 19:56:32,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2435 transitions. [2022-03-03 19:56:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:32,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:32,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:32,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:32,946 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 [2022-03-03 19:56:32,947 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash 78448107, now seen corresponding path program 16 times [2022-03-03 19:56:32,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:32,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756279898] [2022-03-03 19:56:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:33,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:33,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756279898] [2022-03-03 19:56:33,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756279898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:33,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67978814] [2022-03-03 19:56:33,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:33,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:33,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:33,152 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) [2022-03-03 19:56:33,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:56:33,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:33,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:33,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-03 19:56:33,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:33,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:33,568 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 24 treesize of output 10 [2022-03-03 19:56:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:33,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:33,810 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:33,810 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 34 treesize of output 56 [2022-03-03 19:56:33,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:33,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67978814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:33,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:33,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-03 19:56:33,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98294157] [2022-03-03 19:56:33,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:33,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:33,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:33,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:33,961 INFO L87 Difference]: Start difference. First operand 1080 states and 2435 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:34,211 INFO L93 Difference]: Finished difference Result 1216 states and 2718 transitions. [2022-03-03 19:56:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:56:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 32 [2022-03-03 19:56:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:34,214 INFO L225 Difference]: With dead ends: 1216 [2022-03-03 19:56:34,214 INFO L226 Difference]: Without dead ends: 1204 [2022-03-03 19:56:34,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:56:34,215 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:34,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 125 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-03-03 19:56:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-03 19:56:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1083. [2022-03-03 19:56:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.253234750462107) internal successors, (2438), 1082 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2438 transitions. [2022-03-03 19:56:34,234 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2438 transitions. Word has length 32 [2022-03-03 19:56:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:34,234 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2438 transitions. [2022-03-03 19:56:34,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2438 transitions. [2022-03-03 19:56:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:34,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:34,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:34,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-03 19:56:34,436 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 [2022-03-03 19:56:34,436 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1563537433, now seen corresponding path program 17 times [2022-03-03 19:56:34,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:34,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43023849] [2022-03-03 19:56:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:34,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:34,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43023849] [2022-03-03 19:56:34,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43023849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:34,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660514153] [2022-03-03 19:56:34,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:34,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:34,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:34,637 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) [2022-03-03 19:56:34,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:56:34,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:34,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:34,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:34,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:34,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-03 19:56:35,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:35,018 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 22 treesize of output 10 [2022-03-03 19:56:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:35,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:35,254 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:35,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-03 19:56:35,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:35,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660514153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:35,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:35,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-03 19:56:35,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602435708] [2022-03-03 19:56:35,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:35,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:35,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:35,426 INFO L87 Difference]: Start difference. First operand 1083 states and 2438 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:35,624 INFO L93 Difference]: Finished difference Result 1155 states and 2591 transitions. [2022-03-03 19:56:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:56:35,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 32 [2022-03-03 19:56:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:35,628 INFO L225 Difference]: With dead ends: 1155 [2022-03-03 19:56:35,628 INFO L226 Difference]: Without dead ends: 1141 [2022-03-03 19:56:35,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:56:35,628 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:35,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-03-03 19:56:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-03-03 19:56:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1086. [2022-03-03 19:56:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.249769585253456) internal successors, (2441), 1085 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2441 transitions. [2022-03-03 19:56:35,643 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2441 transitions. Word has length 32 [2022-03-03 19:56:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:35,644 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2441 transitions. [2022-03-03 19:56:35,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2441 transitions. [2022-03-03 19:56:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:35,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:35,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:35,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:35,865 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 [2022-03-03 19:56:35,866 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -889796407, now seen corresponding path program 18 times [2022-03-03 19:56:35,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:35,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338142822] [2022-03-03 19:56:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:35,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:36,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:36,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338142822] [2022-03-03 19:56:36,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338142822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:36,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227430263] [2022-03-03 19:56:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:36,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:36,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:36,071 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) [2022-03-03 19:56:36,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:56:36,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:36,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:36,290 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 29 treesize of output 27 [2022-03-03 19:56:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:36,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:36,459 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 22 treesize of output 10 [2022-03-03 19:56:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:36,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:36,710 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:36,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-03 19:56:36,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:36,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227430263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:36,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:36,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-03 19:56:36,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430177816] [2022-03-03 19:56:36,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:36,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:36,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:36,829 INFO L87 Difference]: Start difference. First operand 1086 states and 2441 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:37,130 INFO L93 Difference]: Finished difference Result 1287 states and 2865 transitions. [2022-03-03 19:56:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:56:37,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:37,134 INFO L225 Difference]: With dead ends: 1287 [2022-03-03 19:56:37,134 INFO L226 Difference]: Without dead ends: 1267 [2022-03-03 19:56:37,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:56:37,135 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:37,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 140 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 241 Unchecked, 0.1s Time] [2022-03-03 19:56:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-03 19:56:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1147. [2022-03-03 19:56:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.244328097731239) internal successors, (2572), 1146 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2572 transitions. [2022-03-03 19:56:37,155 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2572 transitions. Word has length 32 [2022-03-03 19:56:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:37,155 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 2572 transitions. [2022-03-03 19:56:37,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2572 transitions. [2022-03-03 19:56:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:37,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:37,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:37,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:56:37,357 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 [2022-03-03 19:56:37,357 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1976105177, now seen corresponding path program 19 times [2022-03-03 19:56:37,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:37,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74612015] [2022-03-03 19:56:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:37,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:37,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74612015] [2022-03-03 19:56:37,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74612015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:37,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155776059] [2022-03-03 19:56:37,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:37,555 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) [2022-03-03 19:56:37,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:56:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:37,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:37,776 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 31 treesize of output 29 [2022-03-03 19:56:37,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:37,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:37,915 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 24 treesize of output 10 [2022-03-03 19:56:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:37,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:38,156 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:38,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-03 19:56:38,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:38,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155776059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:38,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:38,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-03 19:56:38,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288674573] [2022-03-03 19:56:38,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:38,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:38,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:38,273 INFO L87 Difference]: Start difference. First operand 1147 states and 2572 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:56:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:38,523 INFO L93 Difference]: Finished difference Result 1262 states and 2801 transitions. [2022-03-03 19:56:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:56:38,523 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 32 [2022-03-03 19:56:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:38,526 INFO L225 Difference]: With dead ends: 1262 [2022-03-03 19:56:38,526 INFO L226 Difference]: Without dead ends: 1236 [2022-03-03 19:56:38,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:56:38,527 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:38,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 163 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-03-03 19:56:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-03-03 19:56:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1157. [2022-03-03 19:56:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2422145328719725) internal successors, (2592), 1156 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2592 transitions. [2022-03-03 19:56:38,541 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2592 transitions. Word has length 32 [2022-03-03 19:56:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:38,541 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 2592 transitions. [2022-03-03 19:56:38,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:56:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2592 transitions. [2022-03-03 19:56:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:38,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:38,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:38,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:38,759 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 [2022-03-03 19:56:38,759 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -516998149, now seen corresponding path program 20 times [2022-03-03 19:56:38,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:38,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593310261] [2022-03-03 19:56:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:38,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:38,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593310261] [2022-03-03 19:56:38,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593310261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:38,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748489659] [2022-03-03 19:56:38,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:38,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:38,937 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) [2022-03-03 19:56:38,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:56:38,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:39,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:39,151 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 31 treesize of output 29 [2022-03-03 19:56:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:39,269 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 24 treesize of output 10 [2022-03-03 19:56:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:39,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:39,524 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:39,525 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 34 treesize of output 56 [2022-03-03 19:56:39,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:39,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748489659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:39,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:39,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-03 19:56:39,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71987998] [2022-03-03 19:56:39,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:39,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:39,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:39,665 INFO L87 Difference]: Start difference. First operand 1157 states and 2592 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:39,924 INFO L93 Difference]: Finished difference Result 1281 states and 2850 transitions. [2022-03-03 19:56:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:56:39,925 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:39,928 INFO L225 Difference]: With dead ends: 1281 [2022-03-03 19:56:39,928 INFO L226 Difference]: Without dead ends: 1260 [2022-03-03 19:56:39,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:56:39,929 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:39,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 307 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-03-03 19:56:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-03 19:56:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1165. [2022-03-03 19:56:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.2448453608247423) internal successors, (2613), 1164 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2613 transitions. [2022-03-03 19:56:39,944 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2613 transitions. Word has length 32 [2022-03-03 19:56:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:39,944 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2613 transitions. [2022-03-03 19:56:39,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2613 transitions. [2022-03-03 19:56:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:39,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:39,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:39,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:40,159 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 [2022-03-03 19:56:40,159 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 495694383, now seen corresponding path program 21 times [2022-03-03 19:56:40,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:40,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682806663] [2022-03-03 19:56:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:40,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682806663] [2022-03-03 19:56:40,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682806663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:40,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513413121] [2022-03-03 19:56:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:40,340 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) [2022-03-03 19:56:40,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:56:40,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:40,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:40,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:40,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:40,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-03 19:56:40,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:40,664 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 22 treesize of output 10 [2022-03-03 19:56:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:40,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:40,917 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:40,918 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 35 treesize of output 57 [2022-03-03 19:56:41,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:41,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513413121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:41,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:41,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-03-03 19:56:41,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479650959] [2022-03-03 19:56:41,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:41,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:41,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:41,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:41,060 INFO L87 Difference]: Start difference. First operand 1165 states and 2613 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:41,323 INFO L93 Difference]: Finished difference Result 1292 states and 2864 transitions. [2022-03-03 19:56:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:56:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:41,327 INFO L225 Difference]: With dead ends: 1292 [2022-03-03 19:56:41,327 INFO L226 Difference]: Without dead ends: 1268 [2022-03-03 19:56:41,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:56:41,328 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:41,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 158 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-03-03 19:56:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-03-03 19:56:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1176. [2022-03-03 19:56:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.244255319148936) internal successors, (2637), 1175 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2637 transitions. [2022-03-03 19:56:41,344 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2637 transitions. Word has length 32 [2022-03-03 19:56:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:41,344 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2637 transitions. [2022-03-03 19:56:41,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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) [2022-03-03 19:56:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2637 transitions. [2022-03-03 19:56:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:41,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:41,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:41,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:41,562 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 [2022-03-03 19:56:41,562 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash -956375147, now seen corresponding path program 22 times [2022-03-03 19:56:41,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:41,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979197398] [2022-03-03 19:56:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:41,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:41,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:41,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979197398] [2022-03-03 19:56:41,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979197398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:41,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96614176] [2022-03-03 19:56:41,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:41,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:41,765 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) [2022-03-03 19:56:41,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:56:41,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:41,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:41,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:41,978 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 31 treesize of output 29 [2022-03-03 19:56:42,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:42,089 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 24 treesize of output 10 [2022-03-03 19:56:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:42,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:42,370 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:42,371 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 34 treesize of output 56 [2022-03-03 19:56:42,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:42,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96614176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:42,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:42,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 31 [2022-03-03 19:56:42,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435379523] [2022-03-03 19:56:42,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:42,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:56:42,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:42,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:56:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:56:42,509 INFO L87 Difference]: Start difference. First operand 1176 states and 2637 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:42,830 INFO L93 Difference]: Finished difference Result 1465 states and 3217 transitions. [2022-03-03 19:56:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:56:42,831 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:42,846 INFO L225 Difference]: With dead ends: 1465 [2022-03-03 19:56:42,846 INFO L226 Difference]: Without dead ends: 1415 [2022-03-03 19:56:42,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:56:42,847 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:42,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 163 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 302 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-03-03 19:56:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-03-03 19:56:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1212. [2022-03-03 19:56:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.255986787778695) internal successors, (2732), 1211 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2732 transitions. [2022-03-03 19:56:42,864 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2732 transitions. Word has length 32 [2022-03-03 19:56:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:42,864 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2732 transitions. [2022-03-03 19:56:42,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2732 transitions. [2022-03-03 19:56:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:42,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:42,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:42,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:43,075 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 [2022-03-03 19:56:43,075 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1996610945, now seen corresponding path program 23 times [2022-03-03 19:56:43,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:43,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059522997] [2022-03-03 19:56:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:43,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:43,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:43,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059522997] [2022-03-03 19:56:43,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059522997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:43,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476383449] [2022-03-03 19:56:43,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:43,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:43,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:43,283 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) [2022-03-03 19:56:43,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:56:43,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:43,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:56:43,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:43,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:43,531 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 29 treesize of output 27 [2022-03-03 19:56:43,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:43,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:43,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:43,664 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 22 treesize of output 10 [2022-03-03 19:56:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:43,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:43,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:43,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:43,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:43,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-03 19:56:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:44,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476383449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:44,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:44,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 36 [2022-03-03 19:56:44,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022667111] [2022-03-03 19:56:44,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:44,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 19:56:44,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:44,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 19:56:44,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:56:44,141 INFO L87 Difference]: Start difference. First operand 1212 states and 2732 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:45,749 INFO L93 Difference]: Finished difference Result 2662 states and 5786 transitions. [2022-03-03 19:56:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:56:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:45,753 INFO L225 Difference]: With dead ends: 2662 [2022-03-03 19:56:45,753 INFO L226 Difference]: Without dead ends: 2469 [2022-03-03 19:56:45,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1014, Invalid=5628, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:56:45,754 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:45,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 379 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 922 Invalid, 0 Unknown, 416 Unchecked, 0.4s Time] [2022-03-03 19:56:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-03-03 19:56:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1440. [2022-03-03 19:56:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.244614315496873) internal successors, (3230), 1439 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3230 transitions. [2022-03-03 19:56:45,779 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3230 transitions. Word has length 32 [2022-03-03 19:56:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 3230 transitions. [2022-03-03 19:56:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3230 transitions. [2022-03-03 19:56:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:45,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:45,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:45,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:45,991 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 [2022-03-03 19:56:45,991 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1401532203, now seen corresponding path program 24 times [2022-03-03 19:56:45,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:45,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372370738] [2022-03-03 19:56:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:46,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:46,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372370738] [2022-03-03 19:56:46,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372370738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:46,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489832911] [2022-03-03 19:56:46,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:46,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:46,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:46,194 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) [2022-03-03 19:56:46,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:56:46,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:46,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:46,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:46,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:46,404 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 29 treesize of output 27 [2022-03-03 19:56:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:46,563 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 22 treesize of output 10 [2022-03-03 19:56:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:46,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:46,813 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:46,813 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 35 treesize of output 57 [2022-03-03 19:56:46,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:46,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489832911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:46,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:46,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-03 19:56:46,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124092505] [2022-03-03 19:56:46,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:46,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:46,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:46,967 INFO L87 Difference]: Start difference. First operand 1440 states and 3230 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:47,269 INFO L93 Difference]: Finished difference Result 1680 states and 3724 transitions. [2022-03-03 19:56:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:56:47,269 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 32 [2022-03-03 19:56:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:47,272 INFO L225 Difference]: With dead ends: 1680 [2022-03-03 19:56:47,272 INFO L226 Difference]: Without dead ends: 1666 [2022-03-03 19:56:47,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:56:47,272 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:47,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 202 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 250 Unchecked, 0.1s Time] [2022-03-03 19:56:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-03-03 19:56:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1487. [2022-03-03 19:56:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.2476446837146704) internal successors, (3340), 1486 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3340 transitions. [2022-03-03 19:56:47,290 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3340 transitions. Word has length 32 [2022-03-03 19:56:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:47,290 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 3340 transitions. [2022-03-03 19:56:47,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3340 transitions. [2022-03-03 19:56:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:47,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:47,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:47,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:47,507 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 [2022-03-03 19:56:47,507 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:47,508 INFO L85 PathProgramCache]: Analyzing trace with hash 809339119, now seen corresponding path program 25 times [2022-03-03 19:56:47,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:47,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606852117] [2022-03-03 19:56:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:47,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:47,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:47,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606852117] [2022-03-03 19:56:47,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606852117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:47,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591042513] [2022-03-03 19:56:47,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:47,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:47,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:47,696 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) [2022-03-03 19:56:47,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:56:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:47,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:47,927 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 31 treesize of output 29 [2022-03-03 19:56:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:48,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:48,074 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 24 treesize of output 10 [2022-03-03 19:56:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:48,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:48,308 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:48,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-03 19:56:48,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:48,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591042513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:48,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:48,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-03 19:56:48,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19107484] [2022-03-03 19:56:48,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:48,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:48,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:48,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:48,421 INFO L87 Difference]: Start difference. First operand 1487 states and 3340 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:48,705 INFO L93 Difference]: Finished difference Result 1626 states and 3621 transitions. [2022-03-03 19:56:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:56:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:48,708 INFO L225 Difference]: With dead ends: 1626 [2022-03-03 19:56:48,708 INFO L226 Difference]: Without dead ends: 1610 [2022-03-03 19:56:48,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:56:48,709 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:48,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 169 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-03-03 19:56:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-03-03 19:56:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1486. [2022-03-03 19:56:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 2.2471380471380473) internal successors, (3337), 1485 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3337 transitions. [2022-03-03 19:56:48,735 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3337 transitions. Word has length 32 [2022-03-03 19:56:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 3337 transitions. [2022-03-03 19:56:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3337 transitions. [2022-03-03 19:56:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:48,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:48,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:48,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:48,943 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 [2022-03-03 19:56:48,943 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:48,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1602633313, now seen corresponding path program 26 times [2022-03-03 19:56:48,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:48,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659183637] [2022-03-03 19:56:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:48,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:49,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:49,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659183637] [2022-03-03 19:56:49,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659183637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:49,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028200964] [2022-03-03 19:56:49,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:49,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:49,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:49,152 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) [2022-03-03 19:56:49,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:56:49,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:49,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:49,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:49,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:49,398 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 26 treesize of output 26 [2022-03-03 19:56:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:49,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:49,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:49,516 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 24 treesize of output 10 [2022-03-03 19:56:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:49,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:49,749 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:49,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-03 19:56:49,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:49,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028200964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:49,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:49,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-03-03 19:56:49,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378224906] [2022-03-03 19:56:49,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:49,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:49,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:49,852 INFO L87 Difference]: Start difference. First operand 1486 states and 3337 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:50,081 INFO L93 Difference]: Finished difference Result 1659 states and 3686 transitions. [2022-03-03 19:56:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:56:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 32 [2022-03-03 19:56:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:50,084 INFO L225 Difference]: With dead ends: 1659 [2022-03-03 19:56:50,084 INFO L226 Difference]: Without dead ends: 1645 [2022-03-03 19:56:50,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:56:50,084 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:50,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 160 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 198 Unchecked, 0.1s Time] [2022-03-03 19:56:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-03-03 19:56:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1494. [2022-03-03 19:56:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.245813797722706) internal successors, (3353), 1493 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3353 transitions. [2022-03-03 19:56:50,100 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3353 transitions. Word has length 32 [2022-03-03 19:56:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:50,100 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 3353 transitions. [2022-03-03 19:56:50,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3353 transitions. [2022-03-03 19:56:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:50,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:50,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:50,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:50,302 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 [2022-03-03 19:56:50,302 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash -117543987, now seen corresponding path program 27 times [2022-03-03 19:56:50,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:50,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430343362] [2022-03-03 19:56:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:50,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:50,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430343362] [2022-03-03 19:56:50,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430343362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:50,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685241596] [2022-03-03 19:56:50,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:50,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:50,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:50,480 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) [2022-03-03 19:56:50,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:56:50,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:50,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:56:50,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:50,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:50,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-03 19:56:50,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:50,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-03-03 19:56:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:50,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:52,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:52,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:52,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-03-03 19:56:52,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:52,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685241596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:52,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:52,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-03-03 19:56:52,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659994848] [2022-03-03 19:56:52,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:52,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:56:52,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:52,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:56:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:56:52,193 INFO L87 Difference]: Start difference. First operand 1494 states and 3353 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:52,584 INFO L93 Difference]: Finished difference Result 1596 states and 3554 transitions. [2022-03-03 19:56:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:56:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:52,587 INFO L225 Difference]: With dead ends: 1596 [2022-03-03 19:56:52,587 INFO L226 Difference]: Without dead ends: 1563 [2022-03-03 19:56:52,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:56:52,587 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:52,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 252 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 433 Unchecked, 0.1s Time] [2022-03-03 19:56:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-03-03 19:56:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1505. [2022-03-03 19:56:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.2513297872340425) internal successors, (3386), 1504 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3386 transitions. [2022-03-03 19:56:52,602 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3386 transitions. Word has length 32 [2022-03-03 19:56:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:52,603 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 3386 transitions. [2022-03-03 19:56:52,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3386 transitions. [2022-03-03 19:56:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:52,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:52,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:52,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-03 19:56:52,805 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 [2022-03-03 19:56:52,805 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1140541965, now seen corresponding path program 28 times [2022-03-03 19:56:52,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:52,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732646684] [2022-03-03 19:56:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:52,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:52,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:52,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732646684] [2022-03-03 19:56:52,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732646684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:52,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220682081] [2022-03-03 19:56:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:52,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:52,993 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) [2022-03-03 19:56:52,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:56:53,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:53,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:53,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:53,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:53,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:53,268 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 26 treesize of output 26 [2022-03-03 19:56:53,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:53,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:53,358 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 24 treesize of output 10 [2022-03-03 19:56:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:53,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:53,675 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:53,676 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 34 treesize of output 56 [2022-03-03 19:56:53,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:53,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220682081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:53,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:53,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-03 19:56:53,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103403177] [2022-03-03 19:56:53,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:53,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:53,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:53,816 INFO L87 Difference]: Start difference. First operand 1505 states and 3386 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:54,059 INFO L93 Difference]: Finished difference Result 1850 states and 4103 transitions. [2022-03-03 19:56:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:56:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 32 [2022-03-03 19:56:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:54,062 INFO L225 Difference]: With dead ends: 1850 [2022-03-03 19:56:54,062 INFO L226 Difference]: Without dead ends: 1756 [2022-03-03 19:56:54,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:56:54,063 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:54,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 264 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 234 Invalid, 0 Unknown, 372 Unchecked, 0.1s Time] [2022-03-03 19:56:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-03-03 19:56:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1578. [2022-03-03 19:56:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.25428027901078) internal successors, (3555), 1577 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 3555 transitions. [2022-03-03 19:56:54,080 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 3555 transitions. Word has length 32 [2022-03-03 19:56:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:54,080 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 3555 transitions. [2022-03-03 19:56:54,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2022-03-03 19:56:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 3555 transitions. [2022-03-03 19:56:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:54,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:54,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:54,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:54,283 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 [2022-03-03 19:56:54,283 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 968255547, now seen corresponding path program 29 times [2022-03-03 19:56:54,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:54,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605820785] [2022-03-03 19:56:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:54,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:54,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:54,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605820785] [2022-03-03 19:56:54,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605820785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:54,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920990542] [2022-03-03 19:56:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:54,483 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) [2022-03-03 19:56:54,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:56:54,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:56:54,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:56:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:54,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:54,756 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 24 treesize of output 24 [2022-03-03 19:56:54,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:54,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:54,807 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 22 treesize of output 10 [2022-03-03 19:56:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:54,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:55,071 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:55,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-03 19:56:55,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:55,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920990542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:55,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:55,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-03 19:56:55,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577369459] [2022-03-03 19:56:55,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:55,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:55,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:55,196 INFO L87 Difference]: Start difference. First operand 1578 states and 3555 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:55,445 INFO L93 Difference]: Finished difference Result 2252 states and 4991 transitions. [2022-03-03 19:56:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:56:55,446 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:55,449 INFO L225 Difference]: With dead ends: 2252 [2022-03-03 19:56:55,449 INFO L226 Difference]: Without dead ends: 2140 [2022-03-03 19:56:55,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:56:55,449 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:55,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 240 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 243 Invalid, 0 Unknown, 575 Unchecked, 0.1s Time] [2022-03-03 19:56:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-03-03 19:56:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1707. [2022-03-03 19:56:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1706 states have (on average 2.2626025791324738) internal successors, (3860), 1706 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 3860 transitions. [2022-03-03 19:56:55,470 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 3860 transitions. Word has length 32 [2022-03-03 19:56:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:55,470 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 3860 transitions. [2022-03-03 19:56:55,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 3860 transitions. [2022-03-03 19:56:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:55,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:55,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:55,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:55,683 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 [2022-03-03 19:56:55,683 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:55,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1980948079, now seen corresponding path program 30 times [2022-03-03 19:56:55,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:55,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72037484] [2022-03-03 19:56:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:55,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:55,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:55,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72037484] [2022-03-03 19:56:55,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72037484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:55,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965557434] [2022-03-03 19:56:55,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:55,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:55,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:55,860 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) [2022-03-03 19:56:55,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:56:55,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:55,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:56:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:56,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:56,142 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 24 treesize of output 24 [2022-03-03 19:56:56,173 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:56:56,174 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 22 treesize of output 10 [2022-03-03 19:56:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:56,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:56,451 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:56,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-03 19:56:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:56,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965557434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:56,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:56,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-03-03 19:56:56,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465667869] [2022-03-03 19:56:56,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:56,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:56:56,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:56:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:56:56,591 INFO L87 Difference]: Start difference. First operand 1707 states and 3860 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:57,204 INFO L93 Difference]: Finished difference Result 2522 states and 5549 transitions. [2022-03-03 19:56:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:56:57,205 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:57,208 INFO L225 Difference]: With dead ends: 2522 [2022-03-03 19:56:57,209 INFO L226 Difference]: Without dead ends: 2400 [2022-03-03 19:56:57,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:56:57,209 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 248 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:57,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 203 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 471 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2022-03-03 19:56:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-03-03 19:56:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1538. [2022-03-03 19:56:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.2485361093038385) internal successors, (3456), 1537 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3456 transitions. [2022-03-03 19:56:57,229 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3456 transitions. Word has length 32 [2022-03-03 19:56:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:57,230 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 3456 transitions. [2022-03-03 19:56:57,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3456 transitions. [2022-03-03 19:56:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:57,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:57,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:57,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:57,447 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 [2022-03-03 19:56:57,447 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1077914535, now seen corresponding path program 31 times [2022-03-03 19:56:57,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:57,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955872478] [2022-03-03 19:56:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:57,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:57,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955872478] [2022-03-03 19:56:57,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955872478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:57,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711079660] [2022-03-03 19:56:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:57,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:57,649 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) [2022-03-03 19:56:57,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:56:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:57,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:57,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:57,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:57,901 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 26 treesize of output 26 [2022-03-03 19:56:58,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:58,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:58,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:58,020 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 24 treesize of output 10 [2022-03-03 19:56:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:58,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:58,295 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:56:58,295 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 34 treesize of output 56 [2022-03-03 19:56:58,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:56:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:58,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711079660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:58,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:58,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:56:58,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635763573] [2022-03-03 19:56:58,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:58,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:56:58,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:58,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:56:58,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:56:58,499 INFO L87 Difference]: Start difference. First operand 1538 states and 3456 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:59,416 INFO L93 Difference]: Finished difference Result 2813 states and 6181 transitions. [2022-03-03 19:56:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:56:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:56:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:59,420 INFO L225 Difference]: With dead ends: 2813 [2022-03-03 19:56:59,420 INFO L226 Difference]: Without dead ends: 2550 [2022-03-03 19:56:59,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:56:59,421 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 288 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:59,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 439 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 629 Invalid, 0 Unknown, 1159 Unchecked, 0.2s Time] [2022-03-03 19:56:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2022-03-03 19:56:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1860. [2022-03-03 19:56:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 2.2501344809037116) internal successors, (4183), 1859 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 4183 transitions. [2022-03-03 19:56:59,468 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 4183 transitions. Word has length 32 [2022-03-03 19:56:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:59,468 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 4183 transitions. [2022-03-03 19:56:59,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 4183 transitions. [2022-03-03 19:56:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:56:59,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:59,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:59,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:59,683 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 [2022-03-03 19:56:59,683 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash 282445069, now seen corresponding path program 32 times [2022-03-03 19:56:59,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:59,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097586335] [2022-03-03 19:56:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:59,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:59,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097586335] [2022-03-03 19:56:59,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097586335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:59,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767341391] [2022-03-03 19:56:59,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:59,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:59,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:59,859 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) [2022-03-03 19:56:59,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:56:59,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:56:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:00,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:00,127 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 26 treesize of output 26 [2022-03-03 19:57:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:00,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:00,244 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 24 treesize of output 10 [2022-03-03 19:57:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:00,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:00,489 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:00,489 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 34 treesize of output 56 [2022-03-03 19:57:00,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:00,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767341391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:00,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:00,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-03 19:57:00,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269395090] [2022-03-03 19:57:00,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:00,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:00,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:00,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:00,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:00,686 INFO L87 Difference]: Start difference. First operand 1860 states and 4183 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:57:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:01,161 INFO L93 Difference]: Finished difference Result 2130 states and 4721 transitions. [2022-03-03 19:57:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:57:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 32 [2022-03-03 19:57:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:01,164 INFO L225 Difference]: With dead ends: 2130 [2022-03-03 19:57:01,164 INFO L226 Difference]: Without dead ends: 2102 [2022-03-03 19:57:01,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:57:01,165 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:01,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 317 Invalid, 0 Unknown, 388 Unchecked, 0.1s Time] [2022-03-03 19:57:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-03-03 19:57:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1894. [2022-03-03 19:57:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.2519809825673534) internal successors, (4263), 1893 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 4263 transitions. [2022-03-03 19:57:01,188 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 4263 transitions. Word has length 32 [2022-03-03 19:57:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:01,188 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 4263 transitions. [2022-03-03 19:57:01,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:57:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 4263 transitions. [2022-03-03 19:57:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:01,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:01,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:01,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-03 19:57:01,407 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 [2022-03-03 19:57:01,407 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 458576657, now seen corresponding path program 33 times [2022-03-03 19:57:01,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:01,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882374695] [2022-03-03 19:57:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:01,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:01,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:01,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882374695] [2022-03-03 19:57:01,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882374695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:01,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965525069] [2022-03-03 19:57:01,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:01,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:01,607 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) [2022-03-03 19:57:01,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:57:01,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:57:01,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:01,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:01,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:01,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-03 19:57:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:01,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:01,986 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 24 treesize of output 10 [2022-03-03 19:57:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:02,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:02,247 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:02,247 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 34 treesize of output 56 [2022-03-03 19:57:02,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:02,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965525069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:02,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:02,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-03 19:57:02,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599049050] [2022-03-03 19:57:02,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:02,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:02,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:02,394 INFO L87 Difference]: Start difference. First operand 1894 states and 4263 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:03,118 INFO L93 Difference]: Finished difference Result 2381 states and 5316 transitions. [2022-03-03 19:57:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:57:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:03,121 INFO L225 Difference]: With dead ends: 2381 [2022-03-03 19:57:03,121 INFO L226 Difference]: Without dead ends: 2304 [2022-03-03 19:57:03,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:57:03,122 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 160 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:03,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 268 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 409 Invalid, 0 Unknown, 444 Unchecked, 0.2s Time] [2022-03-03 19:57:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-03-03 19:57:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2022. [2022-03-03 19:57:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.256308758040574) internal successors, (4560), 2021 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 4560 transitions. [2022-03-03 19:57:03,150 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 4560 transitions. Word has length 32 [2022-03-03 19:57:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:03,150 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 4560 transitions. [2022-03-03 19:57:03,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 4560 transitions. [2022-03-03 19:57:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:03,153 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:03,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:03,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:57:03,354 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 [2022-03-03 19:57:03,354 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash -362600081, now seen corresponding path program 34 times [2022-03-03 19:57:03,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:03,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797373105] [2022-03-03 19:57:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:03,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:03,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:03,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797373105] [2022-03-03 19:57:03,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797373105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:03,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431316312] [2022-03-03 19:57:03,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:57:03,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:03,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:03,536 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) [2022-03-03 19:57:03,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:57:03,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:57:03,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:03,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:03,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-03 19:57:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:03,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:03,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-03 19:57:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:03,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:04,131 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:04,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-03 19:57:04,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:04,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431316312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:04,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:04,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-03 19:57:04,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625510358] [2022-03-03 19:57:04,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:04,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:04,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:04,287 INFO L87 Difference]: Start difference. First operand 2022 states and 4560 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:04,664 INFO L93 Difference]: Finished difference Result 2174 states and 4888 transitions. [2022-03-03 19:57:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:57:04,665 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:04,667 INFO L225 Difference]: With dead ends: 2174 [2022-03-03 19:57:04,667 INFO L226 Difference]: Without dead ends: 2154 [2022-03-03 19:57:04,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:57:04,667 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:04,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 231 Invalid, 0 Unknown, 326 Unchecked, 0.1s Time] [2022-03-03 19:57:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-03-03 19:57:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2043. [2022-03-03 19:57:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 2.254162585700294) internal successors, (4603), 2042 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 4603 transitions. [2022-03-03 19:57:04,688 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 4603 transitions. Word has length 32 [2022-03-03 19:57:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:04,688 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 4603 transitions. [2022-03-03 19:57:04,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 4603 transitions. [2022-03-03 19:57:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:04,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:04,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:04,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:04,906 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 [2022-03-03 19:57:04,906 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1350073971, now seen corresponding path program 35 times [2022-03-03 19:57:04,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:04,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931908328] [2022-03-03 19:57:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:04,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:05,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:05,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931908328] [2022-03-03 19:57:05,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931908328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:05,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900068453] [2022-03-03 19:57:05,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:57:05,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:05,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:05,100 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) [2022-03-03 19:57:05,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:57:05,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:57:05,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:05,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:57:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:05,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:05,368 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 29 treesize of output 27 [2022-03-03 19:57:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:05,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,549 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 22 treesize of output 10 [2022-03-03 19:57:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:05,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:05,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:05,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-03 19:57:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:06,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900068453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:06,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:06,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-03-03 19:57:06,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717708423] [2022-03-03 19:57:06,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:06,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 19:57:06,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 19:57:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:57:06,034 INFO L87 Difference]: Start difference. First operand 2043 states and 4603 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:06,969 INFO L93 Difference]: Finished difference Result 2682 states and 5975 transitions. [2022-03-03 19:57:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:57:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:06,972 INFO L225 Difference]: With dead ends: 2682 [2022-03-03 19:57:06,972 INFO L226 Difference]: Without dead ends: 2649 [2022-03-03 19:57:06,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=650, Invalid=3132, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:57:06,973 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 223 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:06,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 216 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 536 Invalid, 0 Unknown, 521 Unchecked, 0.2s Time] [2022-03-03 19:57:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-03-03 19:57:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2201. [2022-03-03 19:57:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.255) internal successors, (4961), 2200 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 4961 transitions. [2022-03-03 19:57:06,999 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 4961 transitions. Word has length 32 [2022-03-03 19:57:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 4961 transitions. [2022-03-03 19:57:07,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 4961 transitions. [2022-03-03 19:57:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:07,002 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:07,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:07,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:57:07,215 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 [2022-03-03 19:57:07,215 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1516422259, now seen corresponding path program 36 times [2022-03-03 19:57:07,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:07,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293709157] [2022-03-03 19:57:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:07,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:07,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293709157] [2022-03-03 19:57:07,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293709157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:07,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366715973] [2022-03-03 19:57:07,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:07,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:07,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:07,397 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) [2022-03-03 19:57:07,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:57:07,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:57:07,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:07,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:57:07,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:07,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:07,612 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 29 treesize of output 27 [2022-03-03 19:57:07,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:07,766 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 22 treesize of output 10 [2022-03-03 19:57:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:07,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:08,051 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:08,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-03 19:57:08,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:08,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366715973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:08,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:08,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:57:08,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618551414] [2022-03-03 19:57:08,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:08,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:08,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:08,187 INFO L87 Difference]: Start difference. First operand 2201 states and 4961 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:08,640 INFO L93 Difference]: Finished difference Result 2948 states and 6539 transitions. [2022-03-03 19:57:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:57:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:08,643 INFO L225 Difference]: With dead ends: 2948 [2022-03-03 19:57:08,643 INFO L226 Difference]: Without dead ends: 2823 [2022-03-03 19:57:08,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:57:08,644 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:08,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 316 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 423 Invalid, 0 Unknown, 725 Unchecked, 0.2s Time] [2022-03-03 19:57:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-03-03 19:57:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2454. [2022-03-03 19:57:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 2.2592743579290664) internal successors, (5542), 2453 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 5542 transitions. [2022-03-03 19:57:08,673 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 5542 transitions. Word has length 32 [2022-03-03 19:57:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:08,673 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 5542 transitions. [2022-03-03 19:57:08,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 5542 transitions. [2022-03-03 19:57:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:08,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:08,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:08,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:08,892 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 [2022-03-03 19:57:08,892 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:08,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1972305753, now seen corresponding path program 37 times [2022-03-03 19:57:08,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:08,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621469237] [2022-03-03 19:57:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:08,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:09,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:09,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621469237] [2022-03-03 19:57:09,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621469237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:09,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889353824] [2022-03-03 19:57:09,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:57:09,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:09,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:09,101 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) [2022-03-03 19:57:09,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:57:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:09,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:09,334 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 31 treesize of output 29 [2022-03-03 19:57:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:09,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:09,489 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 24 treesize of output 10 [2022-03-03 19:57:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:09,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:09,746 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:09,746 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 34 treesize of output 56 [2022-03-03 19:57:09,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:09,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889353824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:09,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:09,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-03 19:57:09,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18102903] [2022-03-03 19:57:09,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:09,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:09,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:09,888 INFO L87 Difference]: Start difference. First operand 2454 states and 5542 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:10,267 INFO L93 Difference]: Finished difference Result 4067 states and 9106 transitions. [2022-03-03 19:57:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:57:10,268 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:10,272 INFO L225 Difference]: With dead ends: 4067 [2022-03-03 19:57:10,273 INFO L226 Difference]: Without dead ends: 4040 [2022-03-03 19:57:10,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:57:10,273 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 115 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:10,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 305 Invalid, 0 Unknown, 385 Unchecked, 0.1s Time] [2022-03-03 19:57:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-03-03 19:57:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 2635. [2022-03-03 19:57:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.2649962034927866) internal successors, (5966), 2634 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 5966 transitions. [2022-03-03 19:57:10,321 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 5966 transitions. Word has length 32 [2022-03-03 19:57:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:10,321 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 5966 transitions. [2022-03-03 19:57:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 5966 transitions. [2022-03-03 19:57:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:10,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:10,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:10,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:10,534 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 [2022-03-03 19:57:10,534 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 804520611, now seen corresponding path program 38 times [2022-03-03 19:57:10,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:10,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919094741] [2022-03-03 19:57:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:10,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:10,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919094741] [2022-03-03 19:57:10,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919094741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:10,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240653744] [2022-03-03 19:57:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:10,724 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) [2022-03-03 19:57:10,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:57:10,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:10,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:10,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:57:10,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:10,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:10,953 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 29 treesize of output 27 [2022-03-03 19:57:11,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:11,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:11,091 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 22 treesize of output 10 [2022-03-03 19:57:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:11,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:11,347 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:11,347 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 35 treesize of output 57 [2022-03-03 19:57:11,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:11,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240653744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:11,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:11,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-03 19:57:11,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391324439] [2022-03-03 19:57:11,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:11,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:11,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:11,497 INFO L87 Difference]: Start difference. First operand 2635 states and 5966 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:11,884 INFO L93 Difference]: Finished difference Result 3211 states and 7172 transitions. [2022-03-03 19:57:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:57:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:11,888 INFO L225 Difference]: With dead ends: 3211 [2022-03-03 19:57:11,888 INFO L226 Difference]: Without dead ends: 3145 [2022-03-03 19:57:11,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:57:11,889 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 132 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 617 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:11,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 241 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 341 Invalid, 0 Unknown, 617 Unchecked, 0.1s Time] [2022-03-03 19:57:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-03-03 19:57:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2696. [2022-03-03 19:57:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.2608534322820035) internal successors, (6093), 2695 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6093 transitions. [2022-03-03 19:57:11,917 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6093 transitions. Word has length 32 [2022-03-03 19:57:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:11,917 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 6093 transitions. [2022-03-03 19:57:11,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6093 transitions. [2022-03-03 19:57:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:11,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:11,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:11,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 19:57:12,122 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 [2022-03-03 19:57:12,122 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash 349061555, now seen corresponding path program 39 times [2022-03-03 19:57:12,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:12,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595843748] [2022-03-03 19:57:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:12,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:12,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595843748] [2022-03-03 19:57:12,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595843748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:12,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893023264] [2022-03-03 19:57:12,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:12,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:12,335 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) [2022-03-03 19:57:12,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:57:12,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:57:12,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:12,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:57:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:12,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:12,620 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 29 treesize of output 27 [2022-03-03 19:57:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:12,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:12,806 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 20 treesize of output 28 [2022-03-03 19:57:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:12,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:13,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:13,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:13,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:13,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2022-03-03 19:57:13,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:13,703 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 47 treesize of output 45 [2022-03-03 19:57:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:13,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893023264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:13,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:13,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-03-03 19:57:13,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179133723] [2022-03-03 19:57:13,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:13,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:57:13,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:57:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:57:13,856 INFO L87 Difference]: Start difference. First operand 2696 states and 6093 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:15,629 INFO L93 Difference]: Finished difference Result 3668 states and 8214 transitions. [2022-03-03 19:57:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:57:15,629 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:15,635 INFO L225 Difference]: With dead ends: 3668 [2022-03-03 19:57:15,636 INFO L226 Difference]: Without dead ends: 3548 [2022-03-03 19:57:15,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1004, Invalid=5002, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:57:15,636 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:15,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 603 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 313 Invalid, 0 Unknown, 1145 Unchecked, 0.1s Time] [2022-03-03 19:57:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-03-03 19:57:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 2929. [2022-03-03 19:57:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 2.2575136612021858) internal successors, (6610), 2928 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 6610 transitions. [2022-03-03 19:57:15,682 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 6610 transitions. Word has length 32 [2022-03-03 19:57:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:15,682 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 6610 transitions. [2022-03-03 19:57:15,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 6610 transitions. [2022-03-03 19:57:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:15,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:15,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:15,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:57:15,902 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 [2022-03-03 19:57:15,902 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2145543437, now seen corresponding path program 40 times [2022-03-03 19:57:15,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:15,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578908836] [2022-03-03 19:57:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:15,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:16,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:16,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578908836] [2022-03-03 19:57:16,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578908836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756082949] [2022-03-03 19:57:16,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:57:16,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:16,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:16,092 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) [2022-03-03 19:57:16,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:57:16,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:57:16,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:16,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:16,308 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 31 treesize of output 29 [2022-03-03 19:57:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:16,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:16,469 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 24 treesize of output 10 [2022-03-03 19:57:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:16,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:16,728 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:16,729 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 34 treesize of output 56 [2022-03-03 19:57:16,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:16,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756082949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:16,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:16,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-03 19:57:16,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156243596] [2022-03-03 19:57:16,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:16,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:16,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:16,921 INFO L87 Difference]: Start difference. First operand 2929 states and 6610 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:57:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:17,492 INFO L93 Difference]: Finished difference Result 4509 states and 10100 transitions. [2022-03-03 19:57:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:57:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 32 [2022-03-03 19:57:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:17,498 INFO L225 Difference]: With dead ends: 4509 [2022-03-03 19:57:17,498 INFO L226 Difference]: Without dead ends: 4467 [2022-03-03 19:57:17,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:57:17,499 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:17,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 296 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 406 Invalid, 0 Unknown, 514 Unchecked, 0.2s Time] [2022-03-03 19:57:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-03-03 19:57:17,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3295. [2022-03-03 19:57:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.2726168791742563) internal successors, (7486), 3294 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 7486 transitions. [2022-03-03 19:57:17,549 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 7486 transitions. Word has length 32 [2022-03-03 19:57:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:17,549 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 7486 transitions. [2022-03-03 19:57:17,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:57:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 7486 transitions. [2022-03-03 19:57:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:17,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:17,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:17,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:17,767 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 [2022-03-03 19:57:17,767 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1639171119, now seen corresponding path program 41 times [2022-03-03 19:57:17,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:17,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605903507] [2022-03-03 19:57:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:17,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:17,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605903507] [2022-03-03 19:57:17,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605903507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:17,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619560134] [2022-03-03 19:57:17,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:57:17,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:17,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:17,946 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) [2022-03-03 19:57:17,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:57:17,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:57:17,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:57:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:18,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:18,194 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 29 treesize of output 27 [2022-03-03 19:57:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:18,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:18,348 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 22 treesize of output 10 [2022-03-03 19:57:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:18,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:18,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:18,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:18,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:18,596 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 33 treesize of output 57 [2022-03-03 19:57:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:18,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619560134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:18,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:18,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-03-03 19:57:18,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082932808] [2022-03-03 19:57:18,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:18,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:57:18,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:57:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:57:18,946 INFO L87 Difference]: Start difference. First operand 3295 states and 7486 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:20,165 INFO L93 Difference]: Finished difference Result 5882 states and 13176 transitions. [2022-03-03 19:57:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:57:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:20,173 INFO L225 Difference]: With dead ends: 5882 [2022-03-03 19:57:20,174 INFO L226 Difference]: Without dead ends: 5674 [2022-03-03 19:57:20,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=867, Invalid=4389, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:57:20,174 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:20,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 390 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 719 Invalid, 0 Unknown, 517 Unchecked, 0.3s Time] [2022-03-03 19:57:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2022-03-03 19:57:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 3749. [2022-03-03 19:57:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 2.2716115261472787) internal successors, (8514), 3748 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 8514 transitions. [2022-03-03 19:57:20,242 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 8514 transitions. Word has length 32 [2022-03-03 19:57:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:20,242 INFO L470 AbstractCegarLoop]: Abstraction has 3749 states and 8514 transitions. [2022-03-03 19:57:20,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 8514 transitions. [2022-03-03 19:57:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:20,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:20,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:20,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:20,447 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 [2022-03-03 19:57:20,447 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash 251124075, now seen corresponding path program 42 times [2022-03-03 19:57:20,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:20,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910162614] [2022-03-03 19:57:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:20,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:20,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:20,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910162614] [2022-03-03 19:57:20,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910162614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:20,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039081503] [2022-03-03 19:57:20,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:20,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:20,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:20,659 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) [2022-03-03 19:57:20,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:57:20,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:57:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:57:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:20,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:20,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-03 19:57:21,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:21,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:21,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:21,078 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 22 treesize of output 10 [2022-03-03 19:57:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:21,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:21,325 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:21,325 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 35 treesize of output 57 [2022-03-03 19:57:21,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:21,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039081503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:21,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:21,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 28 [2022-03-03 19:57:21,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005434760] [2022-03-03 19:57:21,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:21,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:57:21,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:57:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:57:21,479 INFO L87 Difference]: Start difference. First operand 3749 states and 8514 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:21,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:21,671 INFO L93 Difference]: Finished difference Result 4320 states and 9774 transitions. [2022-03-03 19:57:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:57:21,672 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:21,677 INFO L225 Difference]: With dead ends: 4320 [2022-03-03 19:57:21,677 INFO L226 Difference]: Without dead ends: 4280 [2022-03-03 19:57:21,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:57:21,677 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:21,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 197 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2022-03-03 19:57:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2022-03-03 19:57:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3804. [2022-03-03 19:57:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 2.2713647120694187) internal successors, (8638), 3803 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 8638 transitions. [2022-03-03 19:57:21,720 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 8638 transitions. Word has length 32 [2022-03-03 19:57:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:21,720 INFO L470 AbstractCegarLoop]: Abstraction has 3804 states and 8638 transitions. [2022-03-03 19:57:21,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 8638 transitions. [2022-03-03 19:57:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:21,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:21,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:21,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-03 19:57:21,925 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 [2022-03-03 19:57:21,925 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:21,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1453373471, now seen corresponding path program 43 times [2022-03-03 19:57:21,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:21,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618102775] [2022-03-03 19:57:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:21,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:22,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:22,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618102775] [2022-03-03 19:57:22,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618102775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:22,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651852845] [2022-03-03 19:57:22,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:57:22,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:22,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:22,100 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) [2022-03-03 19:57:22,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:57:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:22,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:22,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:22,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:22,353 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 26 treesize of output 26 [2022-03-03 19:57:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:22,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:22,467 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 24 treesize of output 10 [2022-03-03 19:57:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:22,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:22,728 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:22,729 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 34 treesize of output 56 [2022-03-03 19:57:22,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:22,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651852845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:22,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:22,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-03-03 19:57:22,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220659435] [2022-03-03 19:57:22,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:22,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:22,928 INFO L87 Difference]: Start difference. First operand 3804 states and 8638 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:57:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:23,301 INFO L93 Difference]: Finished difference Result 4154 states and 9383 transitions. [2022-03-03 19:57:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:57:23,302 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 32 [2022-03-03 19:57:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:23,307 INFO L225 Difference]: With dead ends: 4154 [2022-03-03 19:57:23,307 INFO L226 Difference]: Without dead ends: 4143 [2022-03-03 19:57:23,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:57:23,307 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:23,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 182 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 228 Invalid, 0 Unknown, 314 Unchecked, 0.1s Time] [2022-03-03 19:57:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-03-03 19:57:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3797. [2022-03-03 19:57:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 2.2710748155953637) internal successors, (8621), 3796 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 8621 transitions. [2022-03-03 19:57:23,350 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 8621 transitions. Word has length 32 [2022-03-03 19:57:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:23,351 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 8621 transitions. [2022-03-03 19:57:23,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-03 19:57:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 8621 transitions. [2022-03-03 19:57:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:23,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:23,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:23,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:23,555 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 [2022-03-03 19:57:23,556 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash -62131981, now seen corresponding path program 44 times [2022-03-03 19:57:23,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:23,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008611250] [2022-03-03 19:57:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:23,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:23,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008611250] [2022-03-03 19:57:23,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008611250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:23,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164589568] [2022-03-03 19:57:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:23,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:23,745 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) [2022-03-03 19:57:23,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:57:23,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:24,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:24,021 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 26 treesize of output 26 [2022-03-03 19:57:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:24,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:24,136 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 24 treesize of output 10 [2022-03-03 19:57:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:24,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:24,391 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:24,391 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 34 treesize of output 56 [2022-03-03 19:57:24,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:24,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164589568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:24,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:24,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:57:24,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34800172] [2022-03-03 19:57:24,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:24,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:24,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:24,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:24,585 INFO L87 Difference]: Start difference. First operand 3797 states and 8621 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:25,291 INFO L93 Difference]: Finished difference Result 4560 states and 10241 transitions. [2022-03-03 19:57:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:57:25,291 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:25,296 INFO L225 Difference]: With dead ends: 4560 [2022-03-03 19:57:25,297 INFO L226 Difference]: Without dead ends: 4520 [2022-03-03 19:57:25,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:57:25,297 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 162 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:25,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 263 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 300 Invalid, 0 Unknown, 545 Unchecked, 0.1s Time] [2022-03-03 19:57:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-03-03 19:57:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3870. [2022-03-03 19:57:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.271387955544068) internal successors, (8788), 3869 states have internal predecessors, (8788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 8788 transitions. [2022-03-03 19:57:25,359 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 8788 transitions. Word has length 32 [2022-03-03 19:57:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:25,359 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 8788 transitions. [2022-03-03 19:57:25,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 8788 transitions. [2022-03-03 19:57:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:25,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:25,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:25,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:25,565 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 [2022-03-03 19:57:25,565 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1842733581, now seen corresponding path program 45 times [2022-03-03 19:57:25,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:25,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102589969] [2022-03-03 19:57:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:25,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:25,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102589969] [2022-03-03 19:57:25,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102589969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:25,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552912320] [2022-03-03 19:57:25,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:25,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:25,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:25,765 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) [2022-03-03 19:57:25,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:57:25,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:57:25,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:25,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:26,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:26,006 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 26 treesize of output 26 [2022-03-03 19:57:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:26,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:26,085 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 24 treesize of output 10 [2022-03-03 19:57:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:26,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:26,333 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:26,334 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 34 treesize of output 56 [2022-03-03 19:57:26,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:26,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552912320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:26,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:26,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:57:26,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32452788] [2022-03-03 19:57:26,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:26,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:26,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:26,565 INFO L87 Difference]: Start difference. First operand 3870 states and 8788 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:27,096 INFO L93 Difference]: Finished difference Result 5581 states and 12529 transitions. [2022-03-03 19:57:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:57:27,096 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:27,104 INFO L225 Difference]: With dead ends: 5581 [2022-03-03 19:57:27,104 INFO L226 Difference]: Without dead ends: 5455 [2022-03-03 19:57:27,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:57:27,104 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:27,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 286 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 402 Invalid, 0 Unknown, 446 Unchecked, 0.2s Time] [2022-03-03 19:57:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2022-03-03 19:57:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 3920. [2022-03-03 19:57:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 2.2702219954069918) internal successors, (8897), 3919 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 8897 transitions. [2022-03-03 19:57:27,164 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 8897 transitions. Word has length 32 [2022-03-03 19:57:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:27,164 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 8897 transitions. [2022-03-03 19:57:27,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 8897 transitions. [2022-03-03 19:57:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:27,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:27,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:27,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:57:27,369 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 [2022-03-03 19:57:27,369 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash 778274133, now seen corresponding path program 46 times [2022-03-03 19:57:27,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:27,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895770567] [2022-03-03 19:57:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:27,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:27,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:27,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895770567] [2022-03-03 19:57:27,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895770567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:27,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484473956] [2022-03-03 19:57:27,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:57:27,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:27,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:27,565 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) [2022-03-03 19:57:27,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:57:27,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:57:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:27,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:27,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:27,832 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 26 treesize of output 26 [2022-03-03 19:57:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:27,910 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 24 treesize of output 10 [2022-03-03 19:57:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:27,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:28,169 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:28,169 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 34 treesize of output 56 [2022-03-03 19:57:28,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:28,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484473956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:28,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:28,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:57:28,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35048860] [2022-03-03 19:57:28,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:28,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:28,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:28,384 INFO L87 Difference]: Start difference. First operand 3920 states and 8897 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:29,059 INFO L93 Difference]: Finished difference Result 5422 states and 12182 transitions. [2022-03-03 19:57:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:57:29,060 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:29,066 INFO L225 Difference]: With dead ends: 5422 [2022-03-03 19:57:29,066 INFO L226 Difference]: Without dead ends: 5349 [2022-03-03 19:57:29,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:57:29,066 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:29,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 248 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 442 Invalid, 0 Unknown, 417 Unchecked, 0.2s Time] [2022-03-03 19:57:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-03-03 19:57:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4155. [2022-03-03 19:57:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4154 states have (on average 2.2708233028406357) internal successors, (9433), 4154 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 9433 transitions. [2022-03-03 19:57:29,124 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 9433 transitions. Word has length 32 [2022-03-03 19:57:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:29,124 INFO L470 AbstractCegarLoop]: Abstraction has 4155 states and 9433 transitions. [2022-03-03 19:57:29,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 9433 transitions. [2022-03-03 19:57:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:29,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:29,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:29,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:29,344 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 [2022-03-03 19:57:29,344 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash 388256609, now seen corresponding path program 47 times [2022-03-03 19:57:29,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:29,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854659971] [2022-03-03 19:57:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:29,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:29,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854659971] [2022-03-03 19:57:29,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854659971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:29,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699174635] [2022-03-03 19:57:29,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:57:29,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:29,544 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) [2022-03-03 19:57:29,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:57:29,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:57:29,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:29,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:57:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:29,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:29,816 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 24 treesize of output 24 [2022-03-03 19:57:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:29,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,939 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 22 treesize of output 10 [2022-03-03 19:57:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:29,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:30,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:30,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:30,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:30,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-03-03 19:57:30,437 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 35 treesize of output 31 [2022-03-03 19:57:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:30,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699174635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:30,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:30,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-03-03 19:57:30,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447943424] [2022-03-03 19:57:30,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:30,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:57:30,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:57:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:57:30,553 INFO L87 Difference]: Start difference. First operand 4155 states and 9433 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:31,182 INFO L93 Difference]: Finished difference Result 5217 states and 11757 transitions. [2022-03-03 19:57:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:57:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:31,188 INFO L225 Difference]: With dead ends: 5217 [2022-03-03 19:57:31,188 INFO L226 Difference]: Without dead ends: 5195 [2022-03-03 19:57:31,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:57:31,189 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 119 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:31,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 223 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 406 Invalid, 0 Unknown, 504 Unchecked, 0.2s Time] [2022-03-03 19:57:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2022-03-03 19:57:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 4255. [2022-03-03 19:57:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 2.2717442407146216) internal successors, (9664), 4254 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 9664 transitions. [2022-03-03 19:57:31,265 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 9664 transitions. Word has length 32 [2022-03-03 19:57:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:31,265 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 9664 transitions. [2022-03-03 19:57:31,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 9664 transitions. [2022-03-03 19:57:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:31,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:31,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:31,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-03 19:57:31,485 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 [2022-03-03 19:57:31,485 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash 36126075, now seen corresponding path program 48 times [2022-03-03 19:57:31,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:31,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330392568] [2022-03-03 19:57:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:31,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:31,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330392568] [2022-03-03 19:57:31,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330392568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:31,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009438978] [2022-03-03 19:57:31,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:31,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:31,672 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) [2022-03-03 19:57:31,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:57:31,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:57:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:31,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:31,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:31,942 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 26 treesize of output 26 [2022-03-03 19:57:32,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:32,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:32,025 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 24 treesize of output 10 [2022-03-03 19:57:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:32,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:32,282 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:32,282 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 34 treesize of output 56 [2022-03-03 19:57:32,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:32,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009438978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:32,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:32,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:57:32,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347679341] [2022-03-03 19:57:32,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:32,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:32,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:32,419 INFO L87 Difference]: Start difference. First operand 4255 states and 9664 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:33,204 INFO L93 Difference]: Finished difference Result 6892 states and 15481 transitions. [2022-03-03 19:57:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:57:33,204 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:33,213 INFO L225 Difference]: With dead ends: 6892 [2022-03-03 19:57:33,213 INFO L226 Difference]: Without dead ends: 6717 [2022-03-03 19:57:33,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=2156, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:57:33,214 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:33,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 286 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 336 Invalid, 0 Unknown, 526 Unchecked, 0.1s Time] [2022-03-03 19:57:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-03-03 19:57:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 4460. [2022-03-03 19:57:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.270015698587127) internal successors, (10122), 4459 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 10122 transitions. [2022-03-03 19:57:33,285 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 10122 transitions. Word has length 32 [2022-03-03 19:57:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:33,285 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 10122 transitions. [2022-03-03 19:57:33,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 10122 transitions. [2022-03-03 19:57:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:33,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:33,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:33,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:33,503 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 [2022-03-03 19:57:33,503 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1637833507, now seen corresponding path program 49 times [2022-03-03 19:57:33,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:33,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779655607] [2022-03-03 19:57:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:33,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:33,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:33,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779655607] [2022-03-03 19:57:33,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779655607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:33,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904114165] [2022-03-03 19:57:33,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:57:33,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:33,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:33,721 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) [2022-03-03 19:57:33,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:57:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:33,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:33,970 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 26 treesize of output 26 [2022-03-03 19:57:34,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:34,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:34,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:34,049 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 24 treesize of output 10 [2022-03-03 19:57:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:34,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:34,314 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:34,315 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 34 treesize of output 56 [2022-03-03 19:57:34,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:34,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904114165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:34,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:34,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:57:34,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028717851] [2022-03-03 19:57:34,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:34,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:34,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:34,462 INFO L87 Difference]: Start difference. First operand 4460 states and 10122 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:35,188 INFO L93 Difference]: Finished difference Result 6917 states and 15565 transitions. [2022-03-03 19:57:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:57:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:35,197 INFO L225 Difference]: With dead ends: 6917 [2022-03-03 19:57:35,198 INFO L226 Difference]: Without dead ends: 6736 [2022-03-03 19:57:35,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:57:35,198 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 142 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:35,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 329 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 688 Invalid, 0 Unknown, 515 Unchecked, 0.3s Time] [2022-03-03 19:57:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2022-03-03 19:57:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 4336. [2022-03-03 19:57:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 2.2622837370242213) internal successors, (9807), 4335 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 9807 transitions. [2022-03-03 19:57:35,255 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 9807 transitions. Word has length 32 [2022-03-03 19:57:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:35,256 INFO L470 AbstractCegarLoop]: Abstraction has 4336 states and 9807 transitions. [2022-03-03 19:57:35,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2022-03-03 19:57:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 9807 transitions. [2022-03-03 19:57:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:35,259 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:35,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:35,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:35,460 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 [2022-03-03 19:57:35,460 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:35,460 INFO L85 PathProgramCache]: Analyzing trace with hash -233872393, now seen corresponding path program 50 times [2022-03-03 19:57:35,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:35,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869150941] [2022-03-03 19:57:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:35,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:35,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:35,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869150941] [2022-03-03 19:57:35,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869150941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:35,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463464981] [2022-03-03 19:57:35,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:35,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:35,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:35,646 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) [2022-03-03 19:57:35,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:57:35,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:35,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:57:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:35,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:35,911 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 26 treesize of output 26 [2022-03-03 19:57:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:35,989 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 24 treesize of output 10 [2022-03-03 19:57:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:36,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:36,243 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:57:36,243 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 34 treesize of output 56 [2022-03-03 19:57:36,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:57:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:36,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463464981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:36,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:36,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-03-03 19:57:36,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827054369] [2022-03-03 19:57:36,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:36,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:36,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:36,376 INFO L87 Difference]: Start difference. First operand 4336 states and 9807 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:37,008 INFO L93 Difference]: Finished difference Result 6011 states and 13443 transitions. [2022-03-03 19:57:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:57:37,009 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:57:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:37,015 INFO L225 Difference]: With dead ends: 6011 [2022-03-03 19:57:37,016 INFO L226 Difference]: Without dead ends: 5882 [2022-03-03 19:57:37,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:57:37,016 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:37,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 348 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 510 Invalid, 0 Unknown, 803 Unchecked, 0.2s Time] [2022-03-03 19:57:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2022-03-03 19:57:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 4195. [2022-03-03 19:57:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 2.259656652360515) internal successors, (9477), 4194 states have internal predecessors, (9477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 9477 transitions. [2022-03-03 19:57:37,065 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 9477 transitions. Word has length 32 [2022-03-03 19:57:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:37,065 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 9477 transitions. [2022-03-03 19:57:37,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 9477 transitions. [2022-03-03 19:57:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:37,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:37,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:37,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:37,269 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 [2022-03-03 19:57:37,269 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash -13819161, now seen corresponding path program 51 times [2022-03-03 19:57:37,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:37,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656164085] [2022-03-03 19:57:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:57:37,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:37,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656164085] [2022-03-03 19:57:37,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656164085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:37,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514990346] [2022-03-03 19:57:37,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:37,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:37,500 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) [2022-03-03 19:57:37,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:57:37,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:57:37,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:57:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:37,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:37,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-03 19:57:37,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:37,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-03-03 19:57:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:37,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-03 20:08:58,054 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 20:08:58,055 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 20:08:58,063 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:08:58,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 20:08:58,093 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 [2022-03-03 20:08:58,256 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 [2022-03-03 20:08:58,256 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 2ms.. [2022-03-03 20:08:58,257 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 20:08:58,258 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 20:08:58,259 INFO L732 BasicCegarLoop]: Path program histogram: [51, 1, 1] [2022-03-03 20:08:58,261 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:08:58,261 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:08:58,262 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:08:58 BasicIcfg [2022-03-03 20:08:58,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:08:58,262 INFO L158 Benchmark]: Toolchain (without parser) took 773802.57ms. Allocated memory was 189.8MB in the beginning and 396.4MB in the end (delta: 206.6MB). Free memory was 153.6MB in the beginning and 274.9MB in the end (delta: -121.3MB). Peak memory consumption was 246.9MB. Max. memory is 8.0GB. [2022-03-03 20:08:58,263 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 189.8MB. Free memory was 154.9MB in the beginning and 154.7MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:08:58,263 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.74ms. Allocated memory is still 189.8MB. Free memory was 153.6MB in the beginning and 152.0MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-03 20:08:58,263 INFO L158 Benchmark]: Boogie Preprocessor took 16.53ms. Allocated memory is still 189.8MB. Free memory was 152.0MB in the beginning and 151.1MB in the end (delta: 901.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:08:58,263 INFO L158 Benchmark]: RCFGBuilder took 171.95ms. Allocated memory is still 189.8MB. Free memory was 151.1MB in the beginning and 141.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:08:58,263 INFO L158 Benchmark]: TraceAbstraction took 773584.06ms. Allocated memory was 189.8MB in the beginning and 396.4MB in the end (delta: 206.6MB). Free memory was 141.1MB in the beginning and 274.9MB in the end (delta: -133.8MB). Peak memory consumption was 233.3MB. Max. memory is 8.0GB. [2022-03-03 20:08:58,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 189.8MB. Free memory was 154.9MB in the beginning and 154.7MB in the end (delta: 143.3kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.74ms. Allocated memory is still 189.8MB. Free memory was 153.6MB in the beginning and 152.0MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.53ms. Allocated memory is still 189.8MB. Free memory was 152.0MB in the beginning and 151.1MB in the end (delta: 901.2kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 171.95ms. Allocated memory is still 189.8MB. Free memory was 151.1MB in the beginning and 141.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 773584.06ms. Allocated memory was 189.8MB in the beginning and 396.4MB in the end (delta: 206.6MB). Free memory was 141.1MB in the beginning and 274.9MB in the end (delta: -133.8MB). Peak memory consumption was 233.3MB. 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: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 2ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 2ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 2ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 773.5s, OverallIterations: 53, TraceHistogramMax: 2, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.1s, AutomataDifference: 27.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7585 SdHoareTripleChecker+Valid, 7.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7585 mSDsluCounter, 11898 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19136 IncrementalHoareTripleChecker+Unchecked, 16771 mSDsCounter, 1584 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17660 IncrementalHoareTripleChecker+Invalid, 38380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1584 mSolverCounterUnsat, 1312 mSDtfsCounter, 17660 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4938 GetRequests, 2515 SyntacticMatches, 221 SemanticMatches, 2202 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 40328 ImplicationChecksByTransitivity, 35.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4460occurred in iteration=50, InterpolantAutomatonStates: 1537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 52 MinimizatonAttempts, 26546 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 51.2s InterpolantComputationTime, 3204 NumberOfCodeBlocks, 3204 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 4638 ConstructedInterpolants, 832 QuantifiedInterpolants, 56221 SizeOfPredicates, 862 NumberOfNonLiveVariables, 3371 ConjunctsInSsa, 1089 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 79/1900 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